Wire harness guiding structure

Abstract

The invention relates to a wire harness guiding structure, and the structure comprises an assembly part which is provided with a first through hole in the middle; the elastic part is detachably connected with the assembly part, the elastic part is provided with an installation part and a bending part in the extending direction, the installation part is arranged in the first through hole in a penetrating mode and limited by the first through hole, the elastic part is provided with one or more second through holes for the wire harness to penetrate through, and the second through holes extend in the extending direction of the elastic part and penetrate through the elastic part. The wire harness is arranged in the second through hole, and the circumferential direction of the wire harness is limited through the elastic piece, so that the wire harness is fixed, and the wire harness can pass through the hole in a narrow space.

Description

Technical Field

[0001] The present application relates to the field of wiring technology, and in particular to a wire harness guiding structure. Background Art

[0002] With the rapid development of the automobile industry, the number of parts on automobiles has increased dramatically, resulting in smaller and smaller space for wiring harnesses, thicker wiring harnesses, and increasing difficulty in wiring harnesses that pass through sheet metal.

[0003] Conventional technology generally uses a wiring harness elastic member and a wiring harness combination arrangement, the elastic member and the sheet metal are fitted together in a snap-fit ​​manner, and the elastic member is connected to the sheet metal by forced compression.

[0004] However, for multi-directional wiring harnesses that need to pass through sheet metal holes, the narrow layout space of existing projects cannot meet the bending radius requirements of the wiring harnesses, resulting in extrusion of the wiring harnesses and damage to the wiring harnesses. Summary of the invention

[0005] Based on this, it is necessary to provide a wire harness guiding structure to solve the problem that the wire harness is difficult to route in the assembly.

[0006] A wire harness guiding structure, comprising:

[0007] An assembly part, wherein a first through hole is formed in the middle of the assembly part; and

[0008] An elastic member is detachably connected to the assembly member, and the elastic member has a mounting portion and a bending portion along the extension direction, the mounting portion is passed through the first through hole and limited by the first through hole, and the elastic member is provided with one or more second through holes for the wiring harness to pass through, and the second through holes extend along the extension direction of the elastic member and penetrate the elastic member.

[0009] In one embodiment, the side of the assembly part protrudes outward and has a first side wing, the first side wing is provided with a third through hole, the side of the elastic part protrudes outward and has a second side wing, the second side wing is positioned opposite to the first side wing, the second side wing is provided with a fourth through hole, and the wiring harness guiding structure also includes a connecting part, and the connecting part passes through the third through hole and the fourth through hole at the same time to connect the assembly part and the elastic part.

[0010] In one embodiment, the assembly part has the first side wings on two opposite sides, and the two first side wings are each provided with the third through hole. The elastic member has the second side wings on two opposite sides, and the two second side wings are each provided with the fourth through hole. The assembly part and the elastic member are respectively connected by two connecting members.

[0011] In one embodiment, the connecting member has threads, and the assembly member and the elastic member are threadedly connected via the connecting member.

[0012] In one embodiment, the third through hole is a round hole or a waist-shaped hole; the fourth through hole is a round hole or a waist-shaped hole.

[0013] In one embodiment, the assembly part has a boss on one side facing the elastic part, and the elastic part has a groove on one side facing the assembly part. The positions of the groove and the boss correspond to each other, so that the boss can extend into the groove.

[0014] In one embodiment, an edge of the first through hole has a first protrusion along a direction away from the elastic member.

[0015] In one embodiment, the elastic member further includes one or more lead-out portions along the extending direction, the lead-out portions are connected to the bent portion, and one lead-out portion corresponds to one second through hole for the wire harness to pass through.

[0016] In one of the embodiments, the angle between the extension direction of the lead-out portion and the plane where the mounting portion is located is less than or equal to 20°.

[0017] In one embodiment, the edge of the assembly part has a second protrusion along the direction toward the elastic member, and the area of ​​the elastic member is smaller than the area of ​​the assembly part, so that when the elastic member and the assembly part are connected, the elastic member is surrounded by the second protrusion.

