Connection terminal, connection terminal seat and key switch

Abstract

The utility model provides a connecting terminal, a connecting terminal seat and a key switch, and belongs to the technical field of electronic equipment. According to the utility model, the second elastic unit is additionally arranged at the tail end of the first elastic unit, so that the extension of the elastic arm is realized, and the overall elasticity of the elastic arm can be increased; and the first elastic unit and the second elastic unit can play a role in contact and conduction, so that a double-path parallel structural design is formed, and the reliability of the system is improved.

Description

[Technical Field]

[0001] This utility model belongs to the field of electronic equipment technology, specifically relating to a connection terminal, a connection terminal block, and a push-button switch. [Background Technology]

[0002] As a core component of the keyboard, the push-button switch converts the user's pressing force into an electrical signal, generating the corresponding input. The push-button switch needs to be connected to the PCB board via connectors to enable the conduction of electrical signals.

[0003] In related technologies, the connecting terminal is typically soldered to the PCB board at one end, and a flexible component is installed at the other end. The push-button switch is inserted into the flexible component via a guide pin, enabling hot-swapping between the push-button switch and the connecting terminal. The flexible component generally includes two U-shaped spring arms spaced apart to form a joint. The guide pin is inserted into the joint and contacts the U-shaped spring arms. Due to the short length of the spring arms, this type of flexible component usually has the problem of weak elasticity. After prolonged use, the spring arms are prone to plastic deformation and loss of rebound, affecting the conduction of electrical signals.

[0004] Therefore, it is necessary to provide a connection terminal, a connection terminal block, and a push-button switch to solve the problems mentioned in the background art. [Utility Model Content]

[0005] This invention addresses the problem of weak elasticity in the elastic arm of existing elastic components by adding a second elastic unit at the end of the first elastic unit, thereby lengthening the elastic arm and increasing its overall elasticity. Furthermore, both the first and second elastic units can serve as contact and conduction mechanisms, forming a dual-path parallel structure design that improves the reliability of the system.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] A connecting terminal for connecting a first structural member and a second structural member, the connecting terminal comprising:

[0008] Main body;

[0009] A welding section, which is connected to the main body and welded to the first structural member;

[0010] The snap-fit ​​portion is connected to the main body portion and detachably connected to the second structural member. The snap-fit ​​portion includes two spaced elastic components. Each elastic component includes a first elastic unit connected to the main body portion and a second elastic unit connected to the first elastic unit and extending in a direction away from the first elastic unit.

[0011] The first elastic units of the two elastic components are spaced apart to form a first insertion seam, and the second elastic units of the two elastic components are spaced apart to form a second insertion seam. The first insertion seam and the second insertion seam are interconnected to form an insertion part. The second structural member is inserted into the insertion part and contacts the first elastic unit and / or the second elastic unit. The second insertion seam is located above the first insertion seam.

[0012] As a preferred improvement, the second elastic element protrudes entirely from the first elastic element.

[0013] As a preferred improvement, each of the first elastic units includes a first elastic arm, a second elastic arm spaced apart from and facing the first elastic arm, and a first connecting arm that bends and extends from the first elastic arm and connects to the second elastic arm. The first elastic arm is connected to the main body, and the second elastic arms of the two first elastic units are spaced apart to form the first insertion seam.

[0014] As a preferred improvement, each of the second elastic units includes a third elastic arm extending from the second elastic arm in a direction away from the first elastic unit, a second connecting arm extending from the third elastic arm in a direction bent toward the first elastic unit, and a fourth elastic arm extending from the second connecting arm toward the first elastic unit, the fourth elastic arm being suspended and spaced apart from the third elastic arm; the third elastic arms of the two second elastic units are spaced apart to form the second insertion seam.

[0015] As a preferred improvement, the main body includes a base plate and two side plates that bend and extend away from the base plate from opposite sides. Each first elastic arm is connected to the side plate, and each side plate corresponds to a first elastic unit. The first insertion seam and the second insertion seam are both located between the extended surfaces of the two side plates.

[0016] As a preferred improvement, the two third spring arms extend from the second spring arms toward each other, and the cross-section of the second interlocking joint gradually decreases from the second spring arms toward the direction away from the first interlocking joint.

