Knob cap and knob electronics assembly

Abstract

The application provides a knob cap and a knob electronic device assembly. The knob cap is used for sleeving one end of a knob electronic device. The knob cap comprises an inner cap, a plurality of elastic walls and an arc-shaped metal elastic sheet. A connecting groove is formed in the middle of the inner cap. The plurality of elastic walls are arranged in the connecting groove at intervals. The plurality of elastic walls are connected to the groove bottom of the connecting groove and surround the side of the groove wall away from the connecting groove to form a sleeving position for sleeving the knob electronic device. The inner cap and the plurality of elastic walls are formed by one-time injection molding of a first plastic material. The arc-shaped metal elastic sheet is sleeved between the connecting groove and the plurality of elastic walls and abuts against the plurality of elastic walls. The two ends of the arc-shaped metal elastic sheet can approach and move away from each other. The knob cap of the application is tightly fastened with the knob electronic device and has high reliability. The knob cap will not be cracked or fall off.

Description

Technical Field

[0001] This application relates to the field of knob technology, and more particularly to a knob cap and a knob electronic device assembly. Background Technology

[0002] A knob electronic component generally includes a knob cap and a knob electronic component. The knob electronic component includes a rotating shaft made of metal material, and the knob cap is fitted over one end of the rotating shaft.

[0003] In conventional rotary electronic components, the knob cap and the rotary electronic component are securely connected by an interference fit between the inner ring plastic and the rotating shaft. However, when the interference fit between the inner ring plastic and the rotating shaft is too small, the friction between them is insufficient to resist external forces such as rotation and vibration during daily use, making the knob cap prone to loosening. On the other hand, an excessive interference fit will cause the rotating shaft to exert strong reaction stress on the inner ring plastic. Over time, under continuous stress, the inner ring plastic will gradually undergo plastic deformation, leading to cracks and ultimately causing the knob cap to crack and become unusable. All of these situations ultimately affect the normal functioning of the product.

[0004] To address the issue of knob cap cracking, some existing technologies embed a metal ring inside the knob cap, utilizing the rigidity of the metal ring to distribute the stress transmitted by the rotating shaft, thereby reducing the likelihood of the knob cap cracking. However, the metal ring is a metal component with a typically smooth surface. When it mates with the rotating shaft, which is also made of metal, the coefficient of friction between the two is significantly reduced. This can cause the knob cap to still easily detach, resulting in a less than ideal connection between the knob cap and the knob's electronic components.

[0005] It is important to note that the techniques described in this section are not necessarily those previously conceived or adopted. Unless otherwise specified, no technique described in this section should be assumed to be prior art simply because it is included in this section. Similarly, unless otherwise specified, the issues mentioned in this section should not be considered to be recognized in any prior art. Utility Model Content

[0006] This application provides a knob cap and a knob electronic component assembly, aiming to solve the technical problem of poor connection between the knob cap and the knob electronic component.

[0007] The first aspect of this application provides a knob cap, the knob cap being used to attach to one end of a knob electronic device, the knob cap comprising:

[0008] The inner cap has a connecting groove in the middle;

[0009] Multiple elastic walls are spaced apart and connected within the connecting groove. Each elastic wall is connected to the bottom of the connecting groove, and the elastic walls are spaced apart from the groove walls. A socket is formed on the side of each elastic wall facing away from the groove wall, and this socket is used to fit the rotary electronic device. The inner cap and the multiple elastic walls are formed by a single injection molding process using a first plastic material.

[0010] An arc-shaped metal spring is sleeved between the groove wall of the connecting groove and the plurality of elastic walls. The arc-shaped metal spring abuts against the plurality of elastic walls, and the two ends of the arc-shaped metal spring can move closer to each other and further away.

[0011] Optionally, a plurality of elastic walls are provided with integrally injection-molded connecting protrusions on the side opposite to the arc-shaped metal spring sheet, and the plurality of connecting protrusions are used to fasten and connect the knob electronic device.

