Knob fastening assembly

Abstract

The utility model provides a kind of knob fastening assembly, the knob fastening assembly provided includes fastening element, fastening element includes stem portion, flange head and cap body, cap body has the first through hole being set along axial direction, the bottom end of cap body is equipped with bending part, bending part extends along radial direction inward, the inner diameter of bending part is less than the aperture of first through hole;The outer edge of flange head is integrally connected with the one end of first through hole away from bending part;One end of stem portion is integrally connected to the inner edge of flange head, and the other end thereof passes out bending part along axial direction;Support seat, part support seat is located in first through hole and can move along axial direction relative thereto, one end of support seat is provided with protruding portion along radial direction and is clamped with bending part, second through hole and third through hole for stem portion to be sequentially penetrated are provided in support seat along axial direction;The inner diameter of second through hole is greater than the inner diameter of third through hole;Elastic element, elastic element is located in first through hole and second through hole.

Description

Technical Field

[0001] This utility model belongs to the field of fastener technology, and in particular relates to a knob fastening assembly. Background Technology

[0002] In industrial production, fastening components are mainly used to connect two or more objects together. Knob fastening components, as one type of fastening component, connect the fastening component to the sheet metal by rotating its included injection-molded cap. Patent application number CN202220071285.8 discloses a screw-riveting fastening component. By changing the contact surface between the bushing element and the support base to a planar contact, the bonding force when the two are engaged is greater, preventing tilting between the bushing element and the support base during downward pressing of the screw-riveting fastening component. This allows the injection-molded cap to maintain better verticality when rotated, avoiding contact with the inner wall of the sheet metal in a small space, and also improving the aesthetics of the connection to the sheet metal to some extent. However, this screw-riveting fastening component, in addition to the spring element, also needs to include four sub-components: a bushing element, a support base, a fastening element, and an injection-molded cap. Therefore, its assembly process is relatively cumbersome, costly, requires a large space, and has limited applicability. Utility Model Content

[0003] In view of the problems existing in the prior art, the main purpose of this utility model is to provide a knob fastening assembly. The provided knob fastening assembly includes fewer sub-components, has a simple structure, is easier to assemble, requires less space, and is applicable to more scenarios.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] This utility model provides a knob fastening assembly, including:

[0006] A fastening element includes a rod, a flange head, and a cap. The cap has a first through hole arranged axially, and a bent portion at the bottom end of the cap, which extends radially inward. The inner diameter of the bent portion is smaller than the diameter of the first through hole. The outer edge of the flange head is integrally connected to the end of the first through hole away from the bent portion. One end of the rod is integrally connected to the inner edge of the flange head, and the other end extends axially through the bent portion.

[0007] The support base is partially disposed within the first through hole and is axially movable relative to it. One end of the support base is radially provided with a protrusion that engages with the bent portion. The support base is axially provided with a second through hole and a third through hole through which the rod portion passes in sequence. The inner diameter of the second through hole is larger than the inner diameter of the third through hole.

[0008] An elastic element is disposed within the first through hole and the second through hole.

[0009] As a further description of the above technical solution, the included angle between the inner wall of the bent portion and the inner wall of the through hole is a right angle or an obtuse angle.

[0010] As a further description of the above technical solution, the end of the bent portion has a first gap to the outer wall of the support base, and the end of the protrusion has a second gap to the inner wall of the through hole.

[0011] As a further description of the above technical solution, the first gap and the second gap are consistent, the value range of the first gap is 0.15mm to 0.25mm, and the value range of the second gap is 0.15mm to 0.25mm.

[0012] As a further description of the above technical solution, a step is formed between the second through hole and the third through hole, one end of the elastic element facing the step abuts against the step, and the other end abuts against the end face of the flange head facing the rod.

[0013] As a further description of the above technical solution, the elastic element is sleeved on the rod.

[0014] As a further description of the above technical solution, the outer wall portion of the rod away from the flange head is provided with external threads.