[0017] As a preferred improvement, the welding part includes two pads, each pad is connected to the side plate at one end and suspended at the other end, the suspended ends of the two pads are spaced apart to form a gap, and the end face of the suspended end of each pad is recessed in a direction away from the gap to form a pad groove, and the extension surface of the gap is aligned with the first insertion seam.

[0018] A connector terminal block includes the aforementioned connector terminal and a connector terminal block for encapsulating the connector terminal. The connector terminal block has a first mounting hole, a first slot communicating with the first mounting hole, and a boss extending toward a second structural member. A second mounting hole is provided in the boss. The first slot is located outside the first mounting hole. The second mounting hole communicates with the first mounting hole. The snap-fit ​​portion is suspended in the first mounting hole and spaced from the hole wall of the first mounting hole. The main body portion is snapped into the first slot. The solder portion is exposed outside the connector terminal block.

[0019] As a preferred improvement, the connecting terminal block is further provided with a support block, which divides the first slot into two sub-slots with a gap, and the two side plates are respectively snapped into the two sub-slots; the main body is also provided with a through hole, and the support block is provided with a first snap block, which is snapped into the snap hole to achieve fixation.

[0020] A push-button switch includes a PCB board, the aforementioned connecting terminal block, and a pressing module. The pressing module is disposed above the PCB board, and the connecting terminal block is disposed below the PCB board. The PCB board has a through hole corresponding to the position of the boss. The boss is installed in the through hole. The connecting terminal block is welded to the PCB board through the welding part. The pressing module has guide pins that can be plugged in and connected to the through hole and the boss and the snap-fit ​​part.

[0021] The beneficial effects of this utility model are as follows:

[0022] (1) The second elastic unit can be regarded as an "extension" of the first elastic unit, so that the elastic component can obtain greater freedom and thus obtain better elasticity;

[0023] (2) The first elastic unit and the second elastic unit extend in different directions, making better use of space and making the connection terminal structure compact, which meets the development needs of miniaturization.

[0024] (3) The first elastic unit and the second elastic unit are parallel to form a superimposed design for plug-in function. When either one loses its elastic function and cannot make contact and conduction, the other can still play its elastic function to maintain good contact, which improves the reliability of the system. [Attached Image Description]

[0025] Figure 1 A three-dimensional structural diagram showing one angle of the connecting terminal in Embodiment 1;

[0026] Figure 2 A perspective view showing another angle of the connecting terminal in Embodiment 1;

[0027] Figure 3 This is a perspective view showing the connection terminal in Embodiment 1 from another angle;

[0028] Figure 4 express Figure 2 Top view of the connecting terminal;

[0029] Figure 5 express Figure 2 Bottom view of the connecting terminal;

[0030] Figure 6 express Figure 2 Side view of the connecting terminal;

[0031] Figure 7 express Figure 2 Front view of the connecting terminal;

[0032] Figure 8 This is a perspective view showing the connection terminal block at one angle in Embodiment 2;

[0033] Figure 9 express Figure 8 The exploded view of the terminal block shown;

[0034] Figure 10 express Figure 8 The diagram shows a cross-sectional view of the terminal block along line aa.

[0035] Figure 11 express Figure 8 The shown is a cross-sectional view of the terminal block along line bb.

[0036] Figure 12 This is a perspective view showing another angle of the connecting terminal block in Embodiment 2;

[0037] Figure 13 express Figure 12 The exploded view of the terminal block shown;

[0038] Figure 14 express Figure 13 Enlarged view of region A in the middle;

[0039] Figure 15 express Figure 13 Enlarged view of region B in the middle;

[0040] Figure 16 This is a three-dimensional structural diagram of the push-button switch in Embodiment 3;

[0041] Figure 17 express Figure 16 The exploded view of the push-button switch shown.

[0042] Figure 18This is a three-dimensional structural diagram showing another angle of the push-button switch in Embodiment 3;

[0043] Figure 19 express Figure 18 The diagram shown is an exploded view of the push-button switch.

