Electronic wall switch

Abstract

The utility model provides an electronic wall switch which comprises a cover plate, a panel, a circuit board and a switch base which are sequentially stacked, the circuit board comprises at least one light-emitting part, and at least one light guide part is arranged between the circuit board and the cover plate. The light guide part comprises a low-beam end close to the light emitting part and a high-beam end away from the light emitting part, the light guide part comprises a first cylinder, a second cylinder and a third cylinder which are sequentially connected from the high-beam end to the low-beam end, the diameters of the first cylinder, the second cylinder and the third cylinder are sequentially increased, and a first annular step is formed between the first cylinder and the second cylinder; a second annular step is formed between the second cylinder and the third cylinder, and the diameter of the second annular step is larger than that of the first annular step. The light guide part is formed by sequentially connecting a plurality of cylinders with different diameters, and the diameters of the cylinders are continuously reduced from the low beam end to the high beam end, so that the light guide part is conveniently installed and fixed, and the light gathering effect can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to an electronic wall switch. Background Technology

[0002] Wall switches, as one of the most frequently used facilities in homes, have become increasingly safe and sophisticated with the development of the modern era. With the improvement of people's lives and the continuous rise in living standards, electronic wall switches have gradually come into view. They are widely accepted by families due to their advantages such as safety, convenience, unique features, and mutual control. Electronic wall switches contain internal light-emitting elements that indicate whether the switch is on or off.

[0003] However, the light guiding effect of existing electronic wall switches is not good, and they cannot effectively transmit the status of the smart switch in the form of light. Moreover, existing electronic wall switches have a pressure plate above the circuit board and a mounting bracket below the circuit board, which makes the structure more complex and increases the thickness of the electronic wall switch. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an electronic wall switch with better light guiding effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This application provides an electronic wall switch, comprising a cover plate, a panel, a circuit board, and a switch base stacked sequentially. The switch base includes an integrally injection-molded mounting plate and a base box. The circuit board includes at least one light-emitting element. At least one light guide is disposed between the circuit board and the cover plate. The light guide includes a near-light end near the light-emitting element and a far-light end away from the light-emitting element. From the far-light end to the near-light end, the light guide includes a first cylinder, a second cylinder, and a third cylinder connected sequentially with increasing diameters. A first annular step is formed between the first cylinder and the second cylinder, and a second annular step is formed between the second cylinder and the third cylinder. The diameter of the second annular step is larger than the diameter of the first annular step.

[0007] In one possible implementation, the cover plate includes at least one first mounting hole, which includes a display window, a second limiting hole, and a third limiting hole with successively increasing diameters. The first cylinder is located within the display window, the second cylinder is located within the second limiting hole, and the third cylinder is at least partially located within the third limiting hole. A first limiting platform is formed between the display window and the second limiting hole, abutting against the first annular step. A second limiting platform is formed between the second limiting hole and the third limiting hole, abutting against the second annular step.

[0008] In one possible implementation, the light guide is fixedly mounted on the cover plate, and multiple strip-shaped ribs are respectively provided at intervals on the sidewalls of the display window and / or the second limiting hole and / or the third limiting hole.

[0009] In one possible implementation, the cover plate includes at least one display window, and the cover plate also includes at least one first protrusion located on the back of the cover plate and extending toward the panel, the first protrusion corresponding one-to-one with the display window, the first protrusion being a hollow structure and communicating with the display window to form a first mounting hole.

[0010] In one possible implementation, the circuit board is provided with at least one micro switch, the cover plate includes at least one pressing part, the panel is provided with at least one first through hole, the pressing part passes through the first through hole and acts on the micro switch, the first boss is connected to the pressing part and corresponds to the first through hole, and the light-emitting element extends at least partially into the first through hole.

[0011] In one possible implementation, the light guide is made of a transparent, elastic material.

[0012] In one possible implementation, the light guide is made of transparent silicone.

[0013] In one possible implementation, the mounting plate includes a first mounting groove with a first through hole communicating with a base box. The circuit board passes through the first through hole and is mounted inside the base box. The panel is mounted in the first mounting groove and snaps into the switch base. The switch base includes two first mounting protrusions located on both sides of the first through hole. The first mounting protrusions include second mounting holes.

