JP2023104198A - Bracket for on-vehicle equipment - Google Patents

Abstract

To rationally and properly impart to a bracket a structure for facilitating removal operation of on-vehicle equipment.SOLUTION: A bracket for on-vehicle equipment is provided with a receiving part 3 which receives and holds the on-vehicle equipment to the inside by being formed so as to protrude from a base part 2 to a side opposed to a stationary side in the base part 2 fixed to a vehicle body side. The receiving part 3 is configured so as to comprise: a holding piece 7 which is constituted of part of an inner surface part of the receiving part 3, permits receiving of the on-vehicle equipment by means of elastic deformation, and engages an engagement part 7a with a held part 100f formed on the on-vehicle equipment by means of elastic restoration at an end position of the receiving; and a concave part 6e for exposure which exposes at least one of two thickness lateral parts 7g adjoining a formation lateral part 7f of the engagement part 7a in the holding piece 7 between a protruding end of the receiving part 3 and the base part 2.SELECTED DRAWING: Figure 2

Description

The present invention relates to improvements in brackets used to hold on-vehicle equipment.

The left and right columnar support portions protruding downward from the base portion fixed to the window glass each allow an upward movement operation of the vehicle-mounted camera by elastic deformation, and the vehicle-mounted camera is elastically restored at the end position of the movement operation. Patent Document 1 discloses a bracket provided with a holding piece that engages with the .

JP 2020-128136 A

However, in-vehicle equipment held by this type of bracket may need to be replaced or repaired, and in such a case, removal from the bracket is required. In the case of Patent Document 1, it is necessary to elastically deform the holding piece to disengage it from the vehicle-mounted camera in order to remove it.

The main problem to be solved by the present invention is to rationally and appropriately provide this type of bracket with a structure that facilitates the work of removing the in-vehicle equipment.

In order to solve the above-mentioned problems, in the present invention, an in-vehicle device bracket is a bracket for holding an in-vehicle device at a predetermined position of a vehicle body, the fixing portion being fixed at a base portion fixed to the vehicle body side. a receiving portion formed so as to protrude from the base portion on the side opposite to the side and receiving and holding the in-vehicle device inside;
in the receiving part,
The held portion formed in the in-vehicle device by elastic deformation and elastic recovery at the end position of the receiving portion. a holding piece that engages the engaging portion;
an exposing recess that exposes at least one of two thickness side portions adjacent to the forming side portion of the engaging portion as the inner surface portion of the holding piece between the protruding end of the receiving portion and the base portion; It was supposed to be prepared for.

According to this configuration, firstly, the receiving state of the in-vehicle device in the receiving portion is allowed by elastic deformation, and the engaging portion is engaged with the held portion of the in-vehicle device by elastic return at the receiving end position. It can be maintained by mating retaining pieces. Thus, the vehicle-mounted device can be mounted at a predetermined location on the vehicle body via the bracket. Secondly, by operating the tip of a tool so as to elastically deform the holding piece, the engagement with the held portion is released, and the on-vehicle device is removed from the receiving portion, and the on-vehicle device is removed from the vehicle body side. can be removed. The holding piece can be easily visually recognized by the recess for exposure, and the operation of elastically deforming the holding piece using the tip of a tool or the like can be easily performed.

A virtual first plane including the inner surface portion and a virtual first plane including the adjacent side surface portion in the columnar portion that includes the inner surface portion and the adjacent side surface portion that intersects the inner surface portion and constitutes a part of the receiving portion It is one aspect of the present invention that the exposing concave portion is formed in the columnar portion by cutting off an imaginary corner portion in contact with the second plane of the columnar portion.

Further, when the holding piece is pressed to a position where at least part of the side surface portion of the engaging portion of the holding piece is flush with the bottom surface portion of the recess for exposure, the engagement with the held portion is achieved. It is one aspect of the present invention to disengage the joint.

Further, it is an aspect of the present invention that a part of the inner surface portion of the receiving portion is formed between the engaging portion and the base portion and faces the held portion at the end position of the receiving portion. considered one of the

Further, the retained portion facing the position restricting portion is provided between the position restricting portion and an abutment surface portion disposed in a direction perpendicular to the position restricting portion and in contact with the retained portion from the base portion side. It is one aspect of the present invention to form a recess for accommodating the corner formed between the side portion of the contact surface and the surface portion in contact with the contact surface portion.

