A vehicle headlamp service life test apparatus

CN224788915UActive Publication Date: 2026-09-22CHONGQING AOFANG AUTO PARTS CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202522265966.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-10-27
Publication Date
2026-09-22
Estimated Expiration
2035-10-27

AI Technical Summary

Technical Problem

[0004]针对现有技术存在的问题,本实用新型提供了一种汽车车灯使用寿命测试设备,具备方便调节隔板的优点,解决了现有的高低温试验箱在使用时,通常需要将被检测物体放置在隔板的顶部,对不同尺寸的检测物体进行检测时,则需要进行调节隔板的位置,而隔板在调节时,通常需要先将隔板取下,再将用于支撑隔板的支撑块从卡槽内取出,并把支撑块插入合适高度的卡槽内,最后把隔板放到支撑块的顶部,调节的过程较为费时费力,进而影响了检测效率的问题

Benefits of technology

[0013]1、本实用新型通过设置隔板、滑轨、支撑板、滑块、固定箱、固定装置、传动装置、控制组件、固定槽、限位槽和限位块的配合使用,解决了现有的高低温试验箱在使用时,通常需要将被检测物体放置在隔板的顶部,对不同尺寸的检测物体进行检测时,则需要进行调节隔板的位置,而隔板在调节时,通常需要先将隔板取下,再将用于支撑隔板的支撑块从卡槽内取出,并把支撑块插入合适高度的卡槽内,最后把隔板放到支撑块的顶部,调节的过程较为费时费力,进而影响了检测效率的问题。

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224788915U_ABST
    Figure CN224788915U_ABST
Patent Text Reader

Abstract

The utility model discloses a kind of automobile car light service life test equipment, including high-low temperature test box, the inner chamber of high-low temperature test box is provided with two baffle, the both sides of high-low temperature test box inner wall left side and right side are all fixedly connected with slide rail.The utility model is through the cooperation of baffle, slide rail, support plate, sliding block, fixed box, fixing device, transmission, control component, fixed groove, limit groove and limit block, solve the high-low temperature test box of existing when using, usually need to be detected object is placed in the top of baffle, when detecting different size detection object, then need to adjust the position of baffle, and baffle when adjusting, usually need to be detected object is placed in the top of baffle first, then support block for supporting baffle is taken out from clamping groove, and support block is inserted into the clamping groove of suitable height, finally baffle is placed on the top of support block, the process of adjusting is relatively time-consuming and laborious, and then the problem of affecting detection efficiency.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model belongs to the field of automotive headlight testing technology, and in particular relates to an automotive headlight lifespan testing device. Background Technology

[0002] High and low temperature test chambers are a type of automotive headlight lifespan testing equipment. They can simulate different temperature environments and conduct long-term tests on automotive headlights under conditions such as high temperature, low temperature, and alternating high and low temperatures. The test chambers observe the performance changes of headlights and the aging of components under different temperature conditions, thereby evaluating the reliability and lifespan of headlights in various temperature environments that they may face in actual use.

[0003] The problem with existing technology is that, when using existing high and low temperature test chambers, the object to be tested usually needs to be placed on top of the partition. When testing objects of different sizes, the position of the partition needs to be adjusted. However, when adjusting the partition, it is usually necessary to first remove the partition, then take out the support block used to support the partition from the slot, insert the support block into the slot at the appropriate height, and finally put the partition on top of the support block. The adjustment process is time-consuming and laborious, which affects the testing efficiency. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides an automotive headlight lifespan testing device with the advantage of conveniently adjustable partitions. This solves the problem that existing high and low temperature test chambers typically require the object to be tested to be placed on top of the partition. When testing objects of different sizes, the position of the partition needs to be adjusted. However, adjusting the partition usually requires first removing the partition, then taking out the support block used to support the partition from its slot, inserting the support block into a slot at the appropriate height, and finally placing the partition on top of the support block. This adjustment process is time-consuming and labor-intensive, thus affecting testing efficiency.

