Rotary snap assembly

Abstract

This utility model discloses a rotary snap-fit ​​assembly, including a base and a snap-fit. The base has an inlet, and the snap-fit ​​has a limiting end. An obstacle is provided around the inlet of the base, and the obstacle has a guide surface facing the inlet. In use, the snap-fit ​​extends into the base through the inlet via the limiting end, and by rotating, the limiting end is limited by the obstacle to the base via the guide surface. This can optimize the snap-fit ​​assembly structure in the prior art, overcome the defects of the current damage-prone assembly structure, and improve the assembly yield of the parts.

Description

Technical Field

[0001] This utility model relates to the field of component snap-fit ​​assembly, specifically to a rotary snap-fit ​​assembly. Background Technology

[0002] In automobile production, the main way to connect two parts is by screwing. However, when two parts do not require a high-strength connection, especially when the parts are made of non-metallic materials such as plastic or rubber, it is time-consuming and laborious to use screwing. It is better to use snap-fit ​​connections instead.

[0003] In the prior art, taking the connection between sheet metal and door trim as an example, the door trim snap assembly is used to connect the sheet metal part and the door trim. The door trim snap assembly includes a seat located on the sheet metal part and a snap that is limited by the seat. When in use, the snap limits the door trim, so that the door trim is assembled on the sheet metal part.

[0004] The latch has a stop for limiting the latch, and the latch has a limiting end that engages with the latch. During use, the latch is pushed along the opening of the stop to complete the installation of the door panel latch assembly. When assembling the door panel on the sheet metal, it is pushed into the latch's engaging end along the corresponding mounting hole on the door panel. In this structure, the limiting end is clamped in the latch, preventing the latch and latch from shifting perpendicular to the opening of the stop. However, since the stop is used not only for assembling the latch but also for limiting its position, it protrudes inward at the opening of the stop to form a flange, making the inlet size of the stop smaller, thus limiting the latch and latch. After the parts are engaged, the snap fastener is prevented from shifting outward. Due to the presence of the flange, the two mating parts are assembled by pressing at the flange position of the stop. This makes assembly difficult and prone to damage, and can easily lead to unreliable assembly, separation of the snap fastener and the seat. Furthermore, this type of snap fastener assembly with a limiting function has strict requirements on assembly dimensions. If the dimensions of one of the parts are abnormal (the flange is too large or too small, making it difficult or impossible to assemble the snap fastener, and vice versa), the assembly of the two parts will fail, and product quality and yield will be difficult to control.

[0005] Therefore, to solve the above problems, a rotary snap-fit ​​assembly is needed that can optimize the structure of snap-fit ​​assemblies in the existing technology, overcome the defects of the current snap-fit ​​assembly structure, and improve the assembly yield of the parts. Utility Model Content

[0006] In view of this, the purpose of this utility model is to overcome the defects in the prior art and provide a rotary snap-fit ​​assembly that can optimize the structure of snap-fit ​​assemblies in the prior art, overcome the defects of the current snap-fit ​​assembly structure, and improve the assembly yield of the parts.

[0007] The present invention relates to a rotary buckle assembly, comprising a base and a buckle, wherein the base has an inlet and the buckle has a limiting end; the base has an obstacle around the inlet, and the obstacle has a guide surface facing the inlet.

[0008] In use, the buckle extends into the card seat through the inlet via the limiting end, and is limited by an obstacle in the card seat by rotation via the guide surface.

[0009] Furthermore, the root of the obstacle is provided on the card holder, and the head of the obstacle protrudes from the card holder;

[0010] The guide surface includes a curved or inclined surface formed by the inward convergence of the root of the obstacle toward the head.

[0011] Furthermore, the obstacle also has an anti-rotation surface that is angled to the guide surface. The anti-rotation surface is located behind the guide surface along the rotation direction of the limiting end. After the limiting end passes the guide surface, it is limited by the anti-rotation surface of the obstacle.