Detailed Implementation Methods

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0045] Example 1: Please refer to the following: Figures 1-7 This embodiment provides a connecting terminal 100 for connecting a first structural member 200 and a second structural member 300. The connecting terminal 100 includes a main body 1, a welding part 2 connected to the main body 1 and welded to the first structural member 200, and a snap-fit ​​part 3 connected to the main body 1 and detachably connected to the second structural member 300. The welding part 2 and the snap-fit ​​part 3 are located at opposite ends of the main body 1 along a first direction X.

[0046] The main body 1 serves as the structural basis of the connecting terminal 100, and includes a base plate 11 extending along a first direction X and two side plates 12 formed by bending and extending from opposite sides of the base plate 11 along a third direction Z in a second direction Y. The two side plates 12 are kept parallel and spaced apart. In other words, both side plates 12 are bent and extended away from the base plate 11 and closer to the second structural member 300.

[0047] The welding part 2 includes two solder pads 20. One end of each solder pad 20 is fixed to the side plate 12 in the third direction Z, and the other end is suspended. The suspended ends of the two solder pads 20 form a gap 21 in the second direction Y.

[0048] Each of the pads 20 has a recessed end face facing away from the gap 21 to form a pad groove 22. The pad groove 22 is flush with the two surfaces of the pad 20 along the third direction Z. The pad groove 22 serves as a space for receiving solder. During soldering, the first structural member 200 contacts the surfaces of the two pads 20 away from the main body 1, sealing one end opening of the pad groove 22. Solder is injected from the other end opening of the pad groove 22 and diffuses into the gap 21. After the solder cools and hardens, the first structural member 200 and the pads 20 are fixed.

[0049] The gap 21 is designed to accommodate more solder during the welding process, thereby increasing the contact area between the solder and the first structural component 200 and the pad 20, and increasing the reliability of the weld. Furthermore, the two pads 20 are symmetrically arranged about the gap 21, so that the solder used for fixing is located in the exact middle of the two pads 20, which provides a balanced and enhanced fixing effect for the two pads 20.

[0050] The latching portion 3 includes two spaced-apart elastic components 30. Each elastic component 30 includes a first elastic unit 31 connected to the main body 10 in a first direction X and a second elastic unit 32 connected to the first elastic unit 31 in a third direction Z. Preferably, any two of the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The third direction Z is the disassembly direction when the second structural member 300 is detachably connected to the latching portion 3. The second elastic unit 32 is connected to the first elastic unit 31 and is located above the first elastic unit 31, and the second elastic unit 32 protrudes entirely from the first elastic unit 31.

[0051] Two elastic components 30 have two first elastic units 31 spaced apart to form a first insertion seam 33, and two second elastic units 32 spaced apart to form a second insertion seam 34. The first insertion seam 33 and the second insertion seam 34 communicate in the third direction Z to form an insertion portion 35. The second structural member 300 is inserted into the insertion portion 35 and contacts the first elastic unit 31 and / or the second elastic unit 32. The second insertion seam 34 is located above the first insertion seam 33. Both the first insertion seam 33 and the second insertion seam 34 are located between the extension surfaces of the two side plates 12. The extension surface of the gap 21 is aligned with the first insertion seam 33.

[0052] Preferably, the bottom end of the second structural member 300 completely passes through the plug-in portion 35 and contacts the base plate 11, and the side wall of the second structural member 300 simultaneously contacts the first elastic unit 31 and the second elastic unit 32, so as to increase the contact area between the second structural member 300 and the connecting terminal 100 and ensure the stability of the connection.

[0053] Both the first elastic unit 31 and the second elastic unit 32 can undergo elastic deformation in the second direction Y. When the second structural member 300 is inserted into the plug-in portion 35, the first elastic unit 31 and the second elastic unit 32 deform in opposite directions in the second direction Y to expand the plug-in portion 35 and adapt to the size of the second structural member 300. When the second structural member 300 is pulled out of the plug-in portion 35, the first elastic unit 31 and the second elastic unit 32 reset to their initial state in opposite directions in the second direction Y.

[0054] Structurally, the second elastic unit 32 can be regarded as an "extended" version of the first elastic element 31, giving the elastic component 30 greater freedom and thus better elasticity. Furthermore, the first elastic unit 31 and the second elastic unit 32 extend in different directions, utilizing space in the first direction X and the third direction Z, making the connecting terminal 100 structurally compact and meeting the miniaturization requirements. Functionally, the first elastic unit 31 and the second elastic unit 32 are arranged in parallel to form a superimposed design for plug-in functionality. When one loses its elastic function, the other can still perform its elastic function.