[0018] In the above-mentioned wire harness guiding structure, when the wire harness is passed through the second through hole, it is consistent with the extension path of the second through hole, and the elastic member has a curved portion, so that the wire harness can be passed through the curved portion to achieve the bending of the wire harness. Compared with the problem that the wire harness cannot be bent in a narrow space in the traditional technology, the wire harness guiding structure provided by the present application can achieve bending through the elastic member. On the one hand, the wire harness can be bent at the curved portion along the second through hole inside the elastic member. On the other hand, the elastic member is a soft elastic material, which can limit the bending angle of the wire harness to avoid the wire harness breaking due to excessive bending angle. By configuring the wire harness in the second through hole and limiting the circumference of the wire harness through the elastic member, the wire harness is fixed, so that the wire harness can be passed through the hole in a narrow space. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG. 1 is a diagram showing the combined structure of a wire harness guide structure in one embodiment.

[0020] FIG. 2 is an exploded view of a wire harness guiding structure in one embodiment.

[0021] FIG. 3 is a cross-sectional view of a wire harness guide structure in one embodiment.

[0022] Description of reference numerals:

[0023] 10. Assembly part; 11. First through hole; 12. First wing; 13. Boss; 14. Second protrusion; 20. Elastic member; 21. Mounting portion; 22. Bend portion; 23. Second wing; 24. Groove; 25. Lead-out portion; 26. Second through hole; 30. Wiring harness;. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0025] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0026] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0028] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0030] With the rapid development of the automobile industry, the number of parts on the car has increased dramatically, resulting in a smaller and smaller layout space for the wiring harness, thicker wiring harnesses, and increasing difficulty in arranging the wiring harness through the sheet metal. Nowadays, the vehicle models usually use a wiring harness rubber part and a wiring harness combination layout. The rubber part and the sheet metal are combined by a snap-on method, and the rubber part is connected to the sheet metal by forced compression.

[0031] The problem with traditional technology is that for multi-directional wire harnesses that need to pass through sheet metal holes, the narrow layout space of existing projects cannot meet the bending radius requirements of the wire harnesses, which can easily lead to excessive bending and twisting of the wire harnesses, causing damage to the wire harnesses.

[0032] Referring to FIG. 1 and FIG. 2 simultaneously, FIG. 1 shows a schematic diagram of the combined structure of the wire harness guide structure in an embodiment of the present application, and FIG. 2 shows an exploded view of the wire harness guide structure in an embodiment of the present application. The wire harness guide structure provided in an embodiment of the present application includes an assembly part 10 and an elastic part 20. Exemplarily, the assembly part 10 can be a hard material such as a sheet metal part, or can be a metal material. Exemplarily, the elastic part 20 can be a soft material, such as a rubber material. By designing the assembly method of the elastic part 20 and the assembly part 10 and the structure of the elastic part 20, a wire harness guide structure that meets the bending requirements of the wire harness 30 can be obtained.

[0033] Specifically, a first through hole 11 is provided in the middle of the assembly part 10. The elastic member 20 is detachably connected to the assembly part 10, and the elastic member 20 has a mounting portion 21 and a bending portion 22 along the extension direction. The mounting portion 21 is inserted into the first through hole 11 and is limited by the first through hole 11, and the bending portion 22 extends out of the first through hole 11 to form a bending direction of the wiring harness 30. The extension direction of the elastic member 20 may be a connection path between the axis of the mounting portion 21 and the axis of the bending portion 22.

[0034] For example, the mounting portion 21 and the bending portion 22 may be two connected parts or may be integrally formed. The mounting portion 21 is used to assemble with the assembly, and the bending portion 22 can construct a curved extension channel for the wire harness 30. When the wire harness 30 is passed through the elastic member 20, it can be extended along the extension direction of the elastic member 20. Due to the design of the bending portion 22, the wire harness 30 can be bent when passing through the bending portion 22.

[0035] Refer to Figure 3, which shows a cross-sectional view of a wire harness guiding structure in one embodiment. The elastic member 20 is provided with one or more second through holes 26 for the wire harness 30 to pass through. The second through holes 26 extend along the extension direction of the elastic member 20 and penetrate the elastic member 20. In this way, the wire harness 30 can extend into the second through hole 26 from one end of the elastic member 20, and then extend from the other end of the elastic member 20. The extension direction of the elastic member 20 refers to the direction of the connecting line of its central axis, which is the direction extending from the mounting portion 21 to the bending portion 22. The second through hole 26 provides a storage space for the wire harness 30, allowing the wire harness 30 to pass through the second through hole 26. The second through hole 26 is curved at the position of the bending portion 22, so that the wire harness 30 can pass through the second through hole 26.