According to the present invention, this type of bracket can be rationally and appropriately provided with a structure that facilitates the work of removing the in-vehicle device.

FIG. 1 is a perspective view of a bracket according to one embodiment of the invention. FIG. 2 is a perspective view showing the bracket as viewed from below. FIG. 3 is a perspective view showing the bracket as viewed from below, and the viewing direction is different from that of FIG. 4 is an enlarged perspective view of a main part of FIG. 3. FIG. FIG. 5 is a bottom view of the bracket. 6 is an enlarged view of a main portion of FIG. 5. FIG. 7 is a cross-sectional view taken along the line AA in FIG. 5. FIG. 8 is a cross-sectional view of the bracket at a middle position in the left-right direction in FIG. 5. FIG. FIG. 9 is a side view of the bracket viewed from the rear side. FIG. 10 is a perspective view showing a state in which the on-vehicle device is held by the bracket. FIG. 11 is a bottom view showing a state in which the on-vehicle device is held by the bracket. 12 is a cross-sectional view taken along the line BB in FIG. 11. FIG. 13 is a cross-sectional view of the bracket at the middle position in the left-right direction in FIG. 11. FIG. FIG. 14 is a side view of the bracket holding the in-vehicle device as seen from the rear side. FIG. 15 is a side view of the essential part showing the engagement state between the right holding piece and the in-vehicle device in the state of FIG. 16 is a side view of a main part showing a state in which the holding piece and the in-vehicle device are disengaged from the state shown in FIG. 15. FIG.

A typical embodiment of the present invention will be described below with reference to FIGS. 1 to 16. FIG. A bracket 1 according to this embodiment is for holding an in-vehicle device at a predetermined position on a vehicle body.

In the illustrated example, the bracket 1 has a configuration suitable for attaching an in-vehicle camera 100 as an in-vehicle device that captures an image of the outside of the vehicle through the window glass of the vehicle to the front window W (see FIG. 13) as the window glass. . In the illustrated example, the bracket 1 is used to attach an in-vehicle camera 100 to the front window W of an automobile, which captures an image of the outside of the vehicle through the front window W of the automobile.

1 and 13, reference numeral 1 denotes a bracket, and reference numeral 100 denotes an in-vehicle camera. 1 and 13, the front side of the vehicle is indicated by xa in FIGS. 1 and 13, and the rear side of the vehicle is indicated by xb in FIGS. 1 and 12, symbol y indicates the left-right direction of the vehicle. The vertical direction is indicated by symbol z in FIG.

The front window W is inclined with the front side xa of the vehicle being inclined downward. The bracket 1 is fixed to the surface of the front window W on the inside of the vehicle.
In this embodiment, in a state in which the bracket 1 is fixed to the front window W, the vehicle-mounted camera 100 is slidably moved from the front side xa of the vehicle toward the rear side xb of the vehicle with respect to the bracket 1 to a predetermined position. After the operation, the vehicle-mounted camera 100 is fitted into the bracket 1 by moving the front portion 100a of the vehicle-mounted camera 100 upward to a predetermined position.

In the illustrated example, the in-vehicle camera 100 is attached to the front window W via the bracket 1 so that the light entrance portion 100b for imaging faces the front side xa of the vehicle.

In the illustrated example, the vehicle-mounted camera 100 has a step 100d facing the front side xa of the vehicle between the front portion 100a and the rear portion 100c on its upper side, and the step 100d is provided with the light entrance portion 100b. ing. The camera body 2b has a small vertical z dimension between the front portion 100a and the step 100d, and a large vertical z dimension between the step 100d and the rear portion 100c.

The bracket 1 includes a base portion 2 fixed to the inner surface of the front window W as the window glass,
A receiving portion 3 is formed so as to protrude from the base portion 2 on the side opposite to the fixed side of the base portion 2 and receives and holds an in-vehicle device inside.

In addition, the receiving unit 3
a contact portion 4 against the rear portion 100c of the in-vehicle camera 100;
a support portion 5 located on the front side of the abutment portion 4, i.e., on the front side xa of the vehicle in the illustrated example, for receiving a supported portion 100e provided in the vehicle-mounted camera 100 from the front;
Columnar portions 6 are provided on the front side of the support portion 5, i.e., on the left and right sides of the front side xa of the vehicle in the illustrated example, and receive the front portion 100a side of the vehicle-mounted camera 100 therebetween.