[0005] This utility model is implemented as follows: an automotive headlight lifespan testing device includes a high and low temperature test chamber. The chamber has two partitions inside. Slide rails are fixedly connected to the left and right sides of the chamber's inner wall. Support plates are provided on the left and right sides of the partitions. Slider blocks are fixedly connected to the front and rear sides of opposite sides of the two support plates. A fixed box is fixedly connected to the top center of the support plates. A fixing device is provided at the bottom of the fixed box's inner cavity. A transmission device cooperating with the fixing device is provided at the top of the fixed box's inner cavity. A control component cooperating with the transmission device is provided on the front side of the fixed box. Fixing grooves cooperating with the fixing device are provided in the middle of the left and right sides of the chamber's inner wall. Limiting grooves cooperating with the transmission device are provided at the top of the left and right sides of the fixed box's inner wall. A limiting block cooperating with the control component is fixedly connected to the front side of the top of the support plates.

[0006] In a preferred embodiment of this invention, the fixing device includes two sliding columns, a spring, and a sliding plate. The two sliding columns are respectively disposed on the front and rear sides of the bottom of the inner cavity of the fixing box, and both ends are fixedly connected to the inner wall of the fixing box. The spring is sleeved on the surface of the sliding column, and its left and right sides are fixedly connected to the sliding plate and the inner wall of the fixing box, respectively. The front and rear sides of the sliding plate are sleeved on the surface of the sliding column and are slidably connected to the sliding column through a linear bearing. A fixing block is fixedly connected to the left side of the sliding plate. The left side of the fixing block penetrates the fixing box and extends into the inner cavity of the fixing groove, contacting the inner wall of the fixing groove. The top of the left side of the fixing block is an inclined surface. A pressing column is fixedly connected to the middle of the top of the sliding plate.

[0007] As a preferred embodiment of this utility model, the transmission device includes a movable plate, and support blocks are fixedly connected to the left and right sides of the movable plate. The side of the support block away from the movable plate passes through the limiting groove and extends into the inner cavity of the limiting groove to contact the inner wall of the limiting groove. A pressing hole is opened at the bottom of the movable plate, and the pressing hole is inclined. The top of the pressing column passes through the pressing hole and extends into the inner cavity of the pressing hole to contact the inner wall of the pressing hole.

[0008] In a preferred embodiment of this invention, the control component includes a wire rope and a pull ring. The rear side of the wire rope passes through the fixed box and extends into the inner cavity of the fixed box to be fixedly connected to the moving plate. The front side of the wire rope passes through the limiting block and extends to the front side of the limiting block to be fixedly connected to the pull ring.

[0009] In a preferred embodiment of this invention, the left side of the slider passes through the slide rail and extends into the inner cavity of the slide rail, contacting the inner wall of the slide rail.

[0010] As a preferred embodiment of this invention, the number of fixing slots is multiple, and they are evenly distributed in a linear array in the middle of the left and right sides of the inner wall of the high and low temperature test chamber.

[0011] As a preferred embodiment of this utility model, the support plate has a groove on the side near the partition, and the left and right sides of the partition pass through the groove and extend into the inner cavity of the groove to contact the inner wall of the groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model solves the problem of existing high and low temperature test chambers, which typically require the object to be tested to be placed on top of the partition during use. When testing objects of different sizes, the position of the partition needs to be adjusted. However, the adjustment process usually requires removing the partition, taking out the support block used to support the partition from the slot, inserting the support block into the slot at the appropriate height, and finally placing the partition on top of the support block. This adjustment process is time-consuming and labor-intensive, thus affecting the testing efficiency.

[0014] 2. This utility model, by setting a fixing device, can fix the position of the support plate, and thus fix the position of the partition. By setting a sliding column, the spring and the sliding plate can be limited. By setting a spring, the rebound force released after compression can push the sliding plate and the fixing block to move in the opposite direction and reset. By setting a sliding plate, the fixing block can be moved. By setting a fixing block, the position of the support plate can be fixed, and thus fix the position of the partition. By setting a pressing column, the sliding plate can be moved.