[0012] Furthermore, the limiting end has an upper limiting surface and a lower limiting surface. After the limiting end extends into the inlet, the upper limiting surface is located on the outer end face of the inlet, and the lower limiting surface is located on the inner end face of the inlet. By rotating the buckle, the limiting end is clamped onto the card seat through the limiting surface and the lower limiting surface.

[0013] Furthermore, the cross-section of the limiting end is in the shape of an "I", with the bottom surface of the upper flange plate of the "I" shape serving as the upper limiting surface and the top surface of the lower flange plate of the "I" shape serving as the lower limiting surface. In use, the opening of the "I" shape clamps the card seat.

[0014] Furthermore, the inlet has a long side and a short side with different lengths;

[0015] The length of the "I"-shaped lower flange plate is between the long side and the short side of the inlet, the width of the "I"-shaped lower flange plate does not exceed the short side of the inlet, and the length of the "I"-shaped upper flange plate exceeds the short side of the inlet.

[0016] This allows the lower flange of the limiting end to extend into the inlet during use, and after being driven to rotate, to clamp the card holder through the opening of the "I" shape at the limiting end.

[0017] Furthermore, the card holder includes a mounting plate, an inlet is formed on the mounting plate, and the obstacle is formed by the bottom surface of the mounting plate protruding downwards;

[0018] The lower flange has a transition surface located at its upper edge;

[0019] During use, the transition surface passes through the guide surface, and the lower flange is limited by the obstacle.

[0020] Furthermore, the card holder also includes a relief cavity located inside the mounting plate, with an inlet penetrating the mounting plate and communicating with the relief cavity, and the lower flange plate being driven to rotate within the relief cavity.

[0021] Furthermore, the obstacle includes at least a pair of opposing limiting protrusions, each of which has a guide surface facing the inlet;

[0022] One side of each pair of limiting protrusions forms a limiting groove with the bottom surface of the mounting plate to limit the lower flange plate.

[0023] Furthermore, the buckle also has a snap-fit ​​end, which is used to snap-fit ​​and assemble a preset component onto the buckle.

[0024] The beneficial effects of this utility model are as follows: The rotary buckle assembly disclosed in this utility model improves the matching form between the buckle and the seat. By using the flange of the inlet to limit the buckle around the seat, the buckle will not detach from the seat in the circumferential direction of the inlet after being limited in the seat. By setting the obstacle, the limiting end of the buckle is limited in the seat by the obstacle through the guide surface. In this state, the buckle assembly direction is limited, and the obstacle can prevent the buckle from swinging or rotating, thereby fixing the seat and the buckle. The assembly process of the buckle and seat in this solution is optimized from a plug-in matching to a rotary matching, which will not damage the structure of the buckle and seat, and the assembly is simple. At the same time, the matching accuracy of the buckle and seat is reduced, and it is not subject to strict size restrictions, thereby enabling effective control of product quality and yield. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0026] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0028] Figure 3 This utility model Figure 1 A top-view structural diagram;

[0029] Figure 4 This utility model Figure 3 A schematic diagram of the AA-direction structure;

[0030] Figure 5 This utility model Figure 3 Schematic diagram of the BB-oriented structure;

[0031] Figure 6 This utility model Figure 1A schematic diagram of the structure viewed from below.

[0032] Reference numerals: 1. Card holder; 2. Buckle; 3. Inlet; 4. Guide surface; 5. Conical clip; 6. Limiting plate; 7. Limiting skirt; 8. Top support cavity; 9. Mounting plate; 10. Relief cavity; 11. Baffle; 12. Lower flange plate; 13. Anti-rotation surface; 14. Transition surface; 15. Limiting protrusion. Detailed Implementation