[0012] Optionally, the arc-shaped metal spring has an arc shape between full enclosure and semi enclosure, and the shape of the arc-shaped metal spring is adapted to the shape of the part of the knob electronic device located within the socket.

[0013] Optionally, the middle portions of both ends of the arc-shaped metal spring are bent toward the elastic wall opposite to them to form clamping portions, and the two clamping portions clamp the elastic wall opposite to them respectively.

[0014] Optionally, the portion of the arc-shaped metal spring near its two ends is provided with an opening, the opening being adjacent to the clamping portion, and the opening being used to assist the two ends of the arc-shaped metal spring in bending to form the clamping portion.

[0015] Optionally, the number of elastic walls is three, the extension direction of the elastic walls is consistent with the extension direction of the arc-shaped metal sheet, the middle part of the arc-shaped metal sheet surrounds two of the elastic walls, and the two ends of the arc-shaped metal sheet are located in the middle of the remaining elastic wall.

[0016] Optionally, the knob cap includes:

[0017] The outer cap is formed by secondary injection molding of a second plastic material onto the outside of the inner cap, and the Young's modulus of the outer cap is smaller than that of the inner cap.

[0018] Optionally, the knob cap includes:

[0019] A buffer pad is connected to the bottom of the connecting groove and located within the socket position. The buffer pad is used to buffer the movement of the knob electronics within the socket position.

[0020] A second aspect of this application provides a rotary electronic device assembly, the rotary electronic device assembly comprising:

[0021] Knob electronics, including a rotating shaft; and

[0022] In any of the above-mentioned knob caps, the sleeve is detachably sleeved to one end of the rotating shaft.

[0023] The knob cap of this application adopts a unique design with two reshaped rubber positions and an arc-shaped metal spring. The outer rubber position is a connecting groove formed by hollowing out the inner cap, and the inner rubber position is a socket formed by multiple elastic walls. The arc-shaped metal spring is located between the outer rubber position and the inner rubber position. The inner rubber position (i.e., the socket) is the core mating structure for connecting with the electronic components of the knob.

[0024] The multiple elastic walls constituting the inner adhesive area are arranged at intervals, a design that provides ample deformation space for the elastic walls made of plastic. When the knob electronics are inserted into the inner adhesive area (i.e., the socket), the squeezing force generated by the contact between the knob electronics and the elastic walls causes each elastic wall to open slightly outward. Because there are gaps between the elastic walls, they do not restrain each other, allowing the inherent toughness of the plastic material to be fully utilized. This enables the material to undergo appropriate elastic deformation in response to external forces, effectively preventing tearing or breakage due to excessive force and ensuring the structural integrity of the inner adhesive area.

[0025] The curved metal springs located on the outer sides of multiple elastic walls form a stable support barrier. When the elastic wall deforms due to insertion, it abuts against the curved metal springs. The curved metal springs, with their own rigidity and elasticity, provide uniform and continuous counter-support force to the elastic wall. This support neither restricts the necessary deformation of the elastic wall to adapt to installation requirements, nor restricts the elastic wall from always tightly fitting the knob electronics, maintaining a secure connection. Even under prolonged use, frequent insertion and removal, or vibration, the support of the curved metal springs stably maintains the clamping force of the elastic wall, preventing loosening due to excessive deformation and plastic cracking caused by excessive rigidity, achieving a perfect balance between elastic adaptation and fastening performance. The curved metal springs also provide a buffering effect through their own elastic deformation, offering appropriate elastic space during the installation and removal of the knob electronics, making operation more convenient and effortless.

[0026] Therefore, compared with the traditional interference fit or metal ring design, the knob cap of this application has many advantages: (1) while ensuring the connection strength, it retains an appropriate amount of room for movement, so that installation and disassembly do not require force, which greatly improves the ease of operation; (2) the overall structure design is simple, which reduces the difficulty of mold design, reduces production links, and reduces manufacturing costs; (3) the knob cap and the knob electronic device are firmly fastened, and the knob cap will not crack or fall off, so the product has high stability and reliability.