[0036] Through the above-mentioned wire harness guiding structure, when the wire harness 30 is passed through the second through hole 26, it is consistent with the extension path of the second through hole 26, and the elastic member 20 has a curved portion 22, so that the wire harness 30 can be passed through the curved portion 22 to achieve the bending of the wire harness 30. Compared with the problem that the wire harness 30 cannot be bent in a narrow space in the traditional technology, the wire harness guiding structure provided by the present application can achieve bending through the elastic member 20. On the one hand, the wire harness 30 can be bent at the curved portion 22 along the second through hole 26 inside the elastic member 20. On the other hand, the elastic member 20 is a soft elastic material, which can limit the bending angle of the wire harness 30 to avoid the wire harness 30 from breaking due to excessive bending angle. By configuring the wire harness 30 in the second through hole 26, the circumferential direction of the wire harness 30 is limited by the elastic member 20 to achieve the fixation of the wire harness 30, so that the wire harness 30 can be passed through the hole in a narrow space.

[0037] Exemplarily, the number of the second through holes 26 may be one, two or more than three, one through hole corresponds to one wire harness 30, and the number of through holes may be determined by the number of wire harnesses 30. As shown in FIG. 1 and FIG. 2, in one embodiment of the present application, the number of the second through holes 26 is two, that is, the wire harness guiding structure shown in FIG. 1 or FIG. 2 can guide two wire harnesses 30 at the same time. It is understood that the present application does not limit the number of the second through holes 26, which may be one or more, all within the protection scope of the present application.

[0038] In some embodiments, the side of the assembly 10 protrudes outward and has a first side wing 12, the first side wing 12 is provided with a third through hole, the side of the elastic member 20 protrudes outward and has a second side wing 23, the second side wing 23 and the first side wing 12 are located opposite, and the second side wing 23 is provided with a fourth through hole, and the harness guide structure also includes a connector, and the connector passes through the third through hole and the fourth through hole at the same time to connect the assembly 10 and the elastic member 20. Exemplarily, the first side wing 12 and the second side wing 23 can be rectangular, triangular or other shapes, and their top angles can be set to rounded corners to reduce stress concentration. Optionally, as shown in Figures 1 and 2, the first side wing 12 and the second side wing 23 in this embodiment are triangular.

[0039] In a feasible implementation, the third through hole and the fourth through hole can be provided with threads, and the connecting piece is threadedly connected to the assembly part 10 and the elastic part 20, that is, the assembly part 10 and the elastic part 20 are screwed together through the connecting piece, thereby realizing a detachable connection between the assembly part 10 and the elastic part 20.

[0040] When the assembly part 10 and the elastic part 20 are combined, the two are first stacked together so that the third through hole and the fourth through hole are opposite to each other, and then the connecting member is inserted into the third through hole and the fourth through hole at the same time and tightened to achieve the combined connection. In this way, the connecting member can connect and fix the assembly part 10 and the elastic part 20. On the one hand, the assembly part 10 can improve the strength of the wire harness guide structure, and on the other hand, the elastic part 20 can provide a curved wire harness 30 channel.

[0041] Exemplarily, the second side wing 23 of the elastic member 20 may be a rigid structure with good mechanical strength. The connection strength of the elastic member 20 can be improved by the cooperation between the first side wing 12 and the second side wing 23 .

[0042] Furthermore, the assembly part 10 has first side wings 12 on opposite sides, and the two first side wings 12 are each provided with a third through hole. The elastic member 20 has second side wings 23 on opposite sides, and the two second side wings 23 are each provided with a fourth through hole. The assembly part 10 and the elastic member 20 are respectively connected by two connecting members.

[0043] The assembly part 10 has first side wings 12 on both sides, and the elastic part 20 has second side wings 23 on both sides. The first side wings 12 and the second side wings 23 on both sides are connected respectively, which can improve the connection stability and connection strength of the assembly part 10 and the installation part. In addition, the side wings on both sides can improve the balance and prevent one side from tilting during use.

[0044] Exemplarily, the two opposite first side wings 12 and the second side wings 23 are regarded as a side wing group, and both side wing groups can be screwed together through a connecting piece, thereby realizing a detachable connection between the assembly part 10 and the elastic part 20 .

[0045] Optionally, the third through hole and the fourth through hole may be round holes, so that the connector can be positioned after being inserted through the third through hole and the fourth through hole to prevent the assembly part 10 and the elastic part 20 from being misaligned. In order to adjust the position of the assembly part 10 and the elastic part 20, the third through hole and the fourth through hole may also be configured as waist-shaped holes, and the connector has a certain amount of space for movement in the waist-shaped holes, allowing position adjustment when not tightened.