[0033] Figures 1-6 As shown in the figure, the rotary buckle assembly in this embodiment includes a seat 1 and a buckle 2. The seat 1 has an inlet 3, and the periphery of the inlet 3 forms a retaining flange. The buckle 2 has a limiting end. An obstacle is provided around the inlet 3 in the seat 1. The obstacle has a guide surface 4 facing the inlet 3. In use, the buckle 2 extends into the seat 1 through the inlet 3 through the limiting end, and the limiting end is limited to the seat 1 by the obstacle through the guide surface 4 by rotation. This solution improves the fit between the card holder 1 and the buckle 2. The buckle 2 is limited around the card holder 1 by the flange of the inlet 3, preventing it from detaching from the card holder 1 circumferentially after being positioned. An obstacle is placed so that the limiting end of the buckle 2 is confined to the card holder 1 via the guide surface 4. In this state, the assembly direction of the buckle 2 is limited, and the obstacle prevents the buckle 2 from swinging or rotating, thus fixing the card holder 1 and the buckle 2. This solution optimizes the assembly process of the buckle 2 and card holder 1 from a plug-in fit to a rotational fit, without damaging the structure of the buckle 2 and card holder 1. Assembly is simple, and the fitting precision of the buckle 2 and card holder 1 is reduced, eliminating strict dimensional limitations. This allows for effective control of product quality and yield.

[0034] In this embodiment, as Figure 1 , Figure 4 and Figure 5 As shown, the buckle 2 also has a snap-fit ​​end. When in use, the buckle seat 1 is fixed to the preset component, and the buckle 2 is assembled on the buckle seat 1. The snap-fit ​​end is used to snap-fit ​​another preset component onto the buckle 2, so that the two preset components are assembled. The snap-fit ​​end can be any snap-fit ​​limiting structure, such as cantilever, hook, cone, or tower type, to achieve the purpose of snap-fit ​​assembly of corresponding components. It will not be elaborated here. The snap-fit ​​end of this solution is a cone-shaped buckle 5. A limiting plate 6 is set at the bottom of the cone-shaped buckle 5, and the edge of the limiting plate 6 gradually extends towards the top of the cone-shaped buckle 5 to form a limiting skirt 7. A top support cavity 8 is formed between the limiting skirt 7 and the top surface of the limiting plate 6. The top support cavity 8 is cone-shaped with a large top and a small bottom. When in use, the preset component assembled on the buckle 2 is limited by the cone-shaped buckle 5, and the top support cavity 8 provides support for the preset component, resulting in better structural reliability. The limiting end is connected to the bottom of the snap-fit ​​end, specifically located at the bottom of the limiting plate 6.

[0035] In this embodiment, as Figure 1 , Figure 4 and Figure 5 shown, the card seat 1 includes a mounting plate 9. The card seat 1 further includes a relief cavity 10 located inside the mounting plate 9. The lead-in port 3 penetrates through the plate surface of the mounting plate 9 and communicates with the relief cavity 10. Specifically, the lead-in port 3 is formed on the mounting plate 9. The periphery of the bottom of the mounting plate 9 is blocked by a plurality of baffles 11. A relief cavity 10 with an open bottom is formed between the plurality of baffles 11 and the mounting plate 9. During use, the plurality of baffles 11 are arranged on preset components. The relief cavity 10 is used to provide a rotation space for the limiting end, so as to improve the assembly efficiency, reduce the contact friction, make the installation smoother and more convenient, and enable the product quality and the finished product rate to be effectively controlled.

[0036] In this embodiment, as Figure 4 and Figure 5 shown, the limiting end has opposite upper limiting surfaces and lower limiting surfaces. After the limiting end extends into the lead-in port 3, the upper limiting surface is located at the outer end surface of the lead-in port 3, and the lower limiting surface is located at the inner end surface of the lead-in port 3. The side close to the relief cavity 10 is the inner side, and the opposite side is the outer side, which will not be elaborated here. Rotate the rotating buckle 2, and the limiting end is arranged on the card seat 1 in a clamping manner through the limiting surface and the lower limiting surface. In this solution, the cross-section of the limiting end is in the shape of a "worker". The bottom surface of the upper flange plate of the "worker" shape is the upper limiting surface, and the top surface of the lower flange plate of the "worker" shape is the lower limiting surface. During use, the open part of the "worker" clamps the card seat 1. This makes the limiting reliability of the overall rotating buckle 2 better and the stability stronger. Of course, the cross-section of the limiting end can also be in the shape of a "Z" or a "匚", etc., with a structure having opposite upper limiting surfaces and lower limiting surfaces, which will not be elaborated here.