[0015] 3. This utility model can play a transmission role for the fixed device by setting a transmission device. By setting a moving plate and a pressing hole, the pressing column can be pressed through the pressing hole during the movement of the moving plate, and the pressing column can be pushed to move. By setting a support block, the moving plate can be limited.

[0016] 4. This utility model, by setting up a control component, can control the fixing device, making it convenient for users to adjust the position of the partition downwards. By setting up a pull ring and a steel wire rope, when the user pulls the pull ring, the moving plate will be moved forward through the steel wire rope, and the squeezing column will be squeezed through the squeezing hole. This will push the squeezing column, the moving plate and the fixing block to move synchronously, so that the fixing block will disengage from the inner cavity of the fixing groove and no longer fix the position of the partition.

[0017] 5. By setting sliders and slide rails, this utility model can limit the position of the support plate, making it convenient for the support plate and partition to move.

[0018] 6. By setting multiple fixing slots, this utility model enables the fixing device to fix the partition in different positions, thereby adjusting the position of the partition.

[0019] 7. This utility model can support the partition by setting a support plate and a sliding groove, and the partition can also move along the sliding groove, making it convenient for users to remove the partition. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure provided in an embodiment of the present utility model;

[0021] Figure 2 This is a three-dimensional structural diagram of the slide rail and support plate provided in this embodiment of the utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of the control component provided in an embodiment of the present utility model;

[0023] Figure 4 This is a partial sectional view of the fixing box provided in an embodiment of the present utility model;

[0024] Figure 5 This is a three-dimensional structural diagram of the fixing device and transmission device provided in the embodiment of this utility model.

[0025] In the diagram: 1. High and low temperature test chamber; 2. Partition plate; 3. Slide rail; 4. Support plate; 5. Slider; 6. Fixed box; 7. Fixing device; 8. Transmission device; 9. Control component; 10. Fixed groove; 11. Limiting groove; 12. Limiting block; 13. Slide groove; 701. Sliding column; 702. Spring; 703. Sliding plate; 704. Fixed block; 705. Extrusion column; 801. Moving plate; 802. Support block; 803. Extrusion hole; 901. Steel wire rope; 902. Pull ring. Detailed Implementation

[0026] To further understand the invention content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0027] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0028] like Figures 1 to 5As shown in the figure, an embodiment of the present invention provides an automotive headlight lifespan testing device, including a high and low temperature test chamber 1. The inner cavity of the high and low temperature test chamber 1 is provided with two partitions 2. Slide rails 3 are fixedly connected to both the left and right sides of the inner wall of the high and low temperature test chamber 1. Support plates 4 are provided on both the left and right sides of the partitions 2. Slider blocks 5 are fixedly connected to the front and rear sides of the opposite side of the two support plates 4. A fixed box 6 is fixedly connected to the middle of the top of the support plate 4. A fixing device 7 is provided at the bottom of the inner cavity of the fixed box 6. A transmission device 8 that works with the fixing device 7 is provided at the top of the inner cavity of the fixed box 6. A control component 9 that works with the transmission device 8 is provided on the front side of the fixed box 6. Fixing grooves 10 that work with the fixing device 7 are opened in the middle of both the left and right sides of the inner wall of the high and low temperature test chamber 1. Limiting grooves 11 that work with the transmission device 8 are opened at the top of both the left and right sides of the inner wall of the fixed box 6. A limiting block 12 that works with the control component 9 is fixedly connected to the front side of the top of the support plate 4.

[0029] refer to Figure 1 , Figure 4 and Figure 5 The fixing device 7 includes two sliding columns 701, a spring 702, and a sliding plate 703. The two sliding columns 701 are respectively disposed on the front and rear sides of the bottom of the inner cavity of the fixing box 6, and both ends are fixedly connected to the inner wall of the fixing box 6. The spring 702 is sleeved on the surface of the sliding column 701, and its left and right sides are fixedly connected to the sliding plate 703 and the inner wall of the fixing box 6, respectively. The front and rear sides of the sliding plate 703 are sleeved on the surface of the sliding column 701, and are slidably connected to the sliding column 701 through a linear bearing. A fixing block 704 is fixedly connected to the left side of the sliding plate 703. The left side of the fixing block 704 penetrates the fixing box 6 and extends into the inner cavity of the fixing groove 10 to contact the inner wall of the fixing groove 10. The top of the left side of the fixing block 704 is a slope. A pressing column 705 is fixedly connected to the middle of the top of the sliding plate 703.