[0014] In one possible implementation, the panel includes two bent and vertically connected second extensions on both sides, and the mounting plate includes four second through holes corresponding to the four second extensions. The four second extensions pass through the four second through holes and are snap-fitted to the base box.

[0015] In one possible implementation, two third extensions extend from both sides of the panel, and the first mounting groove of the mounting plate further includes a second mounting groove, with the two third extensions located within the second mounting groove; the cover plate is rotatably mounted on the panel, the ends of the third extensions include retaining pins, and the back of the cover plate includes retaining rings, which are rotatably mounted on the retaining pins.

[0016] Compared to existing technologies, the electronic wall switch described in this application includes a cover plate, a panel, a circuit board, and a switch base stacked sequentially. The circuit board includes at least one light-emitting element, and at least one light guide is disposed between the circuit board and the cover plate. The light guide includes a near-light end near the light-emitting element and a far-light end away from the light-emitting element. From the far-light end to the near-light end, the light guide includes a first cylinder, a second cylinder, and a third cylinder connected sequentially with progressively increasing diameters. A first annular step is formed between the first cylinder and the second cylinder, and a second annular step is formed between the second cylinder and the third cylinder. The diameter of the second annular step is larger than the diameter of the first annular step. The switch base is integrally injection molded, resulting in low cost and a thin overall design without the need for a pressure plate. The light guide is composed of multiple cylinders with different diameters connected sequentially, and the diameter of the cylinders continuously decreases from the near-light end to the far-light end, which facilitates the installation and fixation of the light guide and achieves a focusing effect.

[0017] Furthermore, the light guide is fixedly installed on the cover plate, and multiple strip-shaped ribs are respectively provided at intervals on the side walls of the display window and / or the second limiting hole and / or the third limiting hole. After the light guide is installed in the first mounting hole, the strip-shaped ribs can squeeze and fix the light guide to prevent it from falling off.

[0018] Furthermore, the light guide is made of transparent silicone, which is elastic, producing excellent light transmission while being easy to install and remove. Attached Figure Description

[0019] Figure 1 This is an exploded view of the electronic wall switch socket of this utility model;

[0020] Figure 2 This is a structural schematic diagram of the back of the cover plate of this utility model;

[0021] Figure 3 yes Figure 2 The image shows a detailed view of the window's position.

[0022] Figure 4 This is a sectional view of the cover plate of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of one embodiment of the light guide component of this utility model;

[0024] Figure 6 This is a cross-sectional view of the electronic wall switch of this utility model;

[0025] Figure 7 This is a schematic diagram of the structure of the switch base 4 of this utility model;

[0026] The reference numerals in the attached drawings include: cover plate 1; panel 2; circuit board 3; switch base 4; micro switch 31; light-emitting element 32; first through hole 21; pressing part 11; mounting plate 41; base box 42; first mounting groove 45; first through hole 44; first mounting protrusion 43; second mounting hole 431; light guide 5; near beam end 56; far beam end 57; display window 12; first boss 13; first mounting hole 14; strip rib 15; first cylinder 51; second cylinder 52; third cylinder 53; first annular step 54; second annular step 55; first limiting platform 16; second limiting platform 17; second extension 24; second through hole 23; third extension 25; second mounting groove 46; retaining shaft 26; retaining ring 18; elastic reset element 22; and terminal block 61. Detailed Implementation

[0027] The specific embodiments of this utility model are further described below with reference to the accompanying drawings. The scope of protection of this utility model is not limited to the description of the following embodiments.

[0028] This application provides an electronic wall switch, which refers to a unit that uses a combination of control boards and electronic components and programming to achieve intelligent circuit switching control. Furthermore, the electronic wall switch is a new type of home appliance that is safer and more practical, based on the electronic processing of ordinary wall switches. A cable tray is embedded inside the wall, and the electronic wall switch is fixedly installed in the cable tray.

