Spring, bushing and fixing device
By combining the limiting section and the clamping section with the bushing, the problems of large space occupation and insufficient fixing strength of the existing spring fixing method are solved, and a more compact and stable spring fixing structure is achieved.
Patent Information
- Application Number
- CN202520040035.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2035-01-07
AI Technical Summary
Existing spring-fixing methods occupy a large amount of structural space in car sunshades, storage curtains, car window curtains, and projection screens, and have insufficient fixing strength, resulting in poor assembly stability and easy loosening or slippage.
The spring and bushing are designed with limiting and clamping sections. The matching of the limiting groove and locking groove restricts the rotation and axial freedom of the spring, enhances the fixing strength, and improves stability through multiple mating structures.
It effectively reduces the space occupied by the structure, enhances the fixing strength, improves the assembly stability, and prevents the spring from slipping off under vibration or force.
Smart Images
Figure CN223563344U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of spring fixing structure, and more particularly to a spring, a bushing and a fixing device. BACKGROUND
[0002] As an important mechanical element, springs are widely used in various devices, especially in scenarios requiring energy storage, buffering or resetting. In devices such as automobile sunshade curtains, storage curtains, car curtain and projection screens, spring structures usually bear the functions of automatic winding or resetting. During the operation of these devices, the spring not only needs to provide sufficient elastic force, but also needs to have high durability and assembly stability.
[0003] At present, the spring fixing methods in the internal structure of the sunshade curtain rotating shaft usually include two forms of winding type and L-shaped hook type. In the winding type spring fixing structure, one end is fixed by winding on the fixed point, and the other end is usually connected to the rotating shaft. Since the winding part occupies a large axial space, it is easy to reduce the compactness of the overall structure. In the L-shaped hook type spring fixing structure, one end of the spring is processed into an L-shaped hook head, which is connected to the fixed point by hanging. Since the L-shaped hook has a high requirement for the structural strength of the fixed point, if the fixed point is not strong enough, the hook may fall off or deform. Therefore, whether it is winding type or L-shaped hook type, it occupies a lot of structure space and has a great impact on the fixing strength and poor assembly stability. CONTENT OF THE INVENTION
[0004] The present application provides a spring, a bushing and a fixing device, which can save the occupation of structure space, reduce the impact on the fixing strength and improve the assembly stability.
[0005] In a first aspect, the present application provides a spring, comprising: a spring body; a limiting section provided at least one end of the spring body and connected with the spring body; and a clamping section provided at one end of the limiting section away from the spring body.
[0006] In an optional solution of the first aspect, the limiting section is integrally formed with the spring body.
[0007] In an optional solution of the first aspect, the limiting section and the spring body are connected in a circular arc transition.
[0008] In an optional solution of the first aspect, the clamping section is integrally formed with the limiting section.
[0009] In an optional solution of the first aspect, the clamping section and the spring body are connected in a circular arc transition.
[0010] In an alternative of the first aspect, further comprising: a bending section, which is arranged at one end of the embracing section opposite to the limiting section and is connected to the embracing section by a circular arc.
[0011] In an alternative of the first aspect, the bending section is integrally formed with the embracing section and is arranged at an angle of more than one half of a circle with respect to the rotating axis.
[0012] In the second aspect, the present application provides a bushing, which is provided with: a limiting slot; and a locking slot, wherein the limiting slot and the locking slot are arranged at at least one end of the main body of the bushing and are connected to each other.
[0013] In an alternative of the second aspect, the bushing is further provided with a bending slot, which is arranged at one end of the bushing opposite to the limiting slot and is connected to the locking slot, wherein the bending slot and the locking slot are arranged at an angle of at least more than one half of a circle with respect to the rotating axis.
[0014] In the third aspect, the present application provides a fixing device, which comprises: the spring and the bushing, wherein the inner radius of the embracing section of the spring is arranged to be not larger than the radius of the locking slot of the bushing, and the spring is at least partially embedded in the bushing for assembly and fixation.