[0015] As a further description of the above technical solution, the end of the support base away from the protrusion is provided with a connecting part for connecting with the first workpiece.

[0016] As a further description of the above technical solution, the connection method between the connecting part and the first workpiece includes press riveting connection, flip riveting connection, welding, fastening, bonding, self-piercing connection or threaded fastening.

[0017] As a further description of the above technical solution, the end face of the flange head facing away from the rod along the axial direction is flush with the end face of the cap body facing away from the rod; or,

[0018] The flange head protrudes axially from the end face opposite to the rod portion of the cap body.

[0019] Based on the above technical solutions, the outstanding effects of this utility model are as follows:

[0020] The knob fastening assembly provided by this utility model consists of only three sub-components: a fastening element, a support base, and an elastic element. Compared with existing knob fastening assemblies, it reduces two sub-components, making the assembly process simpler and more convenient, the overall structure after assembly is also simpler, and it requires less space and is applicable to more scenarios. The reason why the knob fastening assembly is reduced to three sub-components is that the cap, flange head, and rod are directly and integrally connected. That is, the cap still has a first through hole along the axial direction, and its bottom end still has a bent part that extends radially inward and has an inner diameter smaller than the diameter of the first through hole. The outer edge of the flange head is integrally connected to the end of the first through hole away from the bent part. One end of the rod is integrally connected to the inner edge of the flange head, and its other end extends axially out of the bent part. Part of the support seat is still located in the first through hole and can move relative to it axially. One end of the support seat has a protrusion that engages with the bent part radially. The support seat has a second through hole and a third through hole that the rod passes through sequentially along the axial direction. The inner diameter of the second through hole is larger than the inner diameter of the third through hole. The inner diameter of the second through hole is smaller than the inner diameter of the first through hole. The elastic element is still located in the first and second through holes and abuts against the bottom of the second through hole and can be compressed axially relative to the cap. When the top of the spin-riveting fastening assembly presses down on the fastening element, the fastening element can undergo axial displacement relative to the support seat, so that more of the support seat is located in the first through hole, thereby exposing the rod portion of the fastening element to the support seat and connecting it with the second workpiece to be connected. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the fastening element in the first embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the knob fastening assembly in the first embodiment of the present invention;

[0023] Figure 3 This is a cross-sectional view of the knob fastening assembly in the first embodiment of this utility model;

[0024] Figure 4 This is a cross-sectional view of the fastening element in the second embodiment of this utility model;

[0025] Figure 5 This is a schematic diagram of the knob fastening assembly in the second embodiment of the present invention;

[0026] Figure 6 This is a cross-sectional view of the knob fastening assembly in the second embodiment of this utility model.

[0027] Explanation of icon numbers:

[0028] 1. Fastening element; 11. Rod; 12. Flange head; 13. Cap; 131. First through hole; 132. Bending part; 2. Support seat; 21. Protrusion; 22. Second through hole; 23. Third through hole; 24. Connecting part; 3. Elastic element; 4. Stepped part. Detailed Implementation

[0029] 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be noted that the terms "upper," "middle," "lower," "inner," "outer," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The implementation methods of this utility model will now be described based on its overall structure.

[0031] Please see Figures 1 to 6 This utility model discloses a knob fastening assembly, comprising:

[0032] Fastening element 1 includes a rod 11, a flange head 12, and a cap 13. The cap 13 has a first through hole 131 arranged axially, and a bent portion 132 is provided at the bottom end of the cap 13. The bent portion 132 extends radially inward, and the inner diameter of the bent portion 132 is smaller than the diameter of the first through hole 131. The outer edge of the flange head 12 is integrally connected to the end of the first through hole 131 away from the bent portion 132. One end of the rod 11 is integrally connected to the inner edge of the flange head 12, and the other end extends axially through the bent portion 132.