[0027] It should be understood that the description in this section is not intended to identify key or important features of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0028] The accompanying drawings exemplify embodiments and form part of the specification, working together with the textual description to explain exemplary implementations of the embodiments. The drawings shown are for illustrative purposes only and do not limit the scope of the claims. Throughout the drawings, the same reference numerals refer to similar but not necessarily identical elements.

[0029] Figure 1 This is a perspective view of an embodiment of the knob electronic device assembly of this application;

[0030] Figure 2a for Figure 1 A cross-sectional view of the embodiment shown; Figure 2b for Figure 1 Exploded view of the embodiment shown;

[0031] Figure 3a for Figure 1 Exploded view of the knob cap in the illustrated embodiment; Figure 3b for Figure 1 A bottom view of the knob cap in the illustrated embodiment;

[0032] Figure 4 for Figure 1 The diagram shows a view of the outer cap from below in the illustrated embodiment;

[0033] Figure 5a for Figure 1 Top view of the inner cap in the illustrated embodiment; Figure 5b for Figure 1 A bottom view of the inner cap in the illustrated embodiment;

[0034] Figure 6a and Figure 6b They are respectively Figure 1 Diagrams showing different angles of the arc-shaped metal spring in the illustrated embodiment;

[0035] Figure 7 for Figure 1 A perspective view of the knob electronics in the illustrated embodiment.

[0036] Explanation of reference numerals in the attached figures:

[0037]

[0038] Detailed Implementation

[0039] To make the inventive objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. The term "multiple" means two or more, unless otherwise explicitly specified. The term "comprising" indicates the presence of the described feature, whole, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or sets thereof. The term "and / or" describes the relationship between related objects, indicating that three relationships may exist. For example, A and / or B may include three cases: A existing alone, A and B existing simultaneously, and B existing alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship.

[0042] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art; the terms used in the embodiments of this application are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification, claims and foregoing description of the drawings of this application are intended to cover non-exclusive inclusion.

[0043] Furthermore, terms such as "exemplary," "for example," and "optional" are used to indicate illustrative purposes. Any technical solution described by the above terms in the embodiments of this application should not be construed as being more preferred or advantageous than other technical solutions. Specifically, these terms are intended to present the relevant technical concepts in terms of specific implementation methods.

[0044] This application discloses a knob cap for securing rotary electronic components. This knob cap is applicable not only to devices employing rotary electronic components as generally required, but also particularly to devices requiring frequent operation and needing protection against accidental detachment, such as household appliances and industrial equipment. Specific product types include, but are not limited to, smartphones / PDAs / feature phones / POS machines, tablets / laptops, automotive electronics, household appliances, healthcare equipment, walkie-talkies, various types of handheld wireless communication control terminals / industrial equipment, and cabinet-type control panels.

[0045] The knob cap provided in this application is used to attach to one end of the rotating shaft of a rotary electronic device. The knob cap may include an inner cap, multiple elastic walls, and an arc-shaped metal spring. A connecting groove is formed in the center of the inner cap. Multiple elastic walls are spaced apart within the connecting groove, each connected to the bottom of the groove. The multiple elastic walls and the groove wall are spaced apart. The side of the multiple elastic walls facing away from the groove wall forms a fitting position for attaching the rotary electronic device. The inner cap and multiple elastic walls are formed by one-time injection molding using a first plastic material. The arc-shaped metal spring is fitted between the groove wall of the connecting groove and the multiple elastic walls, abutting against the multiple elastic walls. The two ends of the arc-shaped metal spring can move closer to or further away from each other.