[0015] It should be understood that the general description above and the detailed description below are only exemplary and are not limiting the present application. BRIEF DESCRIPTION OF DRAWINGS
[0016] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate one or more embodiments of the present application and, together with the description, explain the principles of the application and enable a person skilled in the relevant art to make and use the application.
[0017] Figure 1 is a perspective structural schematic diagram of an exemplary fixing device according to some embodiments of the present application.
[0018] Figure 2 is a structural schematic diagram of an exemplary spring according to some embodiments of the present application.
[0019] Figure 3 is a first structural schematic diagram of an exemplary fixing device according to some embodiments of the present application.
[0020] Figure 4 is a cross-sectional structural schematic diagram of an exemplary A-A region according to some embodiments of the present application.
[0021] Figure 5is a second structural schematic view of an exemplary fixing device according to some embodiments of the present application. DETAILED DESCRIPTION
[0022] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example implementations to those skilled in the art. The described features, structures, or characteristics can be combined in one or more implementations. In the following description, numerous specific details are provided to give a thorough understanding of example implementations.
[0023] First, a brief introduction to the spring fixing device applied in the automobile sunshade curtain, storage curtain, car curtain and projection screen equipment.
[0024] Automobile sunshade curtain is usually used to block sunlight, protect the people inside the car from strong light, and keep the temperature inside the car stable. The automobile sunshade curtain needs to be automatically rolled up after use. The common fixing methods of automobile sunshade curtain include winding type and hook type. In the winding type fixing, one end of the spring is wound tightly on the sunshade curtain shaft, and the other end is fixed on the frame or support. In the hook type fixing, the L-shaped hook at the end of the spring is hung on the fixed hole or fulcrum.
[0025] The storage curtain is mainly used to cover the goods in the trunk of the car, and its design usually takes into account aesthetics and practicality, requiring a stable and hidden spring fixing device. Common fixing methods of spring include embedded type and buckle type. In the embedded type fixing, the spring is installed inside the shaft, and the end is embedded in the specially designed slot. In the buckle type fixing, the spring is fixed on the shaft or frame by plastic or metal buckle.
[0026] The car curtain is mainly used to block sunlight, and the spring fixing device directly affects the stretching and rolling performance of the curtain. Common fixing methods of spring include end pin and combination type. In the end pin fixing, the spring is fixed on the frame of the curtain by a pin, and the end of the spring is connected to the shaft. In the combination type fixing, the combination of pin and buckle is used to further enhance the reliability of the fixing.
[0027] Projection screen equipment is widely used in homes, conference rooms and cinemas, and its spring structure is mainly used to automatically roll up the screen for flat storage. Common fixing methods of spring include slot type and lock type. In the slot type fixing, the end of the spring is embedded in the specially designed slot structure, and further reinforced by screws. In the lock type fixing, the end of the spring is locked and fixed by the connection point of the lock structure and the screen shaft.
[0028] However, the spring fixing device applied in the automobile sunshade curtain, storage curtain, seat curtain and projection curtain device usually needs to occupy more structural space in the rotating shaft, which leads to the difficulty in compact design of the overall curtain mechanism, and the spring may slip off due to the loosening of the fixing point in long-term use, affecting the winding function.
[0029] Thus, referring to Figure 1 , Figure 1 An exemplary structural schematic diagram of some embodiments of the present application is shown. The present application relates to a fixing device 1 comprising a spring 2 and a bushing 3, wherein: the spring 2 comprises a spring body 2-1, a limiting section 2-2 and a clamping section 2-3, and the bushing 3 is provided with a limiting groove 3-1 and a locking groove 3-2.
[0030] Specifically, referring to Figure 2 , Figure 2 An exemplary structural schematic diagram of a spring of some embodiments of the present application is shown. The spring body 2-1 is composed of a plurality of spiral coil bodies, each of which can be in contact with each other or maintain a set gap. In actual implementation, the spring body 2-1 can adopt existing high-strength spring steel to ensure the elastic performance and fatigue resistance performance in long-term use. The limiting section 2-2 can be integrally formed with the spring body 2-1 or welded to the spring body 2-1; the clamping section 2-3 can be integrally formed with the limiting section 2-2 or welded to the limiting section 2-2.