[0033] The support 2 is partially disposed within the first through hole 131 and is axially movable relative to it. One end of the support 2 is radially provided with a protrusion 21 that engages with the bent portion 132. The support 2 is axially provided with a second through hole 22 and a third through hole 23 through which the rod portion 11 passes in sequence. The inner diameter of the second through hole 22 is larger than the inner diameter of the third through hole 23.

[0034] The elastic element 3 is disposed in the first through hole 131 and the second through hole 22.

[0035] In the above-described configuration, the knob fastening assembly comprises only three sub-components: a fastening element 1, a support base 2, and an elastic element 3. Compared to existing knob fastening assemblies, this reduces the number of sub-components by two, making the assembly process simpler and more convenient, simplifying the overall structure, requiring less space, and applicable to more scenarios. The reason for reducing the knob fastening assembly to three sub-components is that the cap 13, flange head 12, and rod 11 are directly and integrally connected. Specifically, the cap 13 still has a first through hole 131 along the axial direction, and its bottom end still has a bent portion 132 extending radially inward with an inner diameter smaller than the diameter of the first through hole 131. The outer edge of the flange head 12 is integrally connected to the end of the first through hole 131 away from the bent portion 132. One end of the rod 11 is integrally connected to the inner edge of the flange head 12, and its other end extends axially through the bent portion 132. Part of the support base 2 is still located on... The first through hole 131 is located within the support base 2 and can move axially relative to it. One end of the support base 2 is radially provided with a protrusion 21 that engages with the bent portion 132. The support base 2 is axially provided with a second through hole 22 and a third through hole 23 through which the rod portion 11 passes in sequence. The inner diameter of the second through hole 22 is larger than the inner diameter of the third through hole 23. The inner diameter of the second through hole 22 is smaller than the inner diameter of the first through hole 131. The elastic element 3 is still located within the first through hole 131 and the second through hole 22, and it abuts against the bottom of the second through hole 22, and can be compressed axially relative to the cap body 13. When the fastening element 1 is pressed downward from the top of the riveting fastening assembly, the fastening element 1 can undergo axial displacement relative to the support base 2, so that more of the support base 2 is located within the first through hole 131, thereby exposing the rod portion 11 included in the fastening element 1 from the support base 2 and connecting it with the second workpiece to be connected.

[0036] Please see Figures 1 to 3 Specifically, in the first embodiment, the rod 11, flange head 12 and cap 13 are directly integrally (cold heading) formed, which simplifies the forming process of the knob fastening assembly and has high forming precision, resulting in better bonding force between it and the support base 2.

[0037] Specifically, in this embodiment, the angle formed between the inner wall of the bent portion 132 and the inner wall of the through hole is an obtuse angle to cooperate with the support base 2. Of course, as... Figures 4 to 6 In the second embodiment shown, the included angle between the inner wall of the bent portion 132 and the inner wall of the through hole can also be a right angle.

[0038] Specifically, in this embodiment, the end of the bent portion 132 has a first gap to the outer wall of the support base 2, and the end of the protrusion 21 has a second gap to the inner wall of the through hole. The first gap and the second gap are consistent. The value range of the first gap is 0.15mm to 0.25mm. The value range of the second gap is 0.15mm to 0.25mm. When the screw-fit fastening assembly is pressed, due to the existence of the first gap and the second gap, the cap 13 included in the fastening element 1 and the support base 2 can move axially relative to each other without interference, thereby enabling the screw-fit fastening assembly to be smoothly connected to the second workpiece to be connected.

[0039] Specifically, in this embodiment, a stepped portion 4 is formed between the second through hole 22 and the third through hole 23. One end of the elastic element 3 facing the stepped portion 4 abuts against the stepped portion 4, and the other end abuts against the end face of the flange head 12 facing the rod portion 11. Thus, the elastic element 3 can be compressed axially under the low pressure of the stepped portion 4, allowing the rod portion 11 to protrude from the bottom of the support base 2, thereby achieving a tight connection with the second workpiece. More specifically, in this embodiment, the elastic element 3 is sleeved on the rod portion 11, and the rod portion 11 can also guide the compression of the elastic element 3. The outer wall portion of the rod portion 11 away from the flange head 12 is provided with external threads for connecting the second workpiece.