[0046] The knob cap of this application adopts a unique design with two reshaped rubber positions and an arc-shaped metal spring. The outer rubber position is a connecting groove formed by hollowing out the inner cap, and the inner rubber position is a socket formed by multiple elastic walls. The arc-shaped metal spring is located between the outer rubber position and the inner rubber position. The inner rubber position (i.e., the socket) is the core mating structure for connecting with the electronic components of the knob.

[0047] The multiple elastic walls constituting the inner adhesive section (i.e., the socket) are arranged at intervals, a design that provides ample deformation space for the elastic walls made of plastic. When the knob electronic component is inserted into the inner adhesive section (i.e., the socket), the squeezing force generated by the contact between the knob electronic component and the elastic walls will cause each elastic wall to open slightly outward. Because there are gaps between the elastic walls, they do not restrain each other, allowing the inherent toughness of the plastic material to be fully utilized. This allows for appropriate elastic deformation in response to external force, effectively preventing tearing or breakage due to excessive force and ensuring the structural integrity of the inner adhesive section.

[0048] The curved metal springs located on the outer sides of multiple elastic walls form a stable support barrier. When the elastic wall deforms due to insertion, it abuts against the curved metal springs. The curved metal springs, with their own rigidity and elasticity, provide uniform and continuous counter-support force to the elastic wall. This support neither restricts the necessary deformation of the elastic wall to adapt to installation requirements, nor restricts the elastic wall from always tightly fitting the knob electronics, maintaining a secure connection. Even under prolonged use, frequent insertion and removal, or vibration, the support of the curved metal springs stably maintains the clamping force of the elastic wall, preventing loosening due to excessive deformation and plastic cracking caused by excessive rigidity, achieving a perfect balance between elastic adaptation and fastening performance. The curved metal springs also provide a buffering effect through their own elastic deformation, offering appropriate elastic space during the installation and removal of the knob electronics, making operation more convenient and effortless.

[0049] Therefore, compared with the traditional interference fit or metal ring design, the knob cap of this application has many advantages: (1) while ensuring the connection strength, it retains an appropriate amount of room for movement, so that installation and disassembly do not require force, which greatly improves the ease of operation; (2) the overall structure design is simple, which reduces the difficulty of mold design, reduces production links, and reduces manufacturing costs; (3) the knob cap and the knob electronic device are firmly fastened, and the knob cap will not crack or fall off, so the product has high stability and reliability.

[0050] Please combine Figures 1 to 7 The specific structure of the knob cap 100 of this application is described below.

[0051] The knob cap 100 of this application includes an inner cap 120, which can be frustum-shaped or cylindrical. The outer wall of the inner cap 120 is provided with a plurality of inserts 122 integrally formed therewith. A connecting groove 121 is formed in the middle of the inner cap 120. The connecting groove 121 can also be frustum-shaped or cylindrical. The shape of the connecting groove 121 is adapted to the shape of one end of the rotating shaft 210. The size of the connecting groove 121 is larger than the size of one end of the rotating shaft 210. The connecting groove 121 is an outer adhesive position.

[0052] The knob cap 100 of this application includes multiple elastic walls 130, which are spaced apart from each other within a connecting groove 121. The multiple elastic walls 130 are spaced apart from the groove wall of the connecting groove 121, and one side of each elastic wall 130 is connected to the bottom of the connecting groove 121. The sides of the multiple elastic walls 130 facing away from the groove wall of the connecting groove 121 enclose a fitting position 131. The shape of the fitting position 131 is adapted to the shape of one end of the rotating shaft 210. The fitting position 131 is used to fit one end of the knob electronic device 200, and is an inner fitting position. The elastic walls 130 can be arc-shaped plates. The shape of a conventional rotating shaft 210 is generally an irregular cylinder, and the shape of the elastic walls 130 is adapted to the shape of the rotating shaft 210; that is, the shapes of the multiple elastic walls 130 are not completely identical. It should also be noted that for some unconventional rotating shafts 210, the shape of the elastic walls 130 is also adapted to the shape of the rotating shaft 210. The inner cap 120 and the multiple elastic walls 130 are formed by injection molding of the first plastic material in one step. The inner cap 120 and the multiple elastic walls 130 are the core load-bearing components of the knob cap 100, and need to have a certain structural strength to ensure stable cooperation with other components. The plastic material selected can meet the basic strength requirements and reduce production costs.