The left and right columnar portions 6 have substantially the same structure, and one columnar portion 6 and the other columnar portion 6 extend along the front-rear direction x passing through the middle position of the bracket 1 in the left-right direction y. It has a shape that is symmetrical about the virtual center line L1 (see FIG. 2).

In addition, the bracket 1 is configured such that the left and right columnar portions 6 each support the front portion of the in-vehicle camera 100 with the supported portion 100e from the state in which the supported portion 100e is received by the support portion 5 as a fulcrum. A holding piece that permits an upward moving operation on the 100a side by elastic deformation and elastically returns at the end position of the moving operation to engage the engaging portion 7a with the held portion 100f provided in the vehicle-mounted camera 100. 7.

According to this configuration, when the vehicle-mounted camera 100 is slid to the position where the rear portion 100c of the vehicle-mounted camera 100 abuts against the abutting portion 4, the supported portion 100e can be received by the support portion 5 from the front side. can be done. As a result, it is possible to minimize the need for special consideration for positioning in the operation of combining the vehicle-mounted camera 100 with the bracket 1 .

In addition, since the left and right columnar portions 6 are provided with the holding pieces 7 respectively, the in-vehicle mounting position can be adjusted with the supported portion 100e as a fulcrum from the state in which the supported portion 100e is received by the support portion 5. By moving the front portion 100a side of the camera 100 upward, the vehicle-mounted camera 100 is held by the bracket 1 in such a manner that the vertical rattle is reduced as much as possible, and the vehicle-mounted camera 100 does not rattle in the horizontal direction. It can be held by the bracket 1 in such a way that sticking is reduced as much as possible.

In the illustrated example, the bracket 1 is an injection-molded product of synthetic resin in which the base portion 2 is integrally provided with the abutment portion 4 , the support portion 5 , and the columnar portion 6 . The receiving portion 3 is formed by the contact portion 4 , the support portion 5 and the columnar portion 6 .

The holding piece 7 is formed of the inner surface portion 6a of the columnar portion 6 as a part of the inner surface portion of the receiving portion 3 facing inward. As a result, the bracket 1 can be formed into one piece, and the holding piece 7 can be reasonably imparted with a desired elastic deformation characteristic.

The base portion 2 has a plate-like appearance with a substantially rectangular outline in plan view. The in-vehicle camera 100 is received and held in a receiving portion 3 surrounded by a contact portion 4 , left and right support portions 5 , and left and right columnar portions 6 on the lower surface 2 a side of the base portion 2 . An open portion 2b is formed between the front end and the rear end of the base portion 2 to receive the light entrance portion 100b of the vehicle-mounted camera 100 from below.

On the upper surface 2c of the base portion 2, a light guide groove 2d is formed between the front end and the open portion 2b so that the width of the groove in the left-right direction z gradually narrows as it approaches the open portion 2b. formed.

A portion of the upper surface 2c of the base portion 2 excluding the light guide groove 2d and excluding the window hole directly above the support portion 5 and the columnar portion 6 indicated by reference numeral 2e in FIG. It is a mounting surface for the window W. In the illustrated example, the bracket 1 is attached to the front window W by bonding using this attachment surface. The mounting surface has an inclination following the inclination of the front window W.

The contact portion 4 is provided at the middle position in the left-right direction z at the rear end portion of the base portion 2 . In the illustrated example, the abutting portion 4 includes a rigid rear projection 4a projecting downward from the lower surface 2a of the base portion 2, and a springy elastic piece positioned in front of the rear projection 4a. 4b. The vehicle-mounted camera 100 is supported between the rear projection 4a and the front projection 8 shown in FIG. This prevents the in-vehicle camera from wobbling in the front-rear direction x.

The support portions 5 are provided on the left and right sides of the center line L1 between the contact portion 4 and the columnar portion 6, respectively. Each of the left and right support portions 5 includes a base portion 5a that protrudes downward from the lower surface 2a of the base portion 2, and a hook portion 5b that laterally protrudes from the lower end of the base portion 5a toward the center line L1.