[0040] Specifically, in this embodiment, the support base 2 has a connecting portion 24 for connecting with the first workpiece at one end away from the protrusion 21, thereby realizing the connection / unlocking of the first workpiece and the second workpiece during the connection / unlocking process of the rod 11 and the second workpiece. Further, in this embodiment, the connection method between the connecting portion 24 and the first workpiece is a press-fit connection. Of course, in other embodiments, the connection method between the connecting portion 24 and the first workpiece may also include, but is not limited to, riveting, welding, fastening, bonding, self-piercing connection, or threaded fastening.

[0041] Specifically, in this embodiment, the end face of the flange head 12 facing away from the rod 11 along the axial direction is flush with the end face of the cap 13 facing away from the rod 11. Of course, as... Figures 4 to 6As shown, in the second embodiment, the flange head 12 protrudes axially from the end face of the rod 11 opposite to the end face of the cap 13 opposite to the rod 11. To better connect the rod 11 to the second workpiece, an internal hexagonal actuating portion may be provided on the end face of the flange head opposite to the rod 11, thereby allowing the fastening element 1 to be tightened / loosened relative to the second workpiece using a tool.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any changes, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A knob fastening assembly, characterized in that, include: A fastening element includes a rod, a flange head, and a cap. The cap has a first through hole arranged axially, and a bent portion at the bottom end of the cap, which extends radially inward. The inner diameter of the bent portion is smaller than the diameter of the first through hole. The outer edge of the flange head is integrally connected to the end of the first through hole away from the bent portion. One end of the rod is integrally connected to the inner edge of the flange head, and the other end extends axially through the bent portion. The support base is partially disposed within the first through hole and is axially movable relative to it. One end of the support base is radially provided with a protrusion that engages with the bent portion. The support base is axially provided with a second through hole and a third through hole through which the rod portion passes in sequence. The inner diameter of the second through hole is larger than the inner diameter of the third through hole. An elastic element is disposed within the first through hole and the second through hole.

2. The knob fastening assembly according to claim 1, characterized in that, The angle formed between the inner wall of the bent portion and the inner wall of the through hole is a right angle or an obtuse angle.

3. The knob fastening assembly according to claim 1, characterized in that, The end of the bent portion has a first gap to the outer wall of the support base, and the end of the protrusion has a second gap to the inner wall of the through hole.

4. The knob fastening assembly according to claim 3, characterized in that, The first gap is consistent with the second gap, and the value range of the first gap is 0.15mm to 0.25mm, and the value range of the second gap is 0.15mm to 0.25mm.

5. The knob fastening assembly according to claim 1, characterized in that, A step is formed between the second through hole and the third through hole. One end of the elastic element facing the step abuts against the step, and the other end abuts against the end face of the flange head facing the rod.

6. The knob fastening assembly according to claim 1, characterized in that, The elastic element is sleeved on the rod.

7. The knob fastening assembly according to claim 1, characterized in that, The outer wall portion of the rod away from the flange head is provided with external threads.

8. The knob fastening assembly according to claim 1, characterized in that, The support base has a connecting part for connecting with the first workpiece at one end away from the protrusion.

9. The knob fastening assembly according to claim 8, characterized in that, The connection method between the connecting part and the first workpiece includes press riveting, riveting, welding, snap fastening, bonding, self-piercing connection or threaded fastening.

10. The knob fastening assembly according to claim 1, characterized in that, The end face of the flange head facing away from the rod along the axial direction is flush with the end face of the cap body facing away from the rod; or... The flange head protrudes axially from the end face opposite to the rod portion of the cap body.

Images