[0037] In this embodiment, as Figures 1-6As shown, the inlet 3 has long and short sides of unequal lengths. In this design, the inlet 3 is rectangular with long and short sides. In practical applications, it can be elliptical or an irregular hole structure with long and short sides, etc., which will not be elaborated here. The length of the "I"-shaped lower flange plate 12 is between the long and short side dimensions of the inlet 3, and the width of the "I"-shaped lower flange plate 12 does not exceed the short side dimension of the inlet 3. In this design, the "I"-shaped lower flange plate 12 conforms to the shape of the inlet 3. The top surface of the lower flange plate 12 serves as the lower limiting surface, and the edge dimension of the lower flange plate 12 is smaller than the edge dimension of the inlet 3. Specifically, the edge dimension of the "I"-shaped lower flange plate 12 is 3mm smaller than the edge dimension of the inlet 3, so that the lower flange plate 12 at the limiting end can effectively extend into the inlet 3 during use, and the assembly tolerance is relatively large. To reduce manufacturing difficulty and improve assembly efficiency and effectiveness; the length of the "I"-shaped upper flange plate exceeds the short side dimension of the inlet 3; the upper flange plate mainly serves as a clamping and limiting function, and it is only necessary to ensure that it exceeds the short side dimension of the inlet 3. Specifically, the "I"-shaped upper flange plate is a limiting plate 6 with an elliptical cross section. The major axis and minor axis of the ellipse are both larger than the short side dimension of the inlet 3, so that only the lower flange plate 12 in the buckle 2 can extend into the inlet 3. The major axis of the ellipse and the long side of the lower flange plate 12 are correspondingly parallel, and the minor axis of the ellipse and the short side of the lower flange plate 12 are correspondingly parallel.

[0038] During the rotation of the lower flange plate 12 within the clearance cavity 10, the upper flange plate continuously supports the top surface of the mounting plate 9, serving as a guide and preventing the limiting end from sinking into the inlet 3. This improves the assembly reliability of the buckle 2 and the mounting base 1 and reduces assembly difficulty. The top surface of the limiting plate 6 serves as the bottom of the top support cavity 8, and the bottom surface of the limiting plate 6 serves as the upper limiting surface, resulting in a more compact overall structure and a more reliable connection. In use, the lower flange plate 12 of the limiting end extends into the inlet 3, and the upper flange plate is supported by the outer end face of the inlet 3. After the buckle 2 is driven to rotate, the mounting base 1 is clamped through the opening of the "I" shape at the limiting end.

[0039] In this embodiment, the web connecting the upper flange plate and the lower flange plate 12 of the "I" shape is cylindrical. The diameter of the cylindrical web is similar to, and does not exceed, the short side dimension of the inlet 3, thereby improving the structural strength. The upper limit surface and the lower limit surface are slightly larger than the thickness of the mounting plate 9. Generally, this dimension is controlled within 3mm on each side, specifically 2mm, to meet the limiting function and the functions of convenient and effective assembly. This will not be elaborated further here.

[0040] In this embodiment, the limiting end and the snap-fit ​​end are integrally formed, which improves the structural reliability.

[0041] In this embodiment, as Figure 2 , Figure 5 and Figure 6As shown, the root of the obstacle is set on the card holder 1, and the head of the obstacle protrudes from the card holder 1; the guide surface 4 includes a curved surface or inclined surface formed by the root of the obstacle converging inward towards the head. The obstacle is used to guide the limiting end to rotate to a set position and limit the limiting end to the set position of the card holder 1. The guide surface 4 can further improve the smoothness of the limiting end rotating through the obstacle and prevent rotation jamming. The guide surface 4 can be a spherical surface, curved surface, or slope surface, etc., which will not be described in detail here.