[0031] Specifically, referring to Figure 3 and Figure 4 , Figure 3 An exemplary first structural schematic diagram of a fixing device of some embodiments of the present application is shown, Figure 4A cross-sectional structure diagram of an exemplary A-A region of some embodiments of the present application is shown. The limiting groove 3-1 is opened at least one end of the bushing 3, for accommodating the limiting section 2-2 of the spring 2, wherein the depth, width and length dimensions of the limiting groove 3-1 are greater than the dimensions of the limiting section 2-2, to match the limiting groove 3-1 and the limiting section 2-2, to ensure tight fit; the locking groove 3-2 is opened at least one end of the bushing 3, and the locking groove 3-2 is in communication with the limiting groove 3-1, for accommodating the clamping section 2-3 of the spring 2, wherein the depth, width and length dimensions of the locking groove 3-2 are greater than the dimensions of the clamping section 2-3, to match the locking groove 3-2 and the clamping section 2-3, to ensure tight fit, thereby providing stable locking; wherein the material of the bushing 3 can be made of metal material or non-metal material, wherein the metal material can be made of existing metal materials such as stainless steel, aluminum alloy, copper alloy, etc., the non-metal material can be made of existing carbon fiber material, or existing engineering plastics such as polyamide (PA), polycarbonate (PC), polyphenylene ether (PPO or PPE), thermoplastic polyester (PBT, PET), polyethylene (UHMWPE), etc., which is set by the processing personnel according to actual needs.
[0032] Reference Figure 2 In some examples of the present application, the limiting section 2-2 is integrally formed with the spring body 2-1, that is, one end of the spring 2 is bent to form a limiting section 2-2 parallel or not parallel to the center line of the spring body 2-1, wherein a circular arc transition is adopted at the bending of the limiting section 2-2 and the spring body 2-1, that is, a first transition circular arc 2-10 is adopted at the bending of the limiting section 2-2 and the spring body 2-1, and through the setting of the first transition circular arc 2-10, stress concentration leading to fracture is avoided; wherein the shape of the limiting section 2-2 and the shape of the limiting groove 3-1 are matched to tightly fit the limiting section 2-2 and the limiting groove 3-1. Further, the clamping section 2-3 is integrally formed with the limiting section 2-2, that is, the end of the limiting section 2-2 away from the spring body 2-1 is bent to form a clamping section 2-3 of a specific shape, wherein a circular arc transition is adopted at the bending of the clamping section 2-3 and the limiting section 2-2, that is, a second transition circular arc 2-20 is adopted at the bending of the clamping section 2-3 and the limiting section 2-2, and through the setting of the second transition circular arc 2-20, stress concentration leading to fracture is avoided. Wherein the specific shape of the clamping section 2-3 includes semicircular shape, circular arc shape more than one-half of the circumference, etc., to enhance the contact area of the clamping section 2-3 and the locking groove 3-2.
[0033] When a circular arc is used for transition at the bending part of the clamping section 2-3 and the limiting section 2-2, a matching transition arc groove can be arranged at the connection part of the limiting groove 3-1 and the locking groove 3-2 of the bushing 3, or it can be directly arranged as a rectangular groove, which is set by the processing personnel according to actual needs. The arc angle and arc style of the first transition arc 2-10 and the second transition arc 2-20 are set by the processing personnel according to actual needs.
[0034] Therefore, in the actual implementation process, the assembly process of the fixing device 1 is as follows:
[0035] The limiting section 2-2 of the spring 2 is aligned with the limiting groove 3-1 of the bushing 3, and then the limiting section 2-2 is at least partially embedded in the limiting groove 3-1 of the bushing 3, and the rotation freedom of the spring 2 and the bushing 3 in the axial direction is limited by the cooperation of the limiting section 2-2 and the limiting groove 3-1;
[0036] The clamping section 2-3 of the spring 2 is aligned with the locking groove 3-2 of the bushing 3, and then the clamping section 2-3 is at least partially embedded in the locking groove 3-2 of the bushing 3, and the freedom of the spring 2 and the bushing 3 in the axial direction is limited by the cooperation of the clamping section 2-3 and the locking groove 3-2, and the fixing strength is provided by the locking;
[0037] After the spring 2 and the bushing 3 are assembled, the fixing device 1 is formed, and the fixing stability of the spring 2 and the bushing 3 is ensured by the double action of limiting and locking, and the falling caused by external force or vibration is reduced.