[0055] Preferably, the connecting terminal 100 is integrally formed from metal material and is used for electrical connection between the first structural component 200 and the second structural component 300.

[0056] The first elastic unit 31 includes a first elastic arm 311, a second elastic arm 312 spaced apart from and facing the first elastic arm 311, and a first connecting arm 313 connecting the first elastic arm 311 and the second elastic arm 312. The first elastic arm 311 is fixed to the main body 1 in a first direction X. The connection position of the first connecting arm 313 with the first elastic arm 311 and the second elastic arm 312 is smoothly transitioned to avoid stress concentration. The first connecting arm 313 has a double-bend structure, which bends and extends from the first elastic arm 311 and connects to the second elastic arm 312. Preferably, the first elastic arm 311 and the second elastic arm 312 are arranged parallel and spaced apart.

[0057] Specifically, the first elastic arm 311 is fixed to the side plate 12 in the first direction X, and the first elastic arm 311 and the side plate 12 are arranged in a one-to-one correspondence. The first elastic unit 31 is U-shaped in general, which can provide stable support and rebound force when subjected to force, and ensure good contact with the second structural member 300.

[0058] The second elastic unit 32 includes a third elastic arm 321 extending upward from and away from the second elastic arm 312, a fourth elastic arm 322 spaced from and facing the third elastic arm 321, and a second connecting arm 323 connecting the third elastic arm 321 and the fourth elastic arm 322. The third elastic arm 321 is fixed to the second elastic arm 312 in a third direction Z, and the fourth elastic arm 322 is suspended and spaced apart from the second elastic arm 312. The second connecting arm 323 is also a double-bent structure, extending from the third elastic arm 321 and connecting to the fourth elastic arm 322, so that the fourth elastic arm 322 extends downward from the second connecting arm 323 and closer to the first elastic unit 31. The third elastic arm 321 and the second elastic arm 312 are arranged in a one-to-one correspondence. Preferably, the third elastic arm 321 and the fourth elastic arm 322 are arranged parallel and spaced apart.

[0059] The second elastic arms 312 of the two first elastic units 31 are spaced apart to form the first insertion seam 33, and the third elastic arms 321 of the two second elastic units 32 are spaced apart to form the second insertion seam 34. The second elastic unit 32 is generally U-shaped, which can provide stable support and rebound force when subjected to force, ensuring good contact with the second structural member 300. Each of the third elastic arms 321 extends from the second elastic arms 312 toward each other, and the cross-section of the second insertion seam 34 gradually decreases from the second elastic arms 312 upwards and away from the first insertion seam 33.

[0060] The second spring arm 312 and the third spring arm 321 are both parts that directly contact the second component 200; the first spring arm 311 and the fourth spring arm 322 are both parts that do not directly contact the second component 200; the two second spring arms 312 are located between the two first spring arms 311, which can make full use of the space between the two first spring arms 311; the two fourth spring arms are located outside the two third spring arms 321, and the fourth spring arms 322 are located above the first spring arms 311, which can make full use of the space above the first spring arms 311.

[0061] Example 2: Please refer to Figure 8-15 This embodiment provides a terminal block 400, including the terminal block 100 from Embodiment 1 and a base 500 for encapsulating the terminal block 100. The base 500 provides fixation and protection for the terminal block 100, extending its service life. In this embodiment, two terminals block 100 are mounted on the base 500 to form an electrical circuit.

[0062] The bottom of the base 500 is provided with a first mounting hole 510 and a first slot 520 arranged side by side along the first direction X. The bottom of the base 500 extends along the third direction Z and toward the second structural member 300 to form a boss 540. The boss 540 is provided with a second mounting hole 541. The first slot 520 is located outside the first mounting hole 510. The second mounting hole 541 extends along the third direction Z and communicates with the first mounting hole 510.

[0063] The snap-fit ​​part 3 is suspended in the first mounting hole 510, the main body part 1 is snapped in the first slot 520, and the welding part 2 is exposed outside the base 500.