[0029] like Figures 1-5 As shown, the electronic wall switch provided in this application includes a cover plate 1, a panel 2, a circuit board 3, and a switch base 4 stacked sequentially. The circuit board 3 is provided with at least one micro switch 31 and at least one light-emitting element 32. The cover plate 1 includes at least one pressing part 11. The panel 2 is provided with at least one first through hole 21. The pressing part 11 passes through the first through hole 21 and acts on the micro switch 31. The switch base 4 includes an integrally injection-molded mounting plate 41 and a base box 42. The panel 2 is installed in the mounting plate 41. The mounting plate 41 includes a first mounting groove 45. The first mounting groove 45 is provided with a first through hole 44 communicating with the base box 42. The circuit board 3 passes through the first through hole 44 and is installed in the base box 42. The panel 2 is installed in the first mounting groove 45 and is snapped into the switch base 4. The switch base 4 includes two first mounting protrusions 43 located on both sides of the first through hole 44. The first mounting protrusions 43 include second mounting holes 431. The panel 2 is installed in the first mounting groove 45, which can reduce the thickness of the electronic wall switch. The first mounting protrusion 43 can enhance the structural strength of the switch base 4. When the electronic wall switch is fixed by the mounting screw passing through the second mounting hole 431, it can prevent the electronic wall switch from deforming and affecting the aesthetics of the electronic wall switch.

[0030] At least one light guide 5 is provided between the cover plate 1 and the circuit board 3 of the electronic wall switch. The light guide 5 includes a near light end 56 close to the light-emitting element 32 and a far light end 57 away from the light-emitting element 32. The surface area of ​​the near light end 56 is larger than the surface area of ​​the far light end 57, which can make the light guide 5 produce a light-focusing effect.

[0031] Preferred, such as Figure 2 As shown, the cover plate 1 includes at least one first mounting hole 14, and at least the far-light end 57 of the light guide 5 is installed in the first mounting hole 14.

[0032] Preferred, such as Figure 3 As shown, the sidewall of the first mounting hole 14 includes a plurality of strip-shaped ribs 15 spaced apart. After the light guide 5 is installed in the first mounting hole 14, the strip-shaped ribs 15 can squeeze and fix the light guide 5 to prevent it from falling off.

[0033] Preferred, such as Figure 3 and Figure 5 As shown, the light guide 5 includes a first cylinder 51, a second cylinder 52, and a third cylinder 53 connected in sequence with increasing diameters from the far end 57 to the near end 56. Two annular steps with different diameters are formed between the first cylinder 51 and the third cylinder 53. The first mounting hole 14 of the cover plate 1 includes two limiting platforms that cooperate with the two annular steps to limit the movement, which facilitates the installation and fixation of the light guide 5 and achieves a light-focusing effect.

[0034] Furthermore, the two annular steps include: a first annular step 54 formed between the first cylinder 51 and the second cylinder 52, and a second annular step 55 formed between the second cylinder 52 and the third cylinder 53, wherein the diameter of the second annular step 55 is larger than the diameter of the first annular step 54. The two limiting platforms include a first limiting platform 16 abutting against the first annular step 54 and a second limiting platform 17 abutting against the second annular step 55.

[0035] Compared to existing technologies, the electronic wall switch described in this application includes a cover plate, a panel, a circuit board, and a switch base stacked sequentially. The switch base is integrally injection molded, resulting in low cost and a thin overall design without the need for a pressure plate. The circuit board includes at least one light-emitting element, and at least one light guide is disposed between the circuit board and the cover plate. The light guide is composed of multiple cylinders of different diameters connected sequentially, with the diameter of the cylinders decreasing from the near-light end to the far-light end. This facilitates the installation and fixation of the light guide while achieving a focusing effect.

[0036] Preferred, such as Figure 1 and Figure 2As shown, the light guide 5 is fixedly installed on the cover plate 1. The cover plate 1 includes at least one display window 12, and at least one of the light guides 5 is installed on at least one of the display windows 12. The display window 12 can be in the form of a through hole, or it can be covered with a light-transmitting material, such as glass, acrylic sheet, silicone, etc., which can play a role in dust prevention. In this embodiment, the display window 12 is in the form of a through hole.