[0030] The above solution is as follows: by setting the fixing device 7, the position of the support plate 4 can be fixed, thereby fixing the position of the partition 2; by setting the sliding column 701, the spring 702 and the sliding plate 703 can be limited; by setting the spring 702, the rebound force released after compression can push the sliding plate 703 and the fixing block 704 to move in the opposite direction and reset; by setting the sliding plate 703, the fixing block 704 can be moved; by setting the fixing block 704, the position of the support plate 4 can be fixed, thereby fixing the position of the partition 2; by setting the compression column 705, the sliding plate 703 can be moved.

[0031] refer to Figure 4 and Figure 5The transmission device 8 includes a movable plate 801. Support blocks 802 are fixedly connected to the left and right sides of the movable plate 801. The side of the support block 802 away from the movable plate 801 passes through the limiting groove 11 and extends into the inner cavity of the limiting groove 11 to contact the inner wall of the limiting groove 11. A pressing hole 803 is opened at the bottom of the movable plate 801, and the pressing hole 803 is inclined. The top of the pressing column 705 passes through the pressing hole 803 and extends into the inner cavity of the pressing hole 803 to contact the inner wall of the pressing hole 803.

[0032] The above solution is adopted as follows: by setting the transmission device 8, the fixed device 7 can be driven; by setting the moving plate 801 and the extrusion hole 803, the extrusion column 705 can be extruded through the extrusion hole 803 during the movement of the moving plate 801, and the extrusion column 705 can be pushed to move; by setting the support block 802, the moving plate 801 can be limited.

[0033] refer to Figure 3 and Figure 4 The control component 9 includes a wire rope 901 and a pull ring 902. The rear side of the wire rope 901 passes through the fixed box 6 and extends into the inner cavity of the fixed box 6 to be fixedly connected to the moving plate 801. The front side of the wire rope 901 passes through the limiting block 12 and extends into the front side of the limiting block 12 to be fixedly connected to the pull ring 902.

[0034] The above solution is adopted: by setting the control component 9, the fixing device 7 can be controlled, making it convenient for the user to adjust the position of the partition 2 downward. By setting the pull ring 902 and the wire rope 901, when the user pulls the pull ring 902, the moving plate 801 will be moved forward through the wire rope 901, and the pressing column 705 will be pressed through the pressing hole 803. This will push the pressing column 705, the moving plate 801 and the fixing block 704 to move synchronously, so that the fixing block 704 will disengage from the inner cavity of the fixing groove 10 and no longer fix the position of the partition 2.

[0035] refer to Figure 2 The left side of slider 5 passes through slide rail 3 and extends into the inner cavity of slide rail 3, contacting the inner wall of slide rail 3.

[0036] By adopting the above scheme, the support plate 4 can be limited by setting the slider 5 and the slide rail 3, which facilitates the movement of the support plate 4 and the partition 2.

[0037] refer to Figure 1 There are multiple fixed slots 10, which are evenly distributed in a linear array in the middle of the left and right sides of the inner wall of the high and low temperature test chamber 1.

[0038] By adopting the above solution, by setting multiple fixing slots 10, the fixing device 7 can fix the partition 2 in different positions, thereby adjusting the position of the partition 2.

[0039] refer to Figure 2 and Figure 3 The support plate 4 has a groove 13 on the side near the partition 2. The left and right sides of the partition 2 pass through the groove 13 and extend into the inner cavity of the groove 13 to contact the inner wall of the groove 13.

[0040] The above solution is adopted: by setting the support plate 4 and the slide 13, the partition 2 can be supported, and the partition 2 can also move along the slide 13, which makes it convenient for the user to take out the partition 2.