[0046] In a feasible implementation, one of the two third through holes of the first side wings 12 on both sides of the assembly part 10 is a round hole, and the other is a waist-shaped hole. Correspondingly, one of the two fourth through holes of the second side wings 23 on both sides of the elastic member 20 is a round hole, and the other is a waist-shaped hole. Preferably, the round holes of the assembly part 10 and the elastic member 20 correspond to each other, and the waist-shaped holes correspond to each other. In this way, the position can be adjusted through the waist-shaped holes, thereby improving assembly flexibility.

[0047] In some embodiments, the assembly part 10 has a boss 13 on one side facing the elastic part 20 , and the elastic part 20 has a groove 24 on one side facing the assembly part 10 . The positions of the groove 24 and the boss 13 correspond, so that the boss 13 can extend into the groove 24 .

[0048] After the boss 13 extends into the groove 24, the combination strength between the assembly part 10 and the elastic part 20 can be improved, and the position of the elastic part 20 and the assembly part 10 can be limited to prevent the two from sliding relative to each other. During assembly, the boss 13 of the assembly part 10 and the groove 24 of the elastic part 20 can be matched first, and then the assembly part 10 and the elastic part 20 can be connected by a connecting piece.

[0049] Exemplarily, the protruding direction of the boss 13 is the direction of the assembly member 10 toward the center of the first through hole 11, and the concave direction of the groove 24 is the direction toward the inner central axis of the elastic member 20. As shown in FIG3 , the boss 13 of the assembly member 10 at least partially extends into the elastic member 20. In this way, when the assembly member 10 and the elastic member 20 are combined, the arrangement of the boss 13 and the groove 24 can limit the back movement of the two, thereby improving the connection stability.

[0050] Optionally, the assembly part 10 has a first protrusion at the edge of the first through hole 11 in the direction away from the elastic part 20. The assembly part 10 forms a first protrusion at the edge of the first through hole 11 in the direction of the elastic part 20, so that the assembly part 10 forms a curved structure at the edge of the through hole, and the contact with the elastic part 20 becomes an arc contact, thereby preventing the sharp edge from scratching the elastic part 20. At the same time, the first protrusion can form a boss 13 structure, which is convenient for matching with the groove 24 of the assembly part 10.

[0051] In a feasible implementation, the first protrusion can be used as a boss 13 structure, extending into the groove 24 formed by the elastic member 20. Since the elastic member 20 is a soft elastic material, it can be partially compressed and then restored to its original shape. When the assembly member 10 and the elastic member 20 are assembled, the assembly member 10 can appropriately squeeze the elastic member 20, so that the first protrusion extends into the groove 24 of the elastic member 20.

[0052] In some embodiments, the elastic member 20 further includes one or more lead-out portions 25 along the extension direction, and the extension direction of the wire harness 30 is limited by the lead-out portions 25. The lead-out portion 25 is connected to the curved portion 22, and one lead-out portion 25 corresponds to a second through hole 26 for the wire harness 30 to pass through. The lead-out portion 25 refers to a sleeve structure with a certain length. For example, the lead-out portion 25 can be a cylindrical sleeve with a hollow interior for the wire harness 30 to pass through. By setting the lead-out portion 25, the lead-out direction of the wire harness 30 can be limited, so that the lead-out direction of the wire harness 30 can be changed according to the use requirements. For example, when there is a demand for the lead-out direction of the wire harness 30, the lead-out direction of the lead-out portion 25 can be adjusted. In a feasible implementation, it is achieved by adjusting the angle between the lead-out portion 25 and the mounting portion 21.

[0053] In this embodiment, the curved portion 22 includes a first end and a second end, the first end of the curved portion 22 is connected to the mounting portion 21, and the lead-out portion 25 is disposed at the second end of the curved portion 22. The axis of the second end of the curved portion 22 is different from the axis of the first end, that is, the curved portion 22 is curved, and when the wire harness 30 extends from the curved portion 22, it extends a distance in the extension direction of the lead-out portion 25. On the one hand, the extension direction of the wire harness 30 can be limited by the lead-out portion 25; on the other hand, the lead-out portion 25 can also protect the wire harness 30, so that it is spaced apart from the assembly 10 to avoid being squeezed by the assembly 10.