[0064] The second structural member 200 passes through the first mounting hole 510 and the second mounting hole 541 and connects to the snap-fit ​​part 3. The first mounting hole 510 and the second mounting hole 541 can hide the connection part between the second structural member 200 and the snap-fit ​​part 3 inside the base 500, which protects the connection part and prevents the stability of the connection from being affected by external impact.

[0065] The snap-fit ​​portion 3 is spaced apart from the wall of the first mounting hole 510, providing sufficient travel space for the deformation of the elastic component 30.

[0066] The main body 1 is snapped into the first slot 520 to fix the connecting terminal 100 to the base 500. Specifically, a support block 530 is provided at the bottom of the first slot 520, which divides the first slot 520 into two sub-slots 521 spaced apart along the second direction Y. The base plate 11 supports the support block 530, and the two side plates 12 are respectively snapped into the two sub-slots 521.

[0067] Furthermore, in order to increase the connection stability between the main body 1 and the base 500, the base plate 11 is also provided with a through hole 110, and the support block 530 is also provided with a first locking block 531. The first locking block 531 is inserted into the locking hole 110 to achieve fixation, and the first locking block 531 and the locking hole 110 are interference fit.

[0068] Furthermore, a second locking block 121 is also provided on the side plate 12, and a second locking groove 5210 is recessed in the groove wall of the sub-slot 521. The second locking block 121 is a wedge-shaped block, and the second locking block 121 is correspondingly engaged in the second locking groove 5210. Since the second locking block 121 is wedge-shaped, there is a one-way locking between it and the second locking groove 5210. Therefore, in order to ensure that the second locking block 121 can be smoothly inserted into the second locking groove 5210, a clearance hole 122 is also provided on the side plate 21. Any side wall of the second locking block 121 is fixed to the hole wall of the clearance hole 122, and the second locking block 121 can swing in the second direction Y within the clearance hole 122. When the side plate 12 is inserted into the sub-slot 521, the groove wall of the sub-slot 521 presses against the second locking block 121, causing the second locking block 121 to move into the clearance hole 122. After the side plate 21 is inserted into place, it loses the pressing effect of the groove wall of the sub-slot 521, and the second locking block 121 rebounds and locks into the second slot 5210, restricting the movement of the side plate 12 in the third direction Z.

[0069] The welding part 2 is exposed outside the base 500 to facilitate welding and fixing with the first structural member 200.

[0070] Example 3: Please refer to Figures 16-19 This embodiment provides a push button switch 600, including a PCB board 610, a connection terminal block 400 as in embodiment 2, and a pressing module 620. The connection terminal block 400 is welded and fixed to the PCB board 610 through the welding part 2, and the guide pin 621 of the pressing module 620 is pluggably connected to the snap-fit ​​part 3.

[0071] The pressing module 620 receives the user's press and generates an electrical signal, which is transmitted to the connection terminal 100 via the guide pin 621 and finally to the PCB board 610. The pressing module 620 is disposed above the PCB board 610, and the connection terminal 400 is disposed below the PCB board 610. The PCB board 610 has a through hole 611 corresponding to the position of the boss 540, the boss 540 is installed in the through hole 611, and the guide pin 621 is inserted into the insertion part 35.

[0072] Specifically, the boss 540 can be partially inserted into the through hole 611, completely inserted into the through hole 611, or exposed above the PCB board 610 through the through hole 611. The boss 540 can serve as a positioning element during the installation of the connecting terminal block 400 and the PCB board 610, assisting in the installation of the boss 540. It can also serve as a limiting element after the connecting terminal block 400 is installed, restricting its movement.

[0073] In addition to being fixed by the welding part 2, the base 500 and the PCB board 610 also need to be fixed by an additional structure, such as by ultrasonic welding, glue application, clip fixing or screw fixing.

[0074] During use, the connecting terminal block 400 is completely anchored to the PCB board 610, forming a circuit module together. The pressing module 620 is pluggable to the circuit module. Therefore, the circuit module and the pressing module 620 are manufactured separately, and then the pressing module 620 is plugged into the circuit module to complete the assembly. During use, the pressing module 620 can also be hot-swapped directly onto the circuit module, allowing for direct replacement of the pressing module 620.

[0075] In this embodiment, the key switch 600 serves as a key on the keyboard. Pressing the key switch 600 generates a corresponding sensing signal for the key switch 600.

