Automobile connector

Abstract

The utility model discloses an automobile connector, which comprises a plastic seat and a plurality of terminals arranged in the plastic seat, an upper elastic sheet and a lower elastic sheet which extend backwards and are distributed oppositely are formed on the upper side and the lower side of the front end of each terminal respectively, and a clamping space is formed between each upper elastic sheet and the corresponding lower elastic sheet; the upper sides of the front ends of the terminals are further bent to form cover plates, the front ends of the cover plates are attached to the root portions of the upper elastic pieces in a covering mode, the middle portions and the rear ends of the cover plates are arranged above the upper elastic pieces in a covering mode, and gaps are formed between the middle portions and the rear ends of the cover plates and the upper surfaces of the upper elastic pieces, so that the cover plates cannot affect normal elastic deformation of the upper elastic pieces. The cover plate blocks the root part of the upper elastic sheet so as to form a downward supporting force on the root part of the upper elastic sheet, thereby preventing the upper elastic sheet from inclining towards one side and turning over and deforming, protecting the upper elastic sheet, prolonging the service life of the whole quality, and preventing the upper elastic sheet from being in conductive connection failure at the same time. Therefore, the contact between the upper elastic sheet and the conductor of the paired connector is more stable and more reliable.

Description

Technical fields:

[0001] This utility model relates to the field of connector product technology, and specifically to an automotive connector. Background technology:

[0002] The main supporting fields for connectors include new energy, transportation, communications, networking, IT, medical, home appliances, and military electronic products. The rapid development of product technology and the rapid growth of the market in these supporting fields have strongly driven the development of connector technology. To date, connectors have evolved into a series of specialized products with a complete range of categories, rich specifications, diverse structural types, segmented professional directions, distinct industry characteristics, and standardized systems.

[0003] Combination Figure 1-3 As shown, an automotive connector 1 in the prior art includes a plastic base 11 and a plurality of terminals 12, which are inserted into terminal holes 111 in the plastic base 11.

[0004] The terminal 12 has a non-closed mating frame 120 formed by bending its front end. This mating frame 120 has a guide hole 100 for inserting the conductor of the mating connector. The rear end of the mating frame 120 has an upper spring 121 and a lower spring 122, extending rearward and distributed relative to each other. The ends of both the upper and lower springs 121 and 122 are exposed from the outside inwards behind the guide hole 100, forming a clamping space for the conductor of the mating connector. However, when the conductor of the mating connector passes through the guide hole 100 and contacts the upper spring point 102 of the upper spring 121 and the lower spring point 103 of the lower spring 122, one side of the upper spring 121 is suspended and has no limit to its position. This causes the upper spring 121 to be fixed on one side, making it prone to tilting towards the suspended side under stress, affecting the connection quality. This is the first technical problem.

[0005] The plastic base 11 is also provided with a window 112 that runs from top to bottom through the terminal hole 111. A buckle 101 is provided on the window 112. The plastic base 11 is also formed with an L-shaped pressure arm 13. The end of the pressure arm 13 passes through the window 112 and is pressed into the terminal hole 111, and is fastened and fixed with the buckle 101. The end of the pressure arm 13 is pressed into the terminal 12 and is used to block the terminal 12, thereby preventing the terminal 12 from moving backward relative to the plastic base 11. However, the plastic base 11 and the terminal 12 are only locked and limited once, which makes the terminal anti-retraction function insufficient. There is still a risk that the terminal 12 will move backward relative to the plastic base 11, which is the second technical problem.

[0006] In view of this, the inventor proposes the following technical solution. Utility model content:

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automotive connector.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The automotive connector includes a plastic base and a plurality of terminals disposed in the plastic base. The upper and lower sides of the front end of the terminal are respectively formed with an upper spring sheet and a lower spring sheet that extend backward and are relatively distributed, and a clamping space is formed between the upper spring sheet and the lower spring sheet; the upper side of the front end of the terminal is also bent to form a cover plate for preventing the upper spring sheet from tilting after elastic deformation under force. The front end of the cover plate is attached to the root of the upper spring sheet, and the middle and rear ends of the cover plate are both covered above the upper spring sheet, and a gap is formed between the cover plate and the upper surface of the upper spring sheet.