[0053] The multiple elastic walls 130 constituting the inner adhesive position (i.e., the socket 131) are arranged in a spaced-apart layout. This design provides ample deformation space for the elastic walls 130 made of plastic. When the knob electronic device 200 is inserted into the inner adhesive position (i.e., the socket 131), the squeezing force generated by the contact between the knob electronic device 200 and the elastic walls 130 will cause each elastic wall 130 to open slightly outward. Since there are gaps between the elastic walls 130, they will not restrain each other, and the toughness of the plastic material itself can be fully utilized. It can produce appropriate elastic deformation with external force, effectively avoiding tearing or breakage due to excessive force, and ensuring the structural integrity of the inner adhesive position (i.e., the socket 131 formed by multiple elastic walls 130).

[0054] In some embodiments, the number of elastic walls 130 can be three. This choice of number conforms to the principles of structural mechanics while also considering connection stability and practicality. The three elastic walls 130 form a triangular support, which can evenly distribute the force borne by each elastic wall 130, avoiding deformation imbalance or structural damage caused by excessive local stress. At the same time, the layout of the three elastic walls 130 can minimize material redundancy while ensuring a reasonable contact area, and can form a more comprehensive fit with the rotation axis 210 of the knob electronic device 200, improving friction and engagement force, and ensuring smooth installation and stability during use.

[0055] One side of each of the multiple elastic walls 130 is provided with an integrally injection-molded connecting protrusion 132. The connecting protrusion 132 is located on the side of the multiple elastic walls 130 opposite to the groove wall of the connecting groove 121 (i.e., the arc-shaped metal spring 140 mentioned later). The multiple connecting protrusions 132 are used to fasten and connect the knob electronic device 200. The peripheral wall of the conventional rotating shaft 210 is generally recessed inward to form an annular groove 211, and the multiple connecting protrusions 132 can be respectively fastened and connected to different parts of the annular groove 211.

[0056] The knob cap 100 of this application includes an arc-shaped metal spring 140, which is sleeved between the groove wall of the connecting groove 121 and multiple elastic walls 130, that is, the arc-shaped metal spring 140 is located between the outer and inner adhesive positions. The arc-shaped metal spring 140 abuts against the side of the multiple elastic walls 130 facing the groove wall of the connecting groove 121, and the two ends of the arc-shaped metal spring 140 can move closer to each other and further away. The arc-shaped metal spring 140 can be made of materials such as stainless steel, iron-based materials and / or copper alloys, and this application is not limited to these. The material for making the arc-shaped metal spring 140 can be flexibly selected according to the specific use environment of the knob cap 100 (e.g., whether rust prevention is required, the requirement for elastic strength, etc.).

[0057] The arc-shaped metal springs 140 located on the outer side of the multiple elastic walls 130 form a stable support barrier. When the elastic wall 130 deforms due to insertion, it abuts against the arc-shaped metal springs 140. The arc-shaped metal springs 140, with their own rigidity and elasticity, provide uniform and continuous counter-support force to the elastic wall 130. This support does not restrict the necessary deformation of the elastic wall 130 to adapt to installation requirements, and ensures through elastic feedback that the elastic wall 130 always fits tightly against the knob electronics 200, maintaining a secure connection between the two. Even under long-term use, frequent insertion and removal, or vibration, the support of the arc-shaped metal springs 140 can stably maintain the clamping force of the elastic wall 130, avoiding loosening of the connection due to excessive deformation and preventing plastic cracking caused by excessive rigidity, achieving a perfect balance between elastic adaptation and fastening performance. The curved metal spring 140 also provides a buffering effect through its own elastic deformation, providing appropriate elastic space during the installation and removal of the knob electronics 200, making operation more convenient and effortless.