[0076] The above description is merely an embodiment of this utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this utility model, but these improvements all fall within the protection scope of this utility model.

Claims

1. A connecting terminal, characterized in that, For connecting the first structural component and the second structural component, the connecting terminal includes: Main body; A welding section, which is connected to the main body and welded to the first structural member; The snap-fit ​​portion is connected to the main body portion and detachably connected to the second structural member. The snap-fit ​​portion includes two spaced elastic components. Each elastic component includes a first elastic unit connected to the main body portion and a second elastic unit connected to the first elastic unit and extending in a direction away from the first elastic unit. The first elastic units of the two elastic components are spaced apart to form a first insertion seam, and the second elastic units of the two elastic components are spaced apart to form a second insertion seam. The first insertion seam and the second insertion seam are interconnected to form an insertion part. The second structural member is inserted into the insertion part and contacts the first elastic unit and / or the second elastic unit. The second insertion seam is located above the first insertion seam.

2. The connection terminal according to claim 1, characterized in that, The second elastic element protrudes entirely from the first elastic element.

3. The connection terminal according to claim 1, characterized in that, Each of the first elastic units includes a first elastic arm, a second elastic arm spaced apart from and facing the first elastic arm, and a first connecting arm that bends and extends from the first elastic arm and is connected to the second elastic arm. The first elastic arm is connected to the main body, and the second elastic arms of the two first elastic units are spaced apart to form the first insertion seam.

4. The connecting terminal according to claim 3, characterized in that, Each of the second elastic units includes a third elastic arm extending from the second elastic arm in a direction away from the first elastic unit, a second connecting arm extending from the third elastic arm in a direction bent toward the first elastic unit, and a fourth elastic arm extending from the second connecting arm toward the first elastic unit, the fourth elastic arm being suspended and spaced apart from the third elastic arm; the third elastic arms of the two second elastic units are spaced apart to form the second insertion seam.

5. The connecting terminal according to claim 4, characterized in that, The main body includes a base plate and two side plates that bend and extend away from the base plate from opposite sides. Each first elastic arm is connected to the side plate, and each side plate corresponds to a first elastic unit. The first insertion seam and the second insertion seam are both located between the extended surfaces of the two side plates.

6. The connecting terminal according to claim 4, characterized in that, The two third spring arms extend from the second spring arm toward each other, and the cross-section of the second joint gradually decreases from the second spring arm toward the direction away from the first joint.

7. The connecting terminal according to claim 5, characterized in that, The welding part includes two pads, one end of each pad is connected to the side plate and the other end is suspended. The suspended ends of the two pads are spaced apart to form a gap. The end face of the suspended end of each pad is recessed in a direction away from the gap to form a pad groove. The extension surface of the gap is aligned with the first insertion seam.

8. A connecting terminal block, characterized in that, The device includes a connection terminal as described in any one of claims 1-7 and a connection terminal holder for encapsulating the connection terminal. The connection terminal holder is provided with a first mounting hole, a first slot communicating with the first mounting hole, and a boss extending toward the second structural member. A second mounting hole is provided in the boss. The first slot is located outside the first mounting hole. The second mounting hole communicates with the first mounting hole. The snap-fit ​​portion is suspended in the first mounting hole and spaced apart from the hole wall of the first mounting hole. The main body portion is snapped into the first slot. The welded portion is exposed outside the connection terminal holder.

9. The connecting terminal block according to claim 8, characterized in that, The connecting terminal block is also provided with a support block, which divides the first slot into two sub-slots with a gap, and the two side plates are respectively snapped into the two sub-slots; the main body is also provided with a through hole, and the support block is provided with a first snap block, which is snapped into the snap hole to achieve fixation.

10. A push-button switch, characterized in that, The push button switch includes a PCB board, a connection terminal block as described in claim 8 or 9, and a pressing module. The pressing module is disposed above the PCB board, and the connection terminal block is disposed below the PCB board. The PCB board has a through hole corresponding to the position of the boss. The boss is installed in the through hole. The connection terminal block is welded to the PCB board through the welding part. The pressing module has guide pins that can be plugged in and out through the through hole and the boss to the snap-fit ​​part.

Images