# US 11,299,920 B2 · Locking device and refrigerator using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,299,920 B2 - Document ID: US11299920B2 - Status: Granted - Kind: B2 - Application number: 16/526,307 - Filed: 2019-07-30 - Published: 2020-02-06 - Granted: 2022-04-12 - Earliest claimed: 2018-08-01 - Applicants: Ningbo Eudemon Child Protective Equipment Co., Ltd. - Inventors: Zhen Zhang - Web page: https://patentgrep.com/patent/US11299920B2 ## CPC - E05B 65/0042: {For refrigerators or cold rooms (E05B17/0075 takes precedence; magnetic E05C19/16)} - E05C 19/06: in which the securing part if formed or carried by a spring and moves only by distortion of the spring, e.g. snaps - E05C 19/007: {Latches with wedging action (wedges between wing itself and fixed surface E05C17/54)} - E05B 2015/0235: {Stud-like} - E05B 2063/0026: {Elongated, e.g. stud-like, striker entering into an opening in which movable detent means engage the elongated striker} - E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS - E05C: BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS (latching means for sideboard or tailgate structures for vehicles B62D, {B62D33/02}; fastening devices for constructional or engineering elements E04, F16B; locks, fastening devices structurally or operatively combined or having significant cooperation with locks E05B; means for operating or controlling wing fasteners in conjunction with mechanisms for moving the wing E05F) ## Abstract The invention discloses a locking device and a refrigerator, wherein the locking device comprises a first lock block and a second lock block; the first lock block comprises a base and a tongue; the second lock block comprises an accommodating cavity, a clamping block, a return spring and a pushing block; the pushing block pushes the clamping block to slide in the sliding groove; and the tongue enters the tongue channel to be engaged with the clamping block so that the two lock blocks are engaged with each other. The locking device has the function of automatically adjusting the height difference between different cabinet doors and cabinet bodies, and is therefore more flexibly suitable for locking various cabinets or refrigerators. ## Claims ### Claim 1 A locking device, comprising a first lock block comprising a base and a tongue fixed on the base; a second lock block comprising an accommodating cavity, a clamping block, a return spring and a pushing block, the accommodating cavity being internally provided with a tongue channel which has an inlet; a sliding groove being at least arranged at one side of the tongue channel, wherein the clamping block is tensioned in the sliding groove by the return spring, so that in the case that the tongue enters the tongue channel from the inlet, the clamping block is engaged with the tongue and the first lock block is engaged with the second lock block, wherein the pushing block pushes the clamping block to slide in the sliding groove, so that the clamping block is disengaged from the tongue to lock the first lock block and the second lock block, and wherein the first lock block is further provided with an adjusting portion which comprises a shaft portion arranged on the base, a sleeve portion arranged on the tongue, a shaft seat and a tension spring; the shaft portion is mounted on the shaft seat the sleeve portion is fastened outside the shaft portion; the tension spring is fixed between the tongue and the base; and the tongue swings at a slight angle to the base around the shaft portion as an axis. ### Claim 2 (depends on 1) The locking device according to claim 1, wherein the tongue channel is internally provided with a guiding portion which is gradually inclined in an ascending manner from the inlet to the inside of the tongue channel. ### Claim 3 (depends on 2) The locking device according to claim 2, wherein a wedge block is arranged at a front end of the clamping block, a sliding cavity is arranged on the body of the clamping block, and the sliding cavity comprises a stress surface and a sliding space opposite to the stress surface. ### Claim 4 (depends on 3) The locking device according to claim 3, wherein the stress surface is a first inclined surface; the pushing block is provided with a second inclined surface that partially fits against the first inclined surface; and the second inclined surface slides vertically along the first inclined surface and enters the sliding space so that the clamping block slides along the sliding groove. ### Claim 5 (depends on 4) The locking device according to claim 4, wherein the accommodating cavity comprises a bottom wall and a cover body, the bottom wall is connected with the cover body through bolts and the sliding groove is arranged on the cover body. ### Claim 6 (depends on 5) The locking device according to claim 5, wherein a guiding surface is arranged at the inlet and the guiding surface is flared. ### Claim 7 (depends on 1) The locking device according to claim 1, wherein the accommodating cavity comprises a bottom wall and a cover body, the bottom wall is connected with the cover body through bolts and the sliding groove is arranged on the cover body. ### Claim 8 (depends on 7) The locking device according to claim 7, wherein a guiding surface is arranged at the inlet and the guiding surface is flared. ### Claim 9 (depends on 1) The locking device according to claim 1, wherein the tongue channel is internally provided with a guiding portion which is gradually inclined in an ascending manner from the inlet to the inside of the tongue channel. ### Claim 10 (depends on 9) The locking device according to claim 9, wherein a wedge block is arranged at a front end of the clamping block, a sliding cavity is arranged on the body of the clamping block, and the sliding cavity comprises a stress surface and a sliding space opposite to the stress surface. ### Claim 11 (depends on 10) The locking device according to claim 10, wherein the stress surface is a first inclined surface; the pushing block is provided with a second inclined surface that partially fits against the first inclined surface; and the second inclined surface slides vertically along the first inclined surface and enters the sliding space so that the clamping block slides along the sliding groove. ### Claim 12 (depends on 11) The locking device according to claim 11, wherein the accommodating cavity comprises a bottom wall and a cover body, the bottom wall is connected with the cover body through bolts and the sliding groove is arranged on the cover body. ### Claim 13 (depends on 12) The locking device according to claim 12, wherein a guiding surface is arranged at the inlet and the guiding surface is flared. ### Claim 14 (depends on 1) The locking device according to claim 1, wherein a wedge block is arranged at a front end of the clamping block, a sliding cavity is arranged on the body of the clamping block, and the sliding cavity comprises a stress surface and a sliding space opposite to the stress surface. ### Claim 15 (depends on 14) The locking device according to claim 14, wherein the stress surface is a first inclined surface; the pushing block is provided with a second inclined surface that partially fits against the first inclined surface; and the second inclined surface slides vertically along the first inclined surface and enters the sliding space so that the clamping block slides along the sliding groove. ### Claim 16 (depends on 15) The locking device according to claim 15, wherein the accommodating cavity comprises a bottom wall and a cover body, the bottom wall is connected with the cover body through bolts and the sliding groove is arranged on the cover body. ### Claim 17 (depends on 16) The locking device according to claim 16, wherein a guiding surface is arranged at the inlet and the guiding surface is flared. ### Claim 18 (depends on 1) A refrigerator, comprising a body and a door hinged on the body, a locking device being arranged between the body and the door, wherein the locking device includes the locking device according to claim 1.