[0038] Reference Figure 3 and Figure 4 In some embodiments of the present application, the clamping section 2-3 of the spring 2 is arranged as a semicircle, and the locking groove 3-2 of the bushing 3 is arranged as a matching semicircular groove.
[0039] Specifically, the arc of the clamping section 2-3 is arranged to have an angle A of more than one-half of a circle with respect to the rotation axis, and the locking groove 3-2 is arranged to have an angle A of more than one-half of a circle with respect to the rotation axis, which plays a role of the spring 2 hooking the cylindrical surface of the bushing 3; and the inner radius R1 of the clamping section 2-3 is arranged to be not greater than the cylindrical radius R2 of the locking groove 3-2, which can enhance the adhesion and locking force of the spring 2 and the bushing 3, while not affecting the smoothness of the assembly process.
[0040] Therefore, in the actual implementation process, the assembly process of the fixing device 1 is as follows:
[0041] The limiting section 2-2 of the spring 2 is aligned with the limiting groove 3-1 of the bushing 3, and then the limiting section 2-2 is at least partially embedded in the limiting groove 3-1 of the bushing 3, so that the rotation freedom of the spring 2 and the bushing 3 is limited through the cooperation of the limiting section 2-2 and the limiting groove 3-1;
[0042] The semicircular clamping section 2-3 is aligned with the semicircular locking groove 3-2 of the bushing 3, and then the semicircular clamping section 2-3 is at least partially embedded in the semicircular locking groove 3-2, so that the semicircular clamping section 2-3 is in contact with the arc surface of the locking groove 3-2, and the fixing strength of the spring 2 and the bushing 3 is enhanced through the wrapping effect of more than half the circumference of the locking groove 3-2;
[0043] After assembly, the limiting section 2-2 and the limiting groove 3-1 limit the rotation freedom, the clamping section 2-3 and the locking groove 3-2 enhance the locking force, so that the spring 2 and the bushing 3 are tightly combined, and the problems of loosening or slipping are reduced.
[0044] Through the above technical scheme, the semicircular design of the clamping section 2-3 and the locking groove 3-2 and the cooperation of more than half the circumference of the angle can improve the locking strength of the spring 2; and the cooperation of the limiting section 2-2 and the limiting groove 3-1 limits the rotation freedom, and the cooperation of the clamping section 2-3 and the locking groove 3-2 limits the axial freedom, so that the stability of the fixing device 1 is ensured through double limitation.
[0045] At present, the spring fixing device applied to the automobile sunshade curtain, storage curtain, seat curtain and projection screen equipment, the spring 2 is only fixed through local contact, and cannot realize multi-point support, that is, the contact area of the spring 2 and the matching groove is small, the friction force is insufficient, and the spring fixing device cannot effectively resist the axial or radial external force, so that the spring 2 is easy to slip in the vibration or stress state; and the end of the spring 2 of the spring fixing device is mainly linear or simply bent, lacks complex locking arrangement, and cannot provide sufficient reaction force to limit the movement and falling of the spring 2.
[0046] Therefore, in order to reduce the problems of movement and falling of the spring 2 of the fixing device 1 in the use state, reference Figure 5 is made to Figure 5 The second structure schematic view of an exemplary fixing device according to some embodiments of the present application is shown. In some embodiments of the present application, the spring 2 is further provided with a bending section 2-4, which is arranged at one end of the clamping section 2-3 away from the limiting section 2-2; and the bushing 3 is further provided with a bending groove 3-3, which is arranged at one end of the bushing 3 away from the limiting groove 3-1 and is in communication with the locking groove 3-2.