The supported portions 100e of the vehicle-mounted camera 100 are provided on the left and right side portions on the rear portion 100c side of the vehicle-mounted camera 100, and have a fin shape extending in the front-rear direction x. The distance between the projecting ends of the left and right supported portions 100e is substantially equal to the distance between the base portions 5a of the left and right support portions 5, and is greater than the distance between the left and right hook portions 5b. Thereby, the supported portion 100e can be received in the support portion 5 from the front side.

The columnar portions 6 are provided on the left and right sides of the center line L1 between the open portion 2b and the front end of the base portion 2, respectively. The left and right columnar portions 6 are formed to protrude downward from the lower surface 2a of the base portion 2, respectively. More specifically, the columnar portion 6 has a hollow rectangular tubular shape with a closed lower end. An inner surface portion 6 a of the columnar portion 6 facing the center line L<b>1 side constitutes a part of the inner surface portion of the receiving portion 3 . The holding piece 7 is formed by part of the inner surface portion 6a of the columnar portion 6. As shown in FIG.

In the illustrated example, the columnar portion 6 is open at its upper end and communicates with the window hole 2 e formed in the base portion 2 . Through this window hole 2e, the inside of the columnar portion 6 can be formed by injection molding.

In the inner surface portions 6a of the left and right columnar portions 6, split grooves 6c extending from the lower ends 6b of the columnar portions 6 (projecting ends of the receiving portions 3) to the upper ends of the columnar portions 6 are formed in two rows at intervals in the front-rear direction x. formed. A space between the two split grooves 6c functions as the holding piece 7. As shown in FIG. The upper ends of the two split grooves 6c are open to communicate with side window holes 6d, which will be described later, and the upper ends of the holding pieces 7 are free ends 7b.

Between the upper end of the holding piece 7 and the base portion 2, the inner surface portion 6a of the columnar portion 6 is cut away, and a side window hole 6d communicating with the columnar portion 6 is formed.

The holding piece 7 has an engaging portion 7a that restricts downward movement of the held portion 100f in the engaged state. Specifically, the engaging portion 7a is formed by a protruding portion below the free end portion 7b of the holding piece 7 and protruding toward the center line L1. The engaging portion 7a has an inclined surface 7d whose distance from the center line L1 gradually decreases toward the top portion 7c below the top portion 7c, and an upward engaging surface 7e on the top portion 7c. .

A held portion 100f of the vehicle-mounted camera 100 has a fin plate shape that protrudes from a side portion of the vehicle-mounted camera 100 in front of the step 100d of the vehicle-mounted camera 100 and continues in the front-rear direction. Such held portions 100f are formed on the left and right sides of the vehicle-mounted camera 100, respectively. Further, the plate surface of the held portion 100f is arranged sideways. Also, the dimension between the side portions 100fa of the left and right held portions 100f facing the position regulating portion 9, which will be described later, is smaller than the distance between the holding pieces 7 of the left and right columnar portions 6 on the side of the lower ends 6b of the left and right columnar portions 6. Alternatively, although equal, the distance is greater than the distance between the holding pieces 7 of the left and right columnar portions 6 at the position of the top portion 7c of the engaging portion 7a.

Therefore, in this embodiment, in a state in which the held portion 100f of the vehicle-mounted camera 100 is positioned below the engaging portions 7a of the left and right columnar portions 6, the abutment portion 4 of the bracket 1 is to the position where the rear portion 100c of the vehicle-mounted camera 100 abuts against the vehicle-mounted camera 100 so that the corresponding supported portion 100e enters between the hook portion 5b of the support portion 5 on the left and right of the bracket 1 and the lower surface 2a of the base portion 2. 100 can be operated to slide. From this state, when the front portion 100a side of the vehicle-mounted camera 100 is moved upward using the supported portion 100e as a fulcrum, the held portion 100f engages the engaging portion 7a of the holding piece 7 of the columnar portion 6. As a result, the holding piece 7 is elastically deformed, and the operation of moving the vehicle-mounted camera 100 upward on the front portion 100a side is permitted to the position where the held portion 100f climbs over the engaging portion 7a. Such elastic deformation of the holding piece 7 is smooth because the held portion 100f is brought into sliding contact with the inclined surface 7d of the engaging portion 7a. When the held portion 100f climbs over the engaging portion 7a, the left and right holding pieces 7 are elastically restored in a direction to narrow the distance between them, and the engaging surface 7d of the engaging portion 7a engages the held portion 100f from below. Get caught. This restricts the downward movement of the in-vehicle camera 100 .