[0042] In this embodiment, as Figure 2 , Figure 5 and Figure 6 As shown, the obstacle also has an anti-rotation surface 13 at an angle to the guide surface 4. The anti-rotation surface 13 is located behind the guide surface 4 along the rotation direction of the limiting end. The position where the limiting end first contacts the obstacle is called the front, and the position that contacts it last is called the rear, which will not be described in detail here. After the limiting end passes the guide surface 4, it is limited by the anti-rotation surface 13 of the obstacle. The anti-rotation surface 13 is used to enhance the limiting ability of the limiting end, reduce the movement of the buckle 2 on the card seat 1, and improve the structural stability.

[0043] In this embodiment, as Figure 2 , Figure 5 and Figure 6 As shown, the obstacle is formed by the bottom surface of the mounting plate 9 protruding downwards; of course, in actual applications, the obstacle can also be formed by the top surface of the mounting plate 9 protruding upwards, or the obstacle can be set on both the top and bottom surfaces of the mounting plate 9, so as to achieve the function of limiting the corresponding upper or lower flange plate 12. This will not be elaborated further here.

[0044] like Figure 4 As shown, the lower flange plate 12 has a transition surface 14 located at its upper edge; in use, the transition surface 14 passes through the guide surface 4, and the lower flange plate 12 is limited by the obstacle. The transition surface 14 is an inclined surface located on the short side of the lower flange plate 12, and the inclined surface slopes outward from top to bottom. Both short sides of the lower flange plate 12 have transition surfaces 14, which further improves the smoothness of the lower flange plate 12 when rotating through the guide surface 4, reduces the driving force, improves the convenience and efficiency of assembly, and also achieves the purpose of non-damaging assembly of the buckle 2 and the seat 1.

[0045] In this embodiment, as Figure 2 , Figure 5 and Figure 6 As shown, the obstacle includes at least a pair of opposing limiting protrusions 15, each limiting protrusion 15 having a guide surface 4 facing the inlet 3; the opposite side of the pair of limiting protrusions 15 forms a limiting groove with the bottom surface of the mounting plate 9 for limiting the lower flange plate 12.

[0046] Specifically, the obstacle includes two pairs of opposing limiting protrusions 15, each pair of limiting protrusions 15 being positioned opposite each other along the long side of the inlet 3 on the corresponding side of the inlet 3; each limiting protrusion 15 is a quarter hemisphere, the spherical surface of the hemisphere being the guide surface 4, and the hemisphere perpendicular to the long side of the inlet 3 being the anti-rotation surface 13; there are four limiting protrusions 15 in total, arranged corresponding to the four corners facing the inlet 3, with each hemisphere corresponding to a corner facing the inlet 3; the opposing straight surfaces of a pair of limiting protrusions 15 are the anti-rotation surfaces 13, and the opposing anti-rotation surfaces 13 of a pair of limiting protrusions 15 form a... The limiting groove used to limit the lower flange plate 12 is U-shaped at the end face of the long side of the inlet 3. The opening of the limiting groove faces downward and the side wall is perpendicular to the long side of the inlet 3. The dimensions of the two opposing anti-rotation surfaces 13 are slightly larger than the dimensions of the short side of the lower flange plate 12. Generally, the dimensions on each side are controlled within 3mm, specifically 2mm, to meet the limiting function and the functions of convenient and effective assembly. This will not be elaborated further here. After the obstacle limits the lower flange plate 12, the two pairs of limiting protrusions 15 are located at the two ends of the long side of the lower flange plate 12. Each pair of limiting protrusions 15 limits the lower flange plate 12 by clamping.