[0037] Furthermore, such as Figure 2 , Figure 3 and Figure 6 As shown, at least one first protrusion 13 is provided on the back of the cover plate 1. The first protrusion 13 includes a second through hole. The first protrusion 13 is connected to the display window 12 to form a first mounting hole 14. At least the far-light end 57 of the light guide 5 is fixedly installed in the first mounting hole 14. Utilizing the rotational gap between the cover plate 1 and the panel 2 to provide the first protrusion 13 for mounting the light guide 5 reduces the thickness of the electronic wall switch and enhances its aesthetics. Furthermore, the light guide 5 can be first installed on the cover plate 1 to form a whole before the cover plate 1 is installed on the panel 2, resulting in high installation efficiency and facilitating automated installation by automated equipment, especially when the size of the first cylinder 51 is small. Further, the first protrusion 13 is connected to the pressing part 11, and the first protrusion 13 corresponds to the first through hole 21. The light-emitting element 32 at least partially extends into the first through hole 21. Figure 3 for Figure 2 Detailed images of some locations, Figure 4 This is a cross-sectional view of the light guide 5 of this application installed in the inner cover plate 1 of the first mounting hole 14. Figure 6 This is a cross-sectional view of the electronic wall switch of this application.

[0038] Furthermore, such as Figure 4 As shown, the first mounting hole 14 includes a display window 12, a second limiting hole, and a third limiting hole with successively increasing diameters. The first cylinder 51 is located within the display window 12, the second cylinder 52 is located within the second limiting hole, and the third cylinder 53 is at least partially located within the third limiting hole. The connection between the display window 12 and the second limiting hole forms the first limiting platform 16, and the connection between the second limiting hole and the third limiting hole forms the second limiting platform 17.

[0039] Furthermore, such as Figure 3As shown, multiple strip-shaped ribs 15 are respectively provided at intervals on the sidewalls of the display window 12 and / or the second limiting hole and / or the third limiting hole. After the light guide 5 is installed in the first mounting hole 14, the strip-shaped ribs 15 can press and fix the first cylinder 51 and / or the second cylinder 52 and / or the third cylinder 53 to prevent the light guide 5 from falling out of the first mounting hole 14. In this embodiment, the second limiting hole and the third limiting hole each include three strip-shaped ribs 15 for pressing and fixing the second cylinder 52 and the third cylinder 53.

[0040] Preferred, such as Figure 1 As shown, the circuit board 3 includes four micro switches 31 and four light-emitting elements 32 arranged at intervals. A light-emitting element 32 is arranged next to each micro switch 31. The light-emitting element 32 is positioned corresponding to the first through hole 21. The light guide 5 extends into the first through hole 21, so that the far end 57 of the light guide 5 is close to the light-emitting element 32, which facilitates the absorption of the light energy generated by the light-emitting element 32.

[0041] Furthermore, the light-emitting element 32 can be an LED (light-emitting diode).

[0042] Preferably, the light guide 5 is made of a transparent elastic material, which not only produces good light transmission but also facilitates installation and disassembly. Of course, the light guide 5 can also be made of only transparent material and may not be elastic.

[0043] Preferably, the light guide 5 is made of transparent silicone. Silicone is elastic, which not only produces a good light transmission effect, but also makes it easy to install and disassemble.

[0044] Furthermore, the light guide 5 is made of transparent plastic material, which can undergo plastic deformation, has a certain degree of elasticity, and is also transparent to light.

[0045] Furthermore, such as Figure 1 As shown, the electronic wall switch includes two cover plates 1 arranged side by side. Each cover plate 1 includes two pressing parts 11 arranged at intervals. The four pressing parts 11 of the two cover plates 1 correspond to the four micro switches 31 respectively. The panel 2 is provided with four first through holes 21 at intervals. The four pressing parts 11 pass through the four first through holes 21 respectively and act on the four micro switches 31.

[0046] Furthermore, such as Figure 2 and Figure 3 As shown, the pressing part 11 includes a second protrusion protruding towards the panel 2. The second protrusion is close to the first protrusion 13, and the second protrusion and the first protrusion 13 correspond to the first through hole 21.