Further, in this embodiment, a portion of the receiving portion 3 is formed between the protruding end of the receiving portion 3, which is the lower end 6b of the columnar portion 6 in the illustrated example, and the base portion 2. The columnar portion 6 is formed with an exposure concave portion 6e for exposing at least one of two thickness side portions 7g adjacent to the formation side portion 7f of the engaging portion 7a of the holding piece 7. As shown in FIG.

In this embodiment, the columnar portion 6 has an inner surface portion 6a substantially parallel to the center line L1 and an adjacent side surface portion 6f intersecting with the inner surface portion 6a. The adjacent side surface portions 6f are present on the front side xa and the rear side xb, respectively, and are surface portions orthogonal to the center line L1. The columnar portion 6 has an outer surface portion 6g outside the inner surface portion 6a and a lower surface portion 6h at the lower end.

In this embodiment, a virtual corner cn where a virtual first plane s1 including the inner surface portion 6a and a virtual second plane s2 including the adjacent side surface portion 6f are in contact is excised. Then, the exposing concave portion 6e is formed in the columnar portion 6 (see FIG. 6).

In the illustrated example, the inner surface portion 6a and the inner surface portion 6a and The exposing concave portion 6e is formed in the columnar portion 6 by removing a portion of the adjacent side surface portion 6f (see FIG. 6).

Due to the exposure recess 6e, the adjacent side surface portion 6f is positioned at a level where the engaging surface 7e of the engaging portion 7a of the holding piece 7 is positioned from the lower end 6b of the columnar portion 6 when the columnar portion 6 is viewed from the rear side xb. , the lateral width of the adjacent side surface portion 6f positioned rearward is reduced (see FIG. 4).

More specifically, the exposure recess 6e forms a bottom portion 6i of the exposure recess 6e extending vertically from the lower end 6b of the columnar portion 6 to the level where the engaging surface 7e is positioned. there is In the illustrated example, the holding piece 7 has an inclination that gradually approaches the center line L1 as it approaches the engaging portion 7a from the lower end 6b side of the columnar portion 6, and the bottom portion 6i also follows this inclination. and a second portion 6ib behind the inclined surface 7e of the engaging portion 7a and having an inclination following the inclination of the inclined surface 7e.

In the bracket 1 according to this embodiment, firstly, the receiving state of the on-vehicle device in the receiving portion 3 is allowed by elastic deformation, and the on-vehicle device is covered by the elastic return at the receiving end position. It can be maintained by the holding piece 7 that engages the engaging portion 7a with the holding portion 100f. As a result, the vehicle-mounted device can be mounted at a predetermined location on the vehicle body via the bracket 1 . Secondly, by operating the tip of a tool so as to elastically deform the holding piece 7, the engagement with the held portion 100f is released, and the in-vehicle device is removed from the receiving portion 3, and the on-vehicle device is removed from the vehicle body side. In-vehicle equipment can be removed. The holding piece 7 can be easily visually recognized by the exposure concave portion 6e, and the operation of elastically deforming the holding piece 7 by using the tip of a tool or the like can be easily performed.

In the illustrated example, when viewed from the rear side xb, the portion of the holding piece 7 located below the held portion 100f is exposed along with the forming side portion 7f and the thickness side portion 7g of the engaging portion 7a. The tip of a tool or the like is brought into contact with the holding piece 7 from the rear side xb, and the operation of elastically deforming the holding piece 7 can be performed smoothly (see FIG. 9).

Further, in this embodiment, the holding piece 7 is held until at least a part of the formed side surface portion 7f of the engaging portion 7a of the holding piece 7 is flush with the bottom surface portion 6i of the exposure recess portion 6e. When the piece 7 is pressed, the engaging portion 7a is disengaged from the held portion 100f. In the illustrated example, from the state in which the engaging portion 7a of the holding piece 7 is engaged with the held portion 100f of the in-vehicle device (FIG. 15), the forming side portion of the engaging portion 7a of the holding piece 7 immediately below the engaging portion 7a The engagement is released when the holding piece 7 is pushed to a position where the holding piece 7f is flush with the bottom surface portion 6i of the exposure recess 6e (FIG. 16).