[0009] Furthermore, in the above technical solution, the front end of the terminal is bent to form a mating frame. The mating frame has a bottom, two sides respectively connected to the two sides of the bottom, and a top connected to one of the sides. A gap is formed between the top and the other side. The front ends of the upper spring and the lower spring are integrally connected to the rear ends of the top and the bottom, respectively, and the part where the front end of the upper spring connects to the rear end of the top serves as the root of the upper spring. One side of the cover plate is integrally connected to the other side, and the front end of the cover plate fits against the upper surface of the top.

[0010] Furthermore, in the above technical solution, the rear end of the cover plate is also bent upward to form an inclined anti-reverse spring. The anti-reverse spring extends from bottom to top into the anti-reverse window provided on the upper part of the plastic seat. When the terminal retracts relative to the plastic seat, the end of the anti-reverse spring abuts against the rear inner wall of the anti-reverse window to achieve the purpose of blocking the retraction.

[0011] Furthermore, in the above technical solution, the plastic seat also has a stop block formed on the front inner wall of the anti-reverse window for blocking and limiting the anti-reverse spring. The stop block has a blocking slope for preventing the anti-reverse spring from flipping. The blocking slope is located above the anti-reverse spring and forms a gap, or the blocking slope is in contact with the upper surface of the anti-reverse spring.

[0012] Furthermore, in the above technical solution, the upper surface of the cover plate has an upwardly protruding convex portion that extends to the end of the anti-reverse spring piece; correspondingly, the upper surface of the cover plate has a groove corresponding to the position of the convex portion that extends to the end of the anti-reverse spring piece.

[0013] Furthermore, in the above technical solution, the width of the protrusion gradually increases from the front end to the rear end.

[0014] Furthermore, in the above technical solution, the plastic base is also provided with a blocking window that runs from top to bottom through the terminal hole, and the inner wall of the blocking window is provided with a buckle; the plastic base is also formed with an L-shaped pressure arm, the end of which passes through the blocking window and is pressed into the terminal hole, and is fastened and fixed with the buckle, and the end of the pressure arm is pressed into the terminal inserted in the terminal hole, so as to prevent the terminal from retracting relative to the plastic base.

[0015] Furthermore, in the above technical solution, both sides of the middle part of the terminal are formed with upwardly extending limiting pieces, one of which extends along its rear side and bends forward to form a baffle that abuts against the rear side of the other limiting piece. The baffle is located on the front side of the end of the pressing arm in the terminal, and the rear end face of the baffle is parallel to the front side of the end of the pressing arm.

[0016] Furthermore, in the above technical solution, the terminal hole is also provided with a first limiting groove and a second limiting groove distributed along its length direction, and the two limiting pieces are respectively inserted into the first limiting groove and the second limiting groove to form a limiting.

[0017] Furthermore, in the above technical solution, a stop groove is also provided in the terminal hole, which connects the rear ends of the first limiting groove and the second limiting groove. The upper end of the stop plate is formed with an upwardly extending stop portion, which is pressed into the stop groove and contacts the inner wall of the stop groove.

[0018] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0019] 1. This utility model has a cover plate formed by bending the upper side of the terminal front end. The cover plate does not affect the normal elastic deformation of the upper spring sheet. When the upper spring sheet is subjected to upward force and undergoes elastic deformation, the cover plate is used to block the root of the upper spring sheet to form a downward support force on the root of the upper spring sheet, so as to prevent the upper spring sheet from tilting to one side and flipping and deforming. This not only protects the upper spring sheet and improves the service life of the entire quality, but also prevents the upper spring sheet from failing to conduct. In this way, it can ensure that the contact between the upper spring sheet and the conductor of the mating connector is more stable and more reliable.

[0020] 2. The anti-reverse elastic force formed by bending the rear end of the cover plate extends into the anti-reverse window provided on the upper part of the plastic base, which can realize a second locking limit for the terminal and increase the holding force of the terminal in the plastic base.

