# US 2019/0313752 A1 · Trolley case with front open > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0313752 A1 - Document ID: US20190313752A1 - Status: Published application - Kind: A1 - Application number: 16/268,900 - Filed: 2019-02-06 - Published: 2019-10-17 - Earliest claimed: 2018-04-17 - Assignees: Chengdu Skywalker Technology Co., Ltd.; Xiamen Compucase Trading Co., Ltd - Applicants: Chengdu Skywalker Technology Co., Ltd.; Xiamen Compucase Trading Co., Ltd. - Inventors: Yonghao LUO; Zuolin CHEN - Web page: https://patentgrep.com/patent/US20190313752A1 ## CPC - A45C 5/03: Suitcases - A45C 5/06: with outside compartments - A45C 13/005: {Hinges} - A45C 13/04: Frames - A45C 5/14: with built-in rolling means - A45C 2005/037: {with a hard shell, i.e. rigid shell as volume creating element} - A45C: PURSES; LUGGAGE; HAND CARRIED BAGS ## Abstract The invention claims a front-openable draw-bar box, comprising a box body and a draw-bar, wherein the front side of the box body is provided with an opening; a front cover is set on the opening, and the upper end thereof is connected with the box body through a buckle or a hook hole latch while the lower end thereof is connected with the box body through a spring cotter or a hinge or a damping structure; a switch is set above the box body. The box body is firmly connected with front cover, facilitating to lock and unlock the box body, with the advantages of safe and convenient use, the invention is especially applicable for travel. ## Claims ### Claim 1 A front-openable draw-bar box, comprising a box body and a draw-bar, wherein the front side of the box body is provided with an opening; a front cover is set on the opening, and the upper end thereof is connected with the box body through a buckle or a hook hole latch while the lower end thereof is connected with the box body through a spring cotter or a hinge or a damping structure; a switch is set above the box body. ### Claim 2 (depends on 1) A front-openable draw-bar box according to claim 1, wherein: the spring cotter structure employs the snap ring of the front cover and the spring cotter on the box body below the opening for superposition connection. ### Claim 3 (depends on 1) A front-openable draw-bar box according to claim 1, wherein: the buckle structure employs the bulge connected with the switch at the upper end of the box body to buckle with the groove at the upper end of the front cover for connection. ### Claim 4 (depends on 1) A front-openable draw-bar box according to claim 1, wherein: the upper end of the front cover comprises a hook hole, the box body above the opening comprises a latch, the hook hole and the latch are in coordinate connection; the switch is a toggle switch which is connected with the hook hole and can be left and right toggled to synchronously control the left and right movement of the hook hole. ### Claim 5 (depends on 1) A front-openable draw-bar box according to claim 1, wherein: the front cover is composed of a base plate and a support plate; the support plate is set on the base plate; two hook holes are set on the base plate; the lower end of the base plate is provided with a connecting base; the box body above the opening comprises two latches in coordinate connection with the hook holes; a connecting rod is connected above the latches; the switch on the box body is a press switch; a press plate is connected above the connecting rod; the press switch is connected with the connecting rod through the press plate. ### Claim 6 (depends on 5) A front-openable draw-bar box according to claim 5, wherein: two support rods are connected above the latches; a drive plate with a gap is connected above the support rods and is connected with the box body through the spring; a stress rod is configured above the drive plate; the bottom of the stress rod is connected with the gaps of the two drive plates; the press switch is connected with the stress rod to control the downward brake of the stress rod. ### Claim 7 (depends on 5) A front-openable draw-bar box according to claim 5, wherein: a hinge is set on the connecting base; the bottom of the front cover is connected with the box body through the hinge; the support plate is adhered on the bottom plate; the base plate is made of aluminum material through punching; the support plate is integrally made of plastic material. ### Claim 8 (depends on 1) A front-openable draw-bar box according to claim 1, wherein: an arc gear is set at the bottom of the front cover; a protection cover and a gear wheel are set at the bottom of the box body; the gear wheel is set inside the protection cover; the gear wheel is engaged with the arc gear. ### Claim 9 (depends on 8) A damping structure of a front-openable draw-bar box according to claim 8, wherein the perimeter of the arc gear is one third or one half of the perimeter of the gear wheel. ### Claim 10 (depends on 1) A front-openable draw-bar box according to claim 1, wherein: the box body is thereon provided with a coded lock which is connected with the switch. ### Claim 11 (depends on 10) A front-openable draw-bar box according to claim 10, wherein: the coded lock is composed of a code wheel and a key latch. ### Claim 12 (depends on 11) A front-openable draw-bar box according to claim 11, wherein: the coded lock comprises three code wheels; the box body and the front cover are both made of aluminum material.