[0054] As shown in FIG3 , in some embodiments, the angle α between the extension direction of the lead-out portion 25 and the plane where the mounting portion 21 is located is less than or equal to 20°. Exemplarily, the extension direction of the lead-out portion 25 refers to its axial direction, and the plane where the mounting portion 21 is located refers to its circumferential plane. Exemplarily, the angle α between the extension direction of the lead-out portion 25 and the plane where the mounting portion 21 is located can be, but is not limited to, 5°, 8°, 10°, 12°, 15°, 18°, or 20°.

[0055] Continuing to refer to FIG. 3 , in some embodiments, the edge of the assembly part 10 has a second protrusion 14 along the direction toward the elastic member 20, and the area of ​​the elastic member 20 is smaller than the area of ​​the assembly part 10, so that when the elastic member 20 and the assembly part 10 are connected, the elastic member 20 is surrounded by the second protrusion 14. Exemplarily, the area of ​​the elastic member 20 refers to the surface area of ​​the side where the mounting portion 21 contacts the assembly part 10, and the area of ​​the assembly part 10 refers to the surface area of ​​the side where the mounting portion 21 contacts the assembly part 10. In this way, the second protrusion 14 of the assembly part 10 can at least partially surround the elastic member 20, thereby protecting the edge of the elastic member 20.

[0056] When the assembly part 10 has the first side wing 12 and the elastic part 20 has the second side wing 23, the surface area of ​​the assembly part 10 is expanded to include the surface area of ​​the first side wing 12, and the area of ​​the elastic part 20 is expanded to include the area of ​​the second side wing 23. At this time, the edge of the assembly part 10 is the edge of the first side wing 12, and the edge of the elastic part 20 is the edge of the second side wing 23, that is, the first side wing 12 of the assembly at least partially surrounds the second side wing 23 of the elastic part 20.

[0057] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A wire harness guiding structure, characterized in that: The wire harness guiding structure comprises: An assembly part, wherein a first through hole is formed in the middle of the assembly part; and An elastic member is detachably connected to the assembly member, and the elastic member has a mounting portion and a bending portion along the extension direction, the mounting portion is passed through the first through hole and limited by the first through hole, and the elastic member is provided with one or more second through holes for the wiring harness to pass through, and the second through holes extend along the extension direction of the elastic member and penetrate the elastic member.

2. The wire harness guide structure according to claim 1, characterized in that: The side edge of the assembly part protrudes outward and has a first side wing, and the first side wing is provided with a third through hole. The side edge of the elastic part protrudes outward and has a second side wing, and the second side wing is opposite to the first side wing, and the second side wing is provided with a fourth through hole. The wiring harness guiding structure also includes a connecting part, and the connecting part passes through the third through hole and the fourth through hole at the same time to connect the assembly part and the elastic part.

3. The wire harness guide structure according to claim 2, characterized in that: The assembly part has the first side wings on opposite sides, and the two first side wings are each provided with the third through hole. The elastic member has the second side wings on opposite sides, and the two second side wings are each provided with the fourth through hole. The assembly part and the elastic member are respectively connected by two connecting members.

4. The wire harness guiding structure according to claim 2 or 3, characterized in that: The connecting member has threads, and the assembling member and the elastic member are threadedly connected via the connecting member.

5. The wire harness guiding structure according to claim 2 or 3, characterized in that: The third through hole is a round hole or a waist-shaped hole; the fourth through hole is a round hole or a waist-shaped hole.

6. The wire harness guide structure according to claim 1, characterized in that: The assembly part has a boss on one side facing the elastic part, and the elastic part has a groove on one side facing the assembly part. The positions of the groove and the boss correspond to each other, so that the boss can extend into the groove.

7. The wire harness guide structure according to claim 1, characterized in that: An edge of the first through hole has a first protrusion along a direction facing away from the elastic member.

8. The wire harness guiding structure according to claim 1, characterized in that: The elastic member further includes one or more lead-out portions along the extending direction, wherein the lead-out portions are connected to the bent portion, and one lead-out portion corresponds to one second through hole for the wire harness to pass through.

9. The wire harness guiding structure according to claim 8, characterized in that: An angle between an extending direction of the lead-out portion and a plane where the mounting portion is located is less than or equal to 20°.

10. The wire harness guiding structure according to claim 1, characterized in that: The edge of the assembly part has a second protrusion along the direction toward the elastic part, and the area of ​​the elastic part is smaller than the area of ​​the assembly part, so that when the elastic part and the assembly part are connected, the elastic part is surrounded by the second protrusion.

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