[0021] 3. The stop block provided on the plastic base blocks and limits the anti-reverse spring, thereby preventing the end of the anti-reverse spring from tilting upward and flipping over, thus avoiding the risk of signal interruption due to the terminal continuing to retract. Attached image description:

[0022] Figure 1 This is a 3D view of automotive connectors in the prior art;

[0023] Figure 2 This is a perspective view of the terminals in an automotive connector in the prior art;

[0024] Figure 3 This is a cross-sectional view of an automotive connector in the prior art;

[0025] Figure 4 This is a perspective view of the present invention when the pressure arm is not pressed in;

[0026] Figure 5 This is a perspective view of the present invention when the pressure arm is not pressed in.

[0027] Figure 6 This is an exploded view of this utility model;

[0028] Figure 7 This is a cross-sectional view of the present invention when the pressure arm is not pressed in;

[0029] Figure 8 This is a perspective view of the present invention after the pressure arm has been pressed in;

[0030] Figure 9 This is a cross-sectional view of the present invention after the pressure arm has been pressed in;

[0031] Figure 10 This is a perspective view of the terminal block in this utility model;

[0032] Figure 11 This is a perspective view of the terminal block from another angle in this utility model;

[0033] Figure 12 This is a perspective view of the plastic base in this utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Automotive connector 100 guide hole 101 reverse thread

[0036] 102 Upper ejection point, 103 Lower ejection point, 11 Plastic base

[0037] 111 terminal hole, 112 window, 12 terminals

[0038] 120 docking frame, 121 upper spring, 122 lower spring

[0039] 13 Pressure Arm 2 Plastic Seat 21 Anti-reverse Window

[0040] 211 Rear inner wall 212 Front inner wall 22 Stop block

[0041] 221 Blocking slope 23 Terminal hole 231 First limiting groove

[0042] 232 Second limiting groove 233 Stop groove 24 Blocking window

[0043] 241 inverted 25 pressure arm 3 terminals

[0044] 30 Clamping space 31 Upper spring clip 311 Upper spring clip point

[0045] 32 lower spring clip, 321 lower spring point, 33 docking frame

[0046] 330 Gap 331 Bottom 332 Side

[0047] 333 Top 34 Cover Plate 341 Protrusion

[0048] 342 Groove 35 Anti-reverse spring 36 Limiting plate

[0049] 37 baffle plate 371 baffle section Detailed implementation method:

[0050] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0051] See Figure 4-12 As shown, an automotive connector includes a plastic base 2 and several terminals 3, wherein the terminals 3 are fixed in the plastic base 2 by insertion.

[0052] The plastic base 2 is provided with a plurality of terminal holes 23, and the terminals 3 are inserted into the terminal holes 23 one by one to assemble and position them in the plastic base 2.

[0053] The terminal 3 has an upper spring piece 31 and a lower spring piece 32 that extend backward and are relatively distributed on the upper and lower sides of its front end, respectively, and a clamping space 30 is formed between the upper spring piece 31 and the lower spring piece 32. When the conductor of the mating connector is inserted into the plastic base 2, it is inserted into the clamping space 30 of the terminal 3, and the spring points at the ends of the upper spring piece 31 and the lower spring piece 32 are forced to expand from the inside to the outside to generate elastic deformation, and form an elastic clamping force from the outside to the inside, thereby clamping and fixing the spring points at the ends of the upper spring piece 31 and the lower spring piece 32 to the upper and lower surfaces of the conductor of the mating connector, so as to form a stable electrical connection.

[0054] The upper spring piece 31 and the lower spring piece 32 are both inclined. The upper spring piece 31 is inclined downward from its root and has a downward protruding upper spring point 311 at its end. The lower spring piece 32 is inclined upward from its root and has an upward protruding lower spring point 321 at its end. The lower spring point 321 is distributed opposite to the upper spring point 311 and forms the clamping space 30.

[0055] To prevent the upper spring piece 31 from tilting to one side after undergoing elastic deformation under upward force, the following design is implemented: a cover plate 34 is bent to form the upper side of the front end of the terminal 3. The front end of the cover plate 34 is attached to the root of the upper spring piece 31, and the middle and rear ends of the cover plate 34 are both positioned above the upper spring piece 31, with a gap between the cover plate 34 and the upper surface of the upper spring piece 31. This ensures that the cover plate 34 does not affect the normal elastic deformation of the upper spring piece 31. When the upper spring piece 31 undergoes elastic deformation under upward force, the cover plate 34 blocks the root of the upper spring piece 31, providing downward support to prevent the upper spring piece 31 from tilting to one side and overturning. This not only protects the upper spring piece 31 and improves the overall service life, but also prevents the upper spring piece 31 from failing to conduct. This ensures more stable and reliable contact between the upper spring piece 31 and the conductive body of the mating connector, thus solving the first technical problem mentioned above.