[0047] Specifically, the bent section 2-4 and the clamping section 2-3 can be integrally formed, or the bent section 2-4 and the clamping section 2-3 can be welded and connected, and the bent section 2-4 can be formed into a specific shape;示例性的, in this application, refer to Figure 2 As shown, the bent section 2-4 and the spring body 2-1 of the clamping section 2-3 are integrally formed, that is, the end of the clamping section 2-3 relatively far from the spring body 2-1 is bent to form a bent section 2-4 parallel or non-parallel to the center line of the limiting section 2-2. Among them, at the bent part of the bent section 2-4 and the clamping section 2-3, an arc transition is adopted, that is, a third transition arc 2-30 is adopted at the bent part of the bent section 2-4 and the clamping section 2-3. Through the setting of the third transition arc 2-30, stress concentration leading to fracture is avoided, thereby improving the structural strength. Further, the bent section 2-4 and the clamping section 2-3 are set to have an angle A relative to the winding axis exceeding half a circumference.
[0048] Specifically, the bent groove 3-3 is provided in a matching manner with the bent section 2-4, that is, the shape of the bent groove 3-3 is the same as that of the bent section 2-4, and the depth, width and length dimensions of the bent groove 3-3 are set to be larger than the dimensions of the limiting section 2-2, so as to facilitate the embedding of the bent section 2-4 into the bent groove 3-3; when the center line of the bent section 2-4 is parallel to the center line of the limiting section 2-2, the center line of the bent groove 3-3 is parallel to the center line of the limiting groove 3-1, and when the center line of the bent section 2-4 is not parallel to the center line of the limiting section 2-2, the center line of the bent groove 3-3 is not parallel to the center line of the limiting groove 3-1;示例性的, in this application, refer to Figure 5 As shown, the center line of the bent section 2-4 is parallel to the center line of the limiting section 2-2, and the center line of the bent groove 3-3 is parallel to the center line of the limiting groove 3-1. Further, the bent groove 3-3 and the locking groove 3-2 are set to have an angle A relative to the winding axis at least exceeding half a circumference.
[0049] Among them, when an arc transition is adopted at the bent part of the bent section 2-4 and the clamping section 2-3, at the connection of the locking groove 3-2 and the bent groove 3-3 of the bushing 3, a matching transition arc groove can be provided, or it can be directly set as a rectangular groove, which is specifically set by the processing personnel according to actual needs. Among them, the arc angle and arc style of the third transition arc 2-30 are set by the processing personnel according to actual needs.
[0050] Thus, in the actual implementation process, the assembly process of the fixing device 1 is as follows: <00The limiting section 2-2 of the spring 2 is aligned with the limiting groove 3-1 of the bushing 3, and then the limiting section 2-2 is at least partially embedded in the limiting groove 3-1 of the bushing 3, so that the rotation freedom of the spring 2 and the bushing 3 in the axial direction is limited through the cooperation of the limiting section 2-2 and the limiting groove 3-1.
[0052] The semicircular clamping section 2-3 is aligned with the semicircular locking groove 3-2 of the bushing 3, and then the semicircular clamping section 2-3 is at least partially embedded in the semicircular locking groove 3-2, so that the semicircular clamping section 2-3 is attached to the arc surface of the locking groove 3-2, and the fixing strength of the spring 2 and the bushing 3 is enhanced through the wrapping effect of more than one-half of the circumference of the locking groove 3-2.
[0053] The bending section 2-4 is aligned with the bending groove 3-3 of the bushing 3, and then the bending section 2-4 is at least partially embedded in the bending groove 3-3, so that the spring 2 is further prevented from coming out of the bushing 3, and the stability and convenience of assembly are improved through the cooperation of the bending section 2-4 and the bending groove 3-3.
[0054] Through the above technical scheme, the fixing device 1 has high stability in the axial and rotational directions through the multiple cooperation of the limiting section 2-2, the clamping section 2-3, and the bending section 2-4 with the corresponding groove positions of the bushing 3, and the anti-disengagement capability of the spring 2 in the bushing 3 is further enhanced through the cooperation of the bending section 2-4 and the bending groove 3-3, which meets the use requirements in complex environments.