In the illustrated example, a rib 6j extending in the vertical direction is formed inside the columnar portion 6 so as to protrude from the outer surface portion 6g toward the inner surface portion 6a. The holding piece 7 can be pressed toward the inner side of the columnar portion 6 to a position where it abuts against the rib 6j (FIG. 16).

Further, in this embodiment, a part of the inner surface of the receiving portion 3 is located between the engaging portion 7a and the base portion 2 and faces the held portion 100f at the receiving end position. It is called regulation section 9.

In the illustrated example, the portion above the exposing recess 6e in the adjacent side surface 6f on the rear side of the columnar portion 6 and behind the free end 7b of the holding piece 7 is a position continuing in the vertical direction. It is a regulation section 9.

The distance between the position restricting portions 9 of the left and right columnar portions 6 is substantially equal to the distance between the side portions 100fa (protruding ends) of the left and right held portions 100f of the in-vehicle device. As a result, the position regulating portion 9 can prevent the vehicle-mounted device from rattling in the left-right direction y without providing a separate structure for preventing the vehicle-mounted device from rattling in the left-right direction y.

Further, in this embodiment, the position regulating portion 9 and the contact surface portion 10 arranged in a direction perpendicular to the position regulating portion 9 and in contact with the held portion 100f from the base portion 2 side. A recess 11 for accommodating a corner 100h of the held portion 100f formed between a side portion 100fa of the held portion 100f facing the position regulating portion 9 and a surface portion 100g in contact with the contact surface portion 10. is forming.

In the illustrated example, a contact surface portion 10 extending in the left-right direction is formed above the position restricting portion 9 on the adjacent side surface portion 6f on the rear side of the columnar portion 6. As shown in FIG.

As a result, in this embodiment, when the engaging portion 7a of the holding piece 7 is engaged with the held portion 100f of the vehicle-mounted device, the surface portion 100g of the held portion 100f, or the held portion 100f in the illustrated example, The upper surface of the portion 100f can be brought into close contact with the contact surface portion 10 to stably hold the in-vehicle device (see FIG. 15).

The provision of elastic deformation characteristics to the portions of the bracket 1 described above that should have the elastic deformation characteristics can be easily ensured by forming the bracket 1 as a molded plastic product.

It goes without saying that the present invention is not limited to the embodiments described above, but includes all embodiments capable of achieving the objects of the present invention.

2 base portion 3 receiving portion 6e recess for exposure 7 holding piece 7a engaging portion 7f formation side portion thickness side portion 7g
100f held portion

Claims (5)

A bracket for holding an in-vehicle device at a predetermined location of a vehicle body, the bracket being formed so as to protrude from the base portion on the side opposite to the fixed side of a base portion fixed to the vehicle body side to hold the in-vehicle device inside. It has a receiving part for receiving and holding,
in the receiving part,
The held portion formed in the in-vehicle device by elastic deformation and elastic recovery at the end position of the receiving portion. a holding piece that engages the engaging portion;
an exposing recess that exposes at least one of two thickness side portions adjacent to the forming side portion of the engaging portion as the inner surface portion of the holding piece between the protruding end of the receiving portion and the base portion; A bracket for in-vehicle equipment, comprising: A virtual first plane including the inner surface portion and a virtual first plane including the adjacent side surface portion in the columnar portion that includes the inner surface portion and the adjacent side surface portion that intersects the inner surface portion and constitutes a part of the receiving portion 2. The in-vehicle device bracket according to claim 1, wherein said exposing concave portion is formed in said columnar portion by removing an imaginary corner portion in contact with said second plane. When the holding piece is pressed to a position where at least part of the side surface portion of the engaging portion of the holding piece is flush with the bottom surface portion of the recess for exposure, the engaging portion with respect to the held portion 3. The in-vehicle equipment bracket according to claim 1, wherein the engagement of the bracket is released. According to any one of claims 1 to 3, a part of the inner surface portion of the receiving portion is formed as a position restricting portion that is located between the engaging portion and the base portion and faces the held portion at the end position of the receiving portion. The bracket for in-vehicle equipment according to any one of claims 1 to 3. The side of the held portion facing the position regulating portion is provided between the position regulating portion and an abutting surface portion disposed in a direction orthogonal to the position regulating portion and in contact with the held portion from the base portion side. 5. The in-vehicle equipment bracket according to claim 4, wherein a recess is formed to accommodate a corner formed between the contact surface portion and the surface portion in contact with the contact surface portion.

Images