[0056] The terminal 3 is bent at the front end to form a docking frame 33. The docking frame 33 is a non-closed ring, that is, a gap 330 is formed on one side of the upper end of the docking frame 33. The root of the upper spring piece 31 is integrally connected to the rear part of the upper end of the docking frame 33 and close to the gap 330, so that the root of the upper spring piece 31 is a single-sided fixed structure.

[0057] Specifically, the docking frame 33 has a bottom 331, two side portions 332 respectively connected to the two sides of the bottom 331, and a top 333 connected to one of the side portions 332. A gap 330 is formed between the top 333 and the other side portion 332. The front ends of the upper spring piece 31 and the lower spring piece 32 are integrally connected to the rear ends of the top 333 and the bottom 331 respectively. The part where the front end of the upper spring piece 31 is connected to the rear end of the top 333 serves as the root of the upper spring piece 31. One side of the cover plate 34 is integrally connected to the other side portion 332. The front end of the cover plate 34 fits against the upper surface of the top 333 and is attached to the root of the upper spring piece 31 to provide downward support for the root of the upper spring piece 31.

[0058] To prevent the terminal 3 from retracting during the insertion process and affecting the connection effect, the following design is also made: The plastic base 2 is also provided with a blocking window 24 that runs from top to bottom through the terminal hole 23. The inner wall of the blocking window 24 is provided with a buckle 241. The plastic base 2 is also formed with an L-shaped pressure arm 25. The end of the pressure arm 25 passes through the blocking window 24 and is pressed into the terminal hole 23, and is fastened and fixed with the buckle 241, so that the end of the pressure arm 25 is positioned in the terminal hole 23, and the end of the pressure arm 25 is pressed into the terminal 3 inserted in the terminal hole 23, so as to prevent the terminal 3 from retracting relative to the plastic base 2, ensuring the holding force of the terminal 3 in the plastic base 2, so as to achieve a locking limit for the terminal.

[0059] Based on this, the present invention further adds a locking limit to the terminal to form a double locking limit. The specific implementation is as follows:

[0060] The rear end of the cover plate 34 is also bent upward to form an inclined anti-retraction spring 35 with elastic deformation capability. The anti-retraction spring 35 extends upward into the anti-retraction window 21 provided on the upper part of the plastic base 2. When the terminal 3 retracts relative to the plastic base 2, the end of the anti-retraction spring 35 abuts against the rear inner wall 211 of the anti-retraction window 21 to achieve anti-retraction and ensure the holding force of the terminal 3 in the plastic base 2, so as to achieve a second locking limit on the terminal, thereby enabling the plastic base to achieve a second locking limit on the terminal, so as to solve the second technical problem mentioned above. The specific assembly steps are as follows: the anti-retraction window 21 extends from top to bottom through the terminal hole 23. When the terminal 3 is inserted into the terminal hole 23, the anti-retraction spring 35 at the rear end of the cover plate 34 will be compressed first until the anti-retraction spring 35 moves to the anti-retraction window 21. At this time, the anti-retraction spring 35 forms an upward elastic force to press into the anti-retraction window 21 on the upper part of the plastic base 2.

[0061] Furthermore, the plastic base 2 also has a stop block 22 formed on the front inner wall 212 of the anti-reverse window 21 for blocking and limiting the anti-reverse spring 35. When the conductor of the mating connector is inserted into the clamping space 30 and contacts the upper spring 31 and the lower spring 32, it will generate a backward pushing force on the entire terminal. At this time, the entire terminal 3 retracts relative to the plastic base 2. At this time, the end of the anti-reverse spring 35 is squeezed relative to the rear inner wall 211 of the anti-reverse window 21 and tends to tilt upward. The stop block 22 blocks and limits the anti-reverse spring 35, thereby preventing the end of the anti-reverse spring 35 from tilting upward and flipping, thereby preventing the terminal 3 from continuing to retract. At the same time, it can also protect the anti-reverse spring 35, improve product quality, and avoid the risk of the terminal and the conductor of the mating connector failing to connect and thus losing signal.