[0055] Therefore, in some choices of the present application, in order to simplify the design description of the fixing device 1 of the present application, the setting description of the bending section 2-4 and the bending groove 3-3 can be cancelled, that is, by re-describing the structure of the spring 2 and the bushing 3, the functions of the original bending section 2-4 and the clamping section 2-3 are combined and unified as the clamping section 2-3, and the functions of the original bending groove 3-3 and the locking groove 3-2 are combined and unified as the locking groove 3-2.
[0056] Specifically, when the bending section 2-4 of the spring 2 is combined with the clamping section 2-3, referring to FIG. 2, the clamping section and the subsequent region are all set as the clamping section 2-3 (that is, 2-3 and 2-4 in FIG. 2 are all set as the clamping section); when the bending groove 3-3 of the bushing 3 is combined with the locking groove 3-2, referring to FIG. 3, the locking groove and the subsequent region in the bushing 3 are all set as the locking groove 3-2 (that is, 3-2 and 3-2 in FIG. 3 are all set as the locking groove). Figure 2 Figure 2 Figure 5 Figure 5
[0057] In some applications of the present application, the spring 2 and the bushing 3 can be used separately or assembled and fixed to form the fixing device 1, and the spring 2 or the bushing 3 or the fixing device 1 can be applied to the crank structure of the automobile sunshade curtain, the storage curtain, and the car curtain, or applied to the projection curtain winding structure, or applied to other similar curtain winding structures, and the specific setting is determined by the user according to the actual needs.
[0058] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
[0059] Explanation of reference signs:
[0060] 1 fixing device
[0061] 2 spring
[0062] 3 bushing
[0063] 2-1 spring body
[0064] 2-10 first transition arc
[0065] 2-2 limiting section
[0066] 2-20 second transition arc
[0067] 2-3 holding section
[0068] 2-30 third transition arc
[0069] 2-4 bending section
[0070] 3-1 limiting groove
[0071] 3-2 locking groove
[0072] 3-3 bending groove
Claims
1. A spring (2) characterized in that, It comprises: a spring body (2-1); a limiting section (2-2) provided at at least one end of the spring body (2-1) and connected with the spring body (2-1); a clamping section (2-3) provided at an end of the limiting section (2-2) away from the spring body (2-1).
2. The spring (2) according to claim 1, characterized in that The limiting section (2-2) is integrally formed with the spring body (2-1).
3. The spring (2) according to claim 1 or 2, characterized in that The limiting section (2-2) and the spring body (2-1) are connected in a circular arc transition.
4. The spring (2) according to claim 2, characterized in that The clamping section (2-3) is integrally formed with the limiting section (2-2).
5. The spring (2) according to claim 2 or 4, characterized in that The clamping section (2-3) and the spring body (2-1) are connected in a circular arc transition.
6. The spring (2) according to claim 2 or 4, characterized in that It further comprises: a bending section (2-4) provided at an end of the clamping section (2-3) away from the limiting section (2-2) and connected with the clamping section (2-3) in a circular arc transition.
7. The spring (2) according to claim 6, characterized in that The bending section (2-4) and the clamping section (2-3) are integrally formed, and the angle between the bending section (2-4) and the clamping section (2-3) relative to the rotation axis is more than one-half of a circle.
8. A bushing (3) fitted with the spring (2) according to any one of claims 1-7, characterized in that, The bushing (3) is provided with: a limiting groove (3-1); a locking groove (3-2); wherein The limiting groove (3-1) and the locking groove (3-2) are both provided at at least one end of the main body of the bushing (3) and are connected with each other.
9. The bushing (3) according to claim 8, characterized in that The bushing (3) is further provided with a bending groove (3-3) provided at an end of the bushing (3) away from the limiting groove (3-1) and connected with the locking groove (3-2), wherein The angle between the bending groove (3-3) and the locking groove (3-2) relative to the rotation axis is at least more than one-half of a circle.
10. A fixture (1) characterized in that It comprises: the spring (2) of any one of claims 1-7; the bushing (3) of any one of claims 8-9; wherein The inner radius of the clamping section (2-3) of the spring (2) is not greater than the radius of the locking groove (3-2) of the bushing (3), and the spring (2) is at least partially embedded in the bushing (3) for assembly and fixation.