[0047] Preferred, such as Figure 1As shown, the size of the mounting plate 41 of the switch base 4 is larger than the size of the base box 42. The mounting plate 41 protrudes from the base box 42 around its perimeter to form a first extension, reducing the volume of the base box 42 and facilitating its installation inside the cable tray. The first extension can also be used to shield the cable tray, providing a dustproof effect.

[0048] Preferred, such as Figure 1 and Figure 7 As shown, the panel 2 includes two bent and vertically connected second extensions 24 on each side. The mounting plate 41 includes four second through holes 23 corresponding to the four second extensions 24. The four second extensions 24 pass through the four second through holes 23 and are snapped into the base box 42. This installation method simplifies installation and disassembly. Furthermore, the snapping of the second extensions 24 through the second through holes 23 into the outer wall of the base box 42 does not occupy the space between the panel 2 and the base box 42, thus reducing the thickness of the electronic wall switch. Figure 7 This is a schematic diagram of the structure of the switch base 4 in the electronic wall switch of this application.

[0049] Preferred, such as Figure 1 and Figure 7 As shown, two third extensions 25 extend from both sides of the panel 2. The first mounting groove 45 of the mounting plate 41 also includes a second mounting groove 46. The two third extensions 25 are located in the second mounting groove 46, which can limit the panel 2.

[0050] Furthermore, such as Figures 1-2 and Figure 4 As shown, the cover plate 1 is rotatably mounted on the panel 2 via a snap-fit ​​structure. The panel 2 includes at least two snap pins 26, and at least two snap rings 18 are provided on the back of the cover plate 1, with the two snap rings 18 respectively snapping onto the two snap pins 26. Specifically, the end of the third extension 25 includes a snap pin 26, which does not protrude from the plane of the panel 2. The back of the cover plate 1 includes snap rings 18, which are rotatably mounted on the snap pins 26. The rotation axis of the cover plate 1 is located within the first mounting groove 45 of the mounting plate 41, making the connection between the cover plate 1 and the switch base 4 tighter and further reducing the thickness of the electronic wall switch.

[0051] Preferred, such as Figure 1 As shown, the electronic wall switch includes two cover plates 1 arranged side by side, each cover plate 1 including two retaining rings 18, and four retaining shafts 26 spaced apart on the panel 2, with the two cover plates 1 respectively mounted on the four retaining shafts 26.

[0052] Preferred, such as Figure 1As shown, at least one elastic reset member 22 is provided on the upper surface of the panel 2. The elastic reset member 22 abuts against the cover plate 1. When the cover plate 1 is pressed, the elastic reset member 22 can reset the cover plate 1.

[0053] Furthermore, the panel 2 includes at least one third through hole, and at least one of the elastic reset members 22 are installed in at least one of the third through holes. Specifically, one end of the elastic reset member is fixedly connected to the third through hole, and the other end is a suspended reset end. The reset end includes an elastic boss protruding towards the cover plate 1. After the electronic wall switch is installed, the elastic boss abuts against the back of the cover plate 1.

[0054] In a preferred embodiment, the panel 2 and the elastic reset member 22 are integrally injection molded. The plastic deformation generated by the elastic reset member 22 serves as the elastic driving force for resetting the cover plate 1. This method is convenient to produce and install, and has low cost.

[0055] Preferred, such as Figure 1 As shown, multiple terminals 61 are arranged side-by-side on the circuit board 3, with the terminals 61 positioned on the side of the circuit board 3 facing the base box 42. The base box 42 of the switch base 4 has terminal slots corresponding one-to-one with the multiple terminals 61. Insulating partitions are provided between the terminal slots. The circuit board 3 has a first fixing hole for fixing the insulating partition and a second fixing hole for installing the terminals 61. The insulating partitions between the terminal slots enhance the insulation protection performance between the terminals 61 and prevent phase-to-phase short circuits. The insulating partitions can be integrally formed with the switch base 4, reducing process steps and improving production efficiency. In this embodiment, the circuit board 3 has six terminals 61.

[0056] Furthermore, a through hole is provided on the back of the terminal block slot for connecting external cables.

[0057] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0058] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications or substitutions should be considered within the protection scope of the present invention.