[0062] Since the anti-reverse spring 35 is tilted, in order to better block and limit the anti-reverse spring 35, the stop block 22 is designed as follows: the stop block 22 has a blocking slope 221 for preventing the anti-reverse spring 35 from flipping. The blocking slope 221 is located above the anti-reverse spring 35 and forms a gap, or the blocking slope 221 is in contact with the upper surface of the anti-reverse spring 35. In this preferred embodiment, the blocking slope 221 is located above the anti-reverse spring 35 and forms a gap. Only after the upper end of the anti-reverse spring 35 is tilted up will the upper surface of the anti-reverse spring 35 contact the blocking slope 221. That is, only at this time will the stop block 22 play a blocking and limiting role for the anti-reverse spring 35, so as to facilitate the installation of the terminal 3 and not affect the installation of the terminal 3.

[0063] The upper surface of the cover plate 34 has an upwardly protruding protrusion 341 that extends to the end of the anti-reverse spring 35. Correspondingly, the upper surface of the cover plate 34 has a groove 342 corresponding to the position of the protrusion 341 that also extends to the end of the anti-reverse spring 35. The design of the protrusion 341 not only increases the strength of the cover plate 34 and the anti-reverse spring 35 at its rear end, preventing the cover plate 34 and the anti-reverse spring 35 from deforming too easily, but also increases the contact area of ​​the anti-reverse spring 35, thereby increasing the holding force between the terminal 3 and the plastic seat 2.

[0064] The width of the protrusion 341 gradually increases from the front end to the rear end, resulting in greater strength and a larger contact area.

[0065] Furthermore, to better prevent the terminal 3 from being blocked by the end of the pressure arm 25, the following design is implemented: Both sides of the middle portion of the terminal 3 are formed with upwardly extending limiting pieces 36. One limiting piece 36 extends along its rear side and bends forward to form a baffle 37 that abuts against the rear side of the other limiting piece 36. This baffle 37 is located in front of the end of the pressure arm 25 pressed into the terminal 3, and its rear end face is parallel to the front side of the end of the pressure arm 25. When the terminal 3 retracts relative to the plastic base 2, the rear end face of the baffle 37 directly abuts against the front side of the end of the pressure arm 25, providing a large contact area and creating an excellent blocking effect, effectively preventing the terminal 3 from retracting. The baffle 37 also abuts against the rear side of the other limiting piece 36, which supports the baffle 37, making its structure more stable and preventing displacement, thus further enhancing the effect of preventing the terminal 3 from retracting.

[0066] To make the assembly structure of terminal 3 and plastic base 2 more stable, the following design is also made: a first limiting groove 231 and a second limiting groove 232 distributed along its length are provided in the terminal hole 23. Two limiting pieces 36 are respectively inserted into the first limiting groove 231 and the second limiting groove 232 to form a limit, thereby ensuring that the assembly structure of terminal 3 and plastic base 2 is more stable and improving product quality.

[0067] The terminal hole 23 is also provided with a retaining groove 233 that connects the rear ends of the first limiting groove 231 and the second limiting groove 232. The upper end of the retaining plate 37 is formed with an upwardly extending retaining part 371. The retaining part 371 is pressed into the retaining groove 233 and contacts the inner wall of the retaining groove 233. It can prevent the terminal 3 from being over-inserted during the process of inserting the terminal 3 into the terminal hole 23, thereby preventing the terminal 3 from being damaged during the insertion process and improving the quality of the connector.

[0068] In summary, this utility model features a cover plate 34 formed by bending the upper side of the front end of the terminal 3. This cover plate 34 does not affect the normal elastic deformation of the upper spring piece 31. When the upper spring piece 31 undergoes upward elastic deformation under force, the cover plate 34 blocks the root of the upper spring piece 31, providing downward support to prevent it from tilting to one side and overturning. This not only protects the upper spring piece 31 and improves its overall service life, but also prevents conductive failure, ensuring more stable and reliable contact between the upper spring piece 31 and the conductive body of the mating connector. The anti-retraction elastic force 35 formed by bending the rear end of the cover plate 34 extends into the anti-retraction window 21 provided on the upper part of the plastic base 2, providing a second locking limit for the terminal and increasing the holding force of the terminal within the plastic base 2. The stop block 22 provided on the plastic base 2 blocks and limits the anti-reverse spring 35, thereby preventing the end of the anti-reverse spring 35 from tilting upward and flipping over, thus avoiding the risk of signal interruption due to the terminal 3 continuing to retract.