[0047] In this design, the obstacle includes two pairs of limiting protrusions 15, which allow the lower flange plate 12 to be guided in any direction within the clearance cavity 10 to the limiting groove formed by the two anti-rotation surfaces 13 and the bottom surface of the mounting plate 9 through the corresponding guide surface 4. During guidance, the transition surfaces 14 at both ends of the long side of the lower flange plate 12 are guided, improving the smoothness of rotation. After the lower flange plate 12 rotates, it can also be stably limited to the mounting plate 9 through the limiting groove, avoiding the risk of rotational detachment and resulting in higher structural reliability.

[0048] In this embodiment, as Figure 6 As shown, the bottom surface of the limiting protrusion 15 is a plane. The guide surface 4 of the limiting protrusion 15 and the anti-rotation surface 13 of the limiting protrusion 15 are transitioned through this plane. This plane is used to enhance the supporting and limiting capabilities of the limiting protrusion 15 on the lower flange plate 12, prevent the rotational reverse slip, and improve the convenience and safety of the rotation operation.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A rotary clasp assembly, characterized by: It includes a card holder and a buckle. The card holder has an inlet, and the buckle has a limiting end. The card holder has an obstacle around the inlet, and the obstacle has a guide surface facing the inlet. In use, the buckle extends into the card seat through the inlet via the limiting end, and is limited by an obstacle in the card seat by rotation via the guide surface.

2. The rotating clasp assembly of claim 1, wherein: The root of the obstacle is set on the card holder, and the head of the obstacle protrudes from the card holder; The guide surface includes a curved or inclined surface formed by the inward convergence of the root of the obstacle toward the head.

3. The rotating clasp assembly of claim 1, wherein: The obstacle also has an anti-rotation surface that is angled to the guide surface. The anti-rotation surface is located behind the guide surface along the rotation direction of the limiting end. After the limiting end passes the guide surface, it is limited by the anti-rotation surface of the obstacle.

4. The rotating clasp assembly of claim 1, wherein: The limiting end has an upper limiting surface and a lower limiting surface. After the limiting end extends into the inlet, the upper limiting surface is located on the outer end face of the inlet, and the lower limiting surface is located on the inner end face of the inlet. By rotating the buckle, the limiting end is clamped onto the card seat through the limiting surface and the lower limiting surface.

5. The rotating clasp assembly of claim 4, wherein: The cross-section of the limiting end is in the shape of an "I". The bottom surface of the upper flange plate of the "I" shape is the upper limiting surface, and the top surface of the lower flange plate of the "I" shape is the lower limiting surface. When in use, the opening of the "I" shape clamps the card seat.

6. The rotating clasp assembly of claim 5, wherein: The inlet has a long side and a short side of different lengths; The length of the "I"-shaped lower flange plate is between the long side and the short side of the inlet, the width of the "I"-shaped lower flange plate does not exceed the short side of the inlet, and the length of the "I"-shaped upper flange plate exceeds the short side of the inlet. This allows the lower flange of the limiting end to extend into the inlet during use, and after being driven to rotate, to clamp the card holder through the opening of the "I" shape at the limiting end.

7. The rotating clasp assembly of claim 5, wherein: The card holder includes a mounting plate, an inlet is opened on the mounting plate, and the obstacle is formed by the bottom surface of the mounting plate protruding downwards; The lower flange has a transition surface located at its upper edge; During use, the transition surface passes through the guide surface, and the lower flange is limited by the obstacle.

8. The rotating clasp assembly of claim 7, wherein: The card holder also includes a relief cavity located inside the mounting plate, with an inlet penetrating the mounting plate and communicating with the relief cavity, and the lower flange plate being driven to rotate within the relief cavity.

9. The rotating clasp assembly of claim 1, wherein: The obstacle includes at least a pair of opposing limiting protrusions, each of which has a guide surface facing the inlet; One side of each pair of limiting protrusions forms a limiting groove with the bottom surface of the mounting plate to limit the lower flange plate.

10. The rotary clasp assembly of claim 1, wherein: The buckle also has a snap-fit ​​end, which is used to snap-fit ​​and assemble a preset component onto the buckle.

Images