[0041] The working principle of this utility model:

[0042] When the position of the partition 2 needs to be adjusted upwards, the operator can directly push the partition 2, causing the support plate 4 to move upwards synchronously. During the upward movement of the support plate 4, the fixing device 7 and transmission device 8 inside the fixed box 6, along with the control component 9 on the front side of the fixed box 6, will move upwards synchronously with the support plate 4. During the upward movement of the fixing device 7, the inclined surface of its fixing block 704 will contact the fixing groove 10 and generate pressure. The pressure generated at this time will force the fixing block 704 to retract into the inner cavity of the fixed box 6, so that the fixing groove 10 is no longer inserted into the inner cavity of the fixing groove 10. The operator can then move the partition 2 upwards. At the same time, during the retraction of the fixing block 704, it will drive the sliding plate 703 to move on the surface of the sliding column 701 and compress the spring 702. The sliding plate 703 will drive the extrusion column 705 into the inner cavity of the extrusion hole 803. During the horizontal movement of the extrusion column 705, it will contact the inclined surface of the extrusion hole 803 and generate extrusion. The extrusion force generated at this time will force the moving plate 801 to move forward, and the wire rope 901 will move forward with the moving plate 801. When the partition 2 moves to the appropriate position, the movement of the partition 2 will stop, and the position of the fixing block 704 will correspond to the position of the fixing groove 10. The fixing block 704 will no longer be extruded, and the rebound force released after the spring 702 is extruded will push the sliding plate 703 and the fixing block 704 to move in opposite directions synchronously, so that the fixing block 704 is inserted into the inner cavity of the fixing groove 10 again to fix the position of the partition 2. At the same time, during the reverse movement, the sliding plate 703 will drive the moving plate 801 and the wire rope 901 to move backward and reset through the extrusion column 705, completing the upward adjustment.

[0043] When the position of partition 2 needs to be adjusted downwards, the operator hooks the two pull rings 902 with their fingers and pulls them forward. The two pull rings 902 will drive the moving plate 801 to move forward synchronously through the wire rope 901. During the forward movement, the moving plate 801 will squeeze the squeezing column 705 through the squeezing hole 803. The squeezing force generated at this time will push the squeezing column 705 to move. The squeezing column 705 will drive the sliding plate 703 and the fixed block 704 to move synchronously, and squeeze the spring 702, causing the fixed block 704 to disengage from the inner cavity of the fixed groove 10. At this time, partition 2... Once the partition is no longer in a fixed position, the operator can move the partition 2 downwards to adjust its position. After the partition 2 reaches the appropriate position, the operator releases the pull ring 902. At the same time, the spring 702 is no longer compressed. The rebound force released after the spring 702 is compressed will push the fixing block 704 and the sliding plate 703 to reset, causing the fixing block 704 to re-enter the inner cavity of the fixing groove 10 to fix the position of the partition 2. Meanwhile, the sliding plate 703 will drive the moving plate 801, the wire rope 901 and the pull ring 902 to reset through the pressing column 705, completing the downward adjustment.

[0044] In summary, this automotive headlight lifespan testing equipment, through the coordinated use of a partition 2, slide rail 3, support plate 4, slider 5, fixed box 6, fixing device 7, transmission device 8, control component 9, fixing groove 10, limiting groove 11, and limiting block 12, solves the problem that existing high and low temperature test chambers typically require the object to be tested to be placed on top of the partition. When testing objects of different sizes, the position of the partition needs to be adjusted. However, adjusting the partition usually requires first removing the partition, then taking out the support block used to support the partition from the slot, inserting the support block into the slot at the appropriate height, and finally placing the partition on top of the support block. This adjustment process is time-consuming and labor-intensive, thus affecting the testing efficiency.

[0045] It should be noted that the high and low temperature test chamber is a device or equipment that exists in the prior art, or a device or equipment that can be implemented by the prior art, and the specific composition and principle of the power supply of the high and low temperature test chamber are clear to those skilled in the art, so they will not be described in detail.

