Plastic pivoting shaft
By designing a plastic pivot shaft with U-shaped slit groove, the problem of recycling and use stability of makeup boxes is solved, dimensional stability and recycling are achieved, and it is widely applicable, suitable for existing makeup boxes and reduces the cost of purchasing machines. .
Patent Information
- Application Number
- CN202421305998.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-06-11
AI Technical Summary
The plastic cover and base of the existing cosmetic box cannot be recycled together due to different materials, and the plastic pins are thermally expanded and contracted due to temperature changes, resulting in unstable pivot connections, which affects use.
A plastic pivot joint is designed, which is a solid cylinder with a U-shaped slit, made by injection molding, providing thermal expansion and cold shrink margin space, improving compression performance and rebound force, and is suitable for existing metal pins size and nailing machine.
The dimensional stability of the plastic pivot joint is achieved, which enhances the convenience of use and recycling, avoids recycling problems, and reduces the cost of purchasing machines.
Smart Images
Figure CN222315665U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a plastic pivot shaft, in particular to a plastic pivot shaft with anti-deformation function. Background Art
[0002] The existing cosmetic box has a plastic cover and a base. The cover and the base are respectively provided with pivot holes and are fixedly connected by a metal pin. Usually, consumers directly hand over the entire cosmetic box for recycling after use. However, due to the difference in materials, the recycling company must first remove the pin for recycling separately, and cannot recycle it together with the plastic cover and base to avoid damage to the recycling equipment, which also causes trouble for the recycling company.
[0003] In view of this, the applicant has developed a plastic pin pivotally mounted on the cover and base of a cosmetic box and its application to address the above shortcomings. The above metal pin is replaced with a pin made of plastic. Since the pin, the cover and the base are all made of plastic, they can be recycled as a whole to solve the recycling problem.
[0004] However, the volume of the plastic pin is easily expanded and contracted due to temperature changes. When the temperature is high, the volume of the pin expands, and the pivot hole that penetrates the cover and the base will be enlarged by the pin. When the temperature rises, the volume of the pin returns to its original state, but the pivot hole has been expanded and shaped, so a gap will be generated between the pin and the pivot hole, and effective friction cannot be generated with the cover, resulting in the cover being unable to maintain a position at any specific angle when opened, causing inconvenience in use.
[0005] Therefore, based on the applicant's many years of experience in manufacturing, developing and designing related products, the applicant has designed and carefully evaluated the above-mentioned goals and finally obtained a practical utility model. Utility Model Content
[0006] The utility model aims to provide a plastic pivot shaft, which has a simple structure and is easy to operate. It is made of plastic to solve the problem of recycling, is easy to deform and improves resilience, improves compression performance, and ensures structural strength.
[0007] To achieve the above object, the utility model discloses a plastic pivot shaft, which is characterized by comprising:
[0008] A main body, which is made of plastic material and is a solid cylinder, has a groove, wherein the depth of the groove extends from the outer periphery of the main body to the center of the main body so that the groove is formed with a bottom and a top arranged oppositely, and the width of the groove gradually expands from the bottom to the two sides of the groove to the top so that the bottom of the groove is U-shaped.
[0009] The main body is made by injection molding.
[0010] The diameter of the body is between 1.4 mm and 3.5 mm.
[0011] The bottom of the cut groove has a first width, and the top has a second width, and the second width is greater than the first width.
[0012] The first width is 0.3 mm.
[0013] The second width is 0.38 mm.
[0014] By the above structure, the utility model has the following advantages:
[0015] 1. The diameter of the body is not affected by thermal expansion and contraction: The body of the utility model is provided with the split groove, and the setting of the split groove can provide a margin space for the body when it expands and contracts, so its diameter is hardly changed by the thermal expansion and contraction, and at the same time, the compression performance of the body can be improved.
[0016] 2. Easy to deform and improve resilience: Since the depth of the groove extends from the outer periphery of the body to the center of the body, and the width gradually expands from the bottom to the two sides of the groove to the top, the body is in a bow shape, which makes it easier to deform and improve the resilience, while maintaining the structural strength of the body (solid cylinder).
[0017] 3. Wide applicability and easy recycling: Since the size of the main body is equivalent to that of existing metal pins, it can be directly applied to the pivotal connection between the lid and the base of the existing cosmetic box, and the nailing machine originally used for metal pins can be used for the push-nail assembly without the need to develop a new nailing machine. Therefore, the plastic pivot shaft of the utility model has a wide range of applicability. In addition, since the main body and the lid and base of the cosmetic box are all made of plastic, the whole can be recycled together when discarded, thereby solving the problem of difficult recycling. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a three-dimensional diagram of a preferred embodiment of the utility model.
[0019] Figure 2 It is a front view of a preferred embodiment of the utility model.
[0020] Figure 3 This is a stereoscopic diagram of a preferred embodiment of the present invention combined with a cosmetic box.
[0021] Figure 4 This is an exploded view of a preferred embodiment of the present invention combined with a cosmetic case.