Claims

1. An electronic wall switch, comprising a cover plate (1), a panel (2), a circuit board (3), and a switch base (4) stacked sequentially, wherein the switch base (4) comprises an integrally injection-molded mounting plate (41) and a base box (42), the circuit board (3) comprises at least one light-emitting element (32), and at least one light guide (5) is disposed between the circuit board (3) and the cover plate (1), the light guide (5) comprising a near-light end (56) close to the light-emitting element (32) and a far-light end (57) away from the light-emitting element (32), characterized in that, The light guide (5) includes a first cylinder (51), a second cylinder (52) and a third cylinder (53) connected in sequence from the far end (57) to the near end (56), with the diameters increasing sequentially. A first annular step (54) is formed between the first cylinder (51) and the second cylinder (52), and a second annular step (55) is formed between the second cylinder (52) and the third cylinder (53). The diameter of the second annular step (55) is larger than the diameter of the first annular step (54).

2. The electronic wall switch according to claim 1, characterized in that, The cover plate (1) includes at least one first mounting hole (14), the first mounting hole (14) includes a display window (12) with an increasing diameter, a second limiting hole and a third limiting hole, the first cylinder (51) is located inside the display window (12), the second cylinder (52) is located inside the second limiting hole, and the third cylinder (53) is at least partially located inside the third limiting hole; a first limiting platform (16) is formed between the display window (12) and the second limiting hole that abuts against the first annular step (54), and a second limiting platform (17) is formed between the second limiting hole and the third limiting hole that abuts against the second annular step (55).

3. The electronic wall switch according to claim 2, characterized in that, The light guide (5) is fixedly installed on the cover plate (1), and multiple strip ribs (15) are respectively provided at intervals on the side walls of the display window (12) and / or the second limiting hole and / or the third limiting hole.

4. The electronic wall switch according to claim 2, characterized in that, The cover plate (1) includes at least one display window (12). The cover plate (1) also includes at least one first protrusion (13) located on the back of the cover plate (1) and extending toward the panel (2). The first protrusion (13) corresponds one-to-one with the display window (12). The first protrusion (13) is a hollow structure and communicates with the display window (12) to form a first mounting hole (14).

5. The electronic wall switch according to claim 4, characterized in that, The circuit board (3) is provided with at least one micro switch (31), the cover plate (1) includes at least one pressing part (11), the panel (2) is provided with at least one first through hole (21), the pressing part (11) passes through the first through hole (21) and acts on the micro switch (31), the first boss (13) is connected to the pressing part (11), and the first boss (13) corresponds to the first through hole (21), and the light-emitting element (32) extends at least partially into the first through hole (21).

6. The electronic wall switch according to claim 1, characterized in that, The light guide (5) is made of a transparent elastic material.

7. The electronic wall switch according to claim 6, characterized in that, The light guide (5) is made of transparent silicone.

8. The electronic wall switch according to claim 1, characterized in that, The mounting plate (41) includes a first mounting groove (45), which has a first through hole (44) communicating with the base box (42). The circuit board (3) passes through the first through hole (44) and is installed in the base box (42). The panel (2) is installed in the first mounting groove (45) and snaps into the switch base (4). The switch base (4) includes two first mounting protrusions (43), which are located on both sides of the first through hole (44). The first mounting protrusions (43) include a second mounting hole (431).

9. The electronic wall switch according to claim 8, characterized in that, The panel (2) includes two bent and vertically connected second extensions (24) on both sides. The mounting plate (41) includes four second through holes (23) corresponding to the four second extensions (24). The four second extensions (24) pass through the four second through holes (23) and are snapped together with the base box (42).

10. The electronic wall switch according to claim 8, characterized in that, Two third extensions (25) extend from both sides of the panel (2), and the first mounting groove (45) of the mounting plate (41) also includes a second mounting groove (46). The two third extensions (25) are located in the second mounting groove (46). The cover plate (1) is rotatably mounted on the panel (2). The end of the third extension (25) includes a retaining pin (26), and the back of the cover plate (1) includes a retaining ring (18). The retaining ring (18) is rotatably mounted on the retaining pin (26).

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