[0046] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for testing the service life of automotive headlights, comprising a high and low temperature test chamber (1), characterized in that: The high and low temperature test chamber (1) has two partitions (2) in its inner cavity. Slide rails (3) are fixedly connected to both the left and right sides of the inner wall of the high and low temperature test chamber (1). Support plates (4) are provided on both the left and right sides of the partitions (2). Slider blocks (5) are fixedly connected to the front and rear sides of the opposite side of the two support plates (4). A fixed box (6) is fixedly connected to the middle of the top of the support plate (4). A fixing device (7) is provided at the bottom of the inner cavity of the fixed box (6). A fixing device (7) is provided at the top of the inner cavity of the fixed box (6). The device (7) is used in conjunction with the transmission device (8). The front side of the fixed box (6) is provided with a control component (9) used in conjunction with the transmission device (8). The middle of the left and right sides of the inner wall of the high and low temperature test chamber (1) is provided with a fixing groove (10) used in conjunction with the fixing device (7). The top of the left and right sides of the inner wall of the fixed box (6) is provided with a limiting groove (11) used in conjunction with the transmission device (8). The front side of the top of the support plate (4) is fixedly connected with a limiting block (12) used in conjunction with the control component (9).

2. The automotive headlight lifespan testing device as described in claim 1, characterized in that: The fixing device (7) includes two sliding columns (701), a spring (702), and a sliding plate (703). The two sliding columns (701) are respectively located on the front and rear sides of the bottom of the inner cavity of the fixing box (6), and both ends are fixedly connected to the inner wall of the fixing box (6). The spring (702) is sleeved on the surface of the sliding column (701), and its left and right sides are fixedly connected to the sliding plate (703) and the inner wall of the fixing box (6), respectively. The front side of the sliding plate (703) and the rear side of the sliding column (701) are fixedly connected to the inner wall of the fixing box (6). The rear side is fitted onto the surface of the sliding column (701) and is slidably connected to the sliding column (701) via a linear bearing. A fixing block (704) is fixedly connected to the left side of the sliding plate (703). The left side of the fixing block (704) penetrates the fixing box (6) and extends to the inner cavity of the fixing groove (10) to contact the inner wall of the fixing groove (10). The top of the left side of the fixing block (704) is an inclined surface. A pressing column (705) is fixedly connected to the middle of the top of the sliding plate (703).

3. The automotive headlight lifespan testing device as described in claim 2, characterized in that: The transmission device (8) includes a movable plate (801), and support blocks (802) are fixedly connected to the left and right sides of the movable plate (801). The side of the support block (802) away from the movable plate (801) passes through the limiting groove (11) and extends into the inner cavity of the limiting groove (11) to contact the inner wall of the limiting groove (11). The bottom of the movable plate (801) is provided with a pressing hole (803), and the pressing hole (803) is inclined. The top of the pressing column (705) passes through the pressing hole (803) and extends into the inner cavity of the pressing hole (803) to contact the inner wall of the pressing hole (803).

4. The automotive headlight lifespan testing device as described in claim 3, characterized in that: The control component (9) includes a wire rope (901) and a pull ring (902). The rear side of the wire rope (901) passes through the fixed box (6) and extends into the inner cavity of the fixed box (6) to be fixedly connected to the moving plate (801). The front side of the wire rope (901) passes through the limiting block (12) and extends into the front side of the limiting block (12) to be fixedly connected to the pull ring (902).

5. The automotive headlight lifespan testing device as described in claim 1, characterized in that: The left side of the slider (5) passes through the slide rail (3) and extends into the inner cavity of the slide rail (3) to contact the inner wall of the slide rail (3).

6. The automotive headlight lifespan testing device as described in claim 1, characterized in that: The number of fixed grooves (10) is multiple, and they are evenly distributed in a linear array in the middle of the left and right sides of the inner wall of the high and low temperature test chamber (1).

7. The automotive headlight lifespan testing device as described in claim 1, characterized in that: The support plate (4) has a groove (13) on the side near the partition (2). The left and right sides of the partition (2) pass through the groove (13) and extend to the inner cavity of the groove (13) to contact the inner wall of the groove (13).