[0069] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. An automotive connector, comprising a plastic base and a plurality of terminals disposed in the plastic base, wherein upper and lower springs extending rearward and distributed opposite to each other are respectively formed on the upper and lower front sides of the terminals, and a clamping space is formed between the upper and lower springs. Its features are: The upper side of the front end of the terminal is also bent to form a cover plate to prevent tilting after the upper spring sheet undergoes elastic deformation under force. The front end of the cover plate is attached to the root of the upper spring sheet, and the middle and rear ends of the cover plate are both placed above the upper spring sheet, with a gap between them and the upper surface of the upper spring sheet.

2. The automotive connector according to claim 1, characterized in that: The terminal front end is bent to form a mating frame. The mating frame has a bottom, two sides respectively connected to the two sides of the bottom, and a top connected to one of the sides. A gap is formed between the top and the other side. The front ends of the upper spring and the lower spring are integrally connected to the rear ends of the top and the bottom, respectively. The part where the front end of the upper spring connects to the rear end of the top serves as the root of the upper spring. One side of the cover plate is integrally connected to the other side, and the front end of the cover plate fits against the upper surface of the top.

3. The automotive connector according to claim 1, characterized in that: The rear end of the cover plate is also bent upward to form an inclined anti-reverse spring. The anti-reverse spring extends from bottom to top into the anti-reverse window provided on the upper part of the plastic base. When the terminal retracts relative to the plastic base, the end of the anti-reverse spring abuts against the rear inner wall of the anti-reverse window to achieve the purpose of blocking the retraction.

4. The automotive connector according to claim 3, characterized in that: The plastic seat also has a stop block formed on the front inner wall of the anti-reverse window for blocking and limiting the anti-reverse spring. The stop block has a blocking slope for preventing the anti-reverse spring from flipping. The blocking slope is located above the anti-reverse spring and forms a gap, or the blocking slope is in contact with the upper surface of the anti-reverse spring.

5. The automotive connector according to claim 3, characterized in that: The upper surface of the cover plate has an upwardly protruding convex portion that extends to the end of the anti-reverse spring; correspondingly, the upper surface of the cover plate has a groove corresponding to the position of the convex portion that extends to the end of the anti-reverse spring.

6. The automotive connector according to claim 5, characterized in that: The width of the protrusion gradually increases from the front end to the rear end.

7. The automotive connector according to any one of claims 1-6, characterized in that: The plastic base is also provided with a blocking window that runs from top to bottom through the terminal hole. The inner wall of the blocking window is provided with a buckle. The plastic base is also formed with an L-shaped pressure arm. The end of the pressure arm passes through the blocking window and is pressed into the terminal hole, and is fastened and fixed with the buckle. The end of the pressure arm is pressed into the terminal inserted in the terminal hole so that the terminal is blocked from moving backward relative to the plastic base.

8. The automotive connector according to claim 7, characterized in that: Both sides of the middle portion of the terminal are formed with upwardly extending limiting pieces. One of the limiting pieces extends along its rear side and bends forward to form a baffle that abuts against the rear side of the other limiting piece. The baffle is located in front of the end of the pressing arm in the terminal, and the rear end face of the baffle is parallel to the front side face of the end of the pressing arm.

9. The automotive connector according to claim 8, characterized in that: The terminal hole is also provided with a first limiting groove and a second limiting groove distributed along its length direction. The two limiting pieces are respectively inserted into the first limiting groove and the second limiting groove to form a limiting.

10. The automotive connector according to claim 9, characterized in that: The terminal hole is also provided with a stop groove that connects the rear ends of the first limiting groove and the second limiting groove. The upper end of the stop plate is formed with an upwardly extending stop part, which is pressed into the stop groove and contacts the inner wall of the stop groove.

Images