US 11,698,573 B2Granted

Adapter device, mount apparatus, and accessory

AssigneeCanon Kabushiki Kaisha

InventorMasayasu Shigematsu

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Abstract

An adapter device includes a first mount and a second mount. The first mount is fastened to the adapter device by multiple screws, and has first through third mount recesses and first through third mount claws disposed following a circumferential direction. The second mount is fastened to the device by multiple screws, and has fourth through sixth mount claws and fourth through sixth mount recesses disposed following the direction. The first through third mount claws are insertable to mount recesses on an imaging apparatus, the fourth through sixth mount claws are insertable to mount recesses on an accessory, and the smallest angle range of the first through third mount recesses in the direction of the first mount is not greater than the smallest angle range of the fourth through sixth mount claws in the direction of the second mount.

Claims24

Dependent claims

A mount apparatus that is attachable to and detachable from an accessory having a first mount provided with a plurality of claws, the mount apparatus comprising:

a second mount fastened to the mount apparatus by a plurality of screws and provided with a plurality of mount claws configured to be engaged with the plurality of claws provided to the first mount;
and
a plurality of biasing members configured to bias the plurality of claws provided to the first mount in a center axis direction of the second mount,
wherein the plurality of mount claws provided to the second mount is provided following a circumferential direction of the second mount and includes a first mount claw, a second mount claw, and a third mount claw,
wherein the first mount claw has an angle range and the second and third mount claws each have an angle range in the circumferential direction of the second mount that is smaller than the angle range of the first mount claw,
wherein the first, second, and third mount claws respectively have a first, second, and third biasing member arrangement portions on which each of the plurality of biasing members is arranged, and
wherein, in a case where a line extending from a center of the second mount in a gravitational direction and a direction opposite to the gravitational direction when viewing the mount apparatus in a normal position from the center axis direction of the second mount is taken as a first mount center line, and where a line orthogonal to the first mount center line is taken as a second mount center line, the following is viewed when viewing the second mount in the center axis direction of the second mount:
(i) the first mount claw overlaps the first mount center line, and at least one of the second mount claw and the third mount claw overlap the second mount center line, in a radial direction of the second mount,
(ii) the first biasing member arrangement portion overlaps the first mount center line in the radial direction of the second mount, and
(iii) the second biasing member arrangement portion overlaps the second mount center line in the radial direction of the second mount.

7 more elements

An accessory attachable to and detachable from a mount apparatus having a first mount provided with a plurality of claws, the accessory comprising:

a second mount fastened to the accessory by a plurality of screws and provided with a plurality of mount claws, which include a first mount claw, a second mount claw, and a third mount claw, and provided with a plurality of mount recesses configured to be engaged with the plurality of claws provided to the first mount,
wherein the plurality of mount recesses provided to the second mount is provided following a circumferential direction of the second mount and includes a first mount recess, a second mount recess, and a third mount recess,
wherein the first mount recess has an angle range and the second and third mount recesses each have an angle range in the circumferential direction of the second mount that is smaller than the angle range of the first mount recess,
wherein, in a state where the accessory is attached to the mount apparatus, the plurality of mount claws provided to the second mount are biased in a center axis direction of the second mount by each of a plurality of biasing members arranged in each space provided in the plurality of claws provided to the first mount,
wherein, in a case where a line extending from a center of the second mount in a gravitational direction and a direction opposite to the gravitational direction when viewing from the center axis direction of the second mount with the mount apparatus to which the accessory is mounted in a normal position, is taken as a first mount center line, the following is viewed when viewing the second mount in the center axis direction of the second mount:
(i) the first mount center line does not overlap any of the plurality of mount recesses provided to the second mount, and
(ii) of the plurality of biasing members, at least a biasing member which biases the first mount claw overlaps the first mount center line in the state where the accessory is attached to the mount apparatus.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/184,362Filed 24 Feb 2021 · continuation
Priority: 29 Aug 2018
Published: US 2021/0181607 A117 Jun 2021
Granted: 11 Jul 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G03B 17/56
Details of cameras or camera bodies; Accessories therefor: accessories
G03B 17/14
With means for supporting objectives, supplementary lenses, filters, masks, or turrets: interchangeably
G03B 17/565
Accessories: optical accessories, e.g. converters for close-up photography, tele-convertors, wide-angle convertors
H04N 23/55
Constructional details: optical parts specially adapted for electronic image sensors; Mounting thereof