[0022] Figure 5This is a cross-sectional view of a preferred embodiment of the utility model combined with a cosmetic box. DETAILED DESCRIPTION
[0023] See also Figure 1 and Figure 2 , which are a stereoscopic view and a front view of a preferred embodiment of the utility model, disclose a plastic pivot shaft, which includes:
[0024] A main body 10, which is made of plastic material and is a solid cylinder. In the embodiment of the utility model, the diameter of the main body 10 is between 1.4 mm and 3.5 mm. The main body 10 is provided with a groove 11 and is made by injection molding, wherein the depth of the groove 11 extends from the outer periphery of the main body 10 to the center of the main body 10, so that the groove 11 is formed with a bottom 111 and a top 112 arranged opposite to each other, and the width of the groove 11 gradually expands from the bottom 111 toward the two sides of the groove 11 toward the top 112, and the bottom 111 of the groove 11 is U-shaped.
[0025] In addition, the bottom 111 of the groove 11 (close to the center of the main body 10) has a first width W1, which is 0.3 mm, and the top 112 of the groove 11 (close to the outer periphery of the main body 10) has a second width W2, which is 0.38 mm. The second width W2 is greater than the first width W1.
[0026] See also Figures 3 to 5 And with Figure 1 As shown, the utility model adopts two plastic pivot shafts when in use, and is applied to a makeup box 20, wherein the form and state of the makeup box 20 can have different kinds of changes, and are not limited to the disclosure of this embodiment. In the embodiment of the utility model, the makeup box 20 has a cover body 21 and a base 22, and the cover body 21 is provided with a pivot portion 211 extending downward on one side of the periphery, and an axial hole 212 is respectively penetrated at both ends of the axial direction of the pivot portion 211, and the base 22 can be relatively covered with the cover body 21, and a notch 221 is formed at the periphery of the base 22 corresponding to the position of the pivot portion 211, and a through hole 222 is respectively penetrated on both sides of the notch 221 and corresponding to the position of each of the axial holes 212, each of the through holes 222 is communicated with each of the axial holes 212, and each of the main bodies 10 is penetrated in each of the through holes 222 and each of the axial holes 212, so that the cover body 21 is pivoted on the base 22.
[0027] Since each of the main bodies 10 is made of plastic material and has a diameter slightly larger than the diameter of each of the through holes 222 and each of the shaft holes 212, after each of the main bodies 10 is inserted into each of the through holes 222 and each of the shaft holes 212, a certain friction force can be generated between the cover body 21 and the surface of each of the main bodies 10 when opened, so that the cover body 21 can be maintained at any opening angle without falling toward the base 22, thereby improving the convenience of use.
[0028] In addition, the provision of the slot 11 can not only enhance the compression performance of the main body 10 and make it easier for the main body 10 to be inserted into the through hole 222 and the axial hole 212, but more importantly, can provide a margin space for the main body 10 to expand and contract due to heat, thereby preventing the main body 10 from expanding and contracting in volume due to different temperatures. Therefore, its diameter will hardly change, so the through hole 222 and the axial hole 212 will not be enlarged. Therefore, no gap will be generated between the main body 10 and the through hole 222 and the axial hole 212, and effective friction can still be generated with the cover body 21, so that the cover body 21 can be maintained at any specific angle after opening without falling toward the base 22.
[0029] Furthermore, since the depth of the groove 11 extends from the outer periphery of the main body 10 to the center of the main body 10, and the width gradually expands from the bottom 111 toward the two sides of the groove 11 to the top 112, the main body 10 is in a bow shape, which makes it easier for the main body 10 to deform and improve the resilience, while maintaining the structural strength of the main body 10 (solid cylinder).
[0030] It is worth mentioning that, when the lid and the base of the existing cosmetic box are assembled, a nailing machine (not shown) is used to push a metal pin into the pivot hole fixed to the lid and the base, so that the lid is pivoted to the base. The diameter of the main body 10 of the utility model is between 1.4 mm and 3.5 mm, which can directly replace the existing metal pin. Therefore, when the lid 21 and the base 22 are assembled, the nailing machine can be used to push each main body 10 into each through hole 222 and each shaft hole 2 12, to complete the assembly, there is no need to make another new nailing machine, so as to reduce the cost of purchasing the machine, and because the size of the main body 10 is relatively small, it can be directly applied to the pivot hole of the cover and the base of the existing cosmetic box, without affecting the aesthetics of the joint, so the plastic pivot shaft of the utility model has a wide range of applicability. In addition, because the main body 10 and the cover 21 and the base 22 of the cosmetic box 20 are all made of plastic material, the whole can be recycled together when discarded, so as to solve the problem of difficult recycling.
Claims
1. A plastic pivot shaft, characterized in that Contains: A main body, which is made of plastic material and is a solid cylinder, has a groove, wherein the depth of the groove extends from the outer periphery of the main body to the center of the main body so that the groove is formed with a bottom and a top arranged oppositely, and the width of the groove gradually expands from the bottom to the two sides of the groove to the top so that the bottom of the groove is U-shaped.
2. The plastic pivot shaft according to claim 1, characterized in that: The body is made by injection molding.
3. The plastic pivot shaft according to claim 1, characterized in that: The diameter of the body is between 1.4 mm and 3.5 mm.
4. The plastic pivot shaft according to claim 1, wherein: The bottom of the slot has a first width, and the top has a second width, which is greater than the first width.
5. The plastic pivot shaft according to claim 4, characterized in that: The first width is 0.3 mm.
6. The plastic pivot shaft according to claim 4, characterized in that: The second width is 0.38 mm.