[0058] The curved metal spring 140 has an arc shape between a full enclosure and a semi-enclosed enclosure. The shape of the curved metal spring 140 matches the shape of the part of the knob electronic device 200 located within the socket 131 (i.e., one end of the rotating shaft 210). The curved metal spring 140 can be approximately C-shaped. It should be noted that because the shape of the conventional rotating shaft 210 is not a regular cylinder, the shape of the curved metal spring 140 can be an irregular C-shape.

[0059] In some embodiments, the middle portions of both ends of the arc-shaped metal spring 140 are bent toward the opposite elastic wall 130 to form clamping portions 141, and the two clamping portions 141 clamp the opposite elastic wall 130 respectively. Thus, by firmly clamping the corresponding elastic wall 130 with the two clamping portions 141, the support and fixing effect of the arc-shaped metal spring 140 on the elastic wall 130 can be enhanced. When the elastic wall 130 deforms due to the insertion of the knob electronics 200, the clamping portions 141 can synchronously generate adaptive small displacements following the movement of the elastic wall 130, while continuously providing a uniform clamping force to the elastic wall 130. This avoids relative sliding between the arc-shaped metal spring 140 and the elastic wall 130, which would affect the support effect, and also allows the elastic force of the arc-shaped metal spring 140 to be more accurately transmitted to the elastic wall 130 through clamping. In addition, the bending-formed clamping part 141 can enhance the structural stability of the arc-shaped metal spring 140 itself, making it less prone to deformation or breakage under long-term stress, further improving the support reliability of the multiple elastic walls 130 on the inner rubber part, and ensuring the service life of the entire knob cap 100 structure.

[0060] In the above embodiments, the curved metal spring 140 has openings 142 near its two ends, which are adjacent to the clamping portions 141. The openings 142 assist in bending the two ends of the curved metal spring 140 to form the clamping portions 141. During the processing of the curved metal spring 140, when it is necessary to bend the middle of both ends towards the corresponding elastic wall 130 to form the clamping portions 141, the openings 142 can effectively disperse the stress generated during bending, preventing the curved metal spring 140 from cracking or breaking due to excessive local stress. At the same time, the presence of the openings 142 can also provide more flexible deformation space for the bending of the two ends of the curved metal spring 140, making it easier to control the bending angle and curvature of the clamping portions 141, thereby ensuring that the two clamping portions 141 can accurately and firmly clamp with the corresponding elastic wall 130. Furthermore, during the use of the knob cap 100, when the arc-shaped metal spring 140 elastically expands and contracts due to the deformation of the elastic wall 130, the opening 142 can also help the arc-shaped metal spring 140 better adapt to this deformation, reduce the fatigue wear of the arc-shaped metal spring 140 itself, further extend its service life, and thus ensure the stability and reliability of the support for the inner rubber position (that is, the socket position 131 formed by multiple elastic walls 130).

[0061] The extension direction of the elastic wall 130 is adapted to the shape of the rotating shaft 210, and the shape of the arc-shaped metal spring 140 is also adapted to the shape of the rotating shaft 210. Therefore, the extension direction of the elastic wall 130 is basically consistent with the extension direction of the arc-shaped metal spring 140. In an embodiment with three elastic walls 130, the middle part of the arc-shaped metal spring 140 surrounds two of the elastic walls 130, and the two ends of the arc-shaped metal spring 140 are located in the middle of the remaining elastic wall 130. The arc-shaped metal spring 140 surrounds two adjacent elastic walls 130, and the clamping portions 141 at both ends of the arc-shaped metal spring 140 are clamped to the outer wall of the remaining elastic wall 130. This allows each of the three elastic walls 130 to receive targeted support from the arc-shaped metal spring 140, ensuring the stability of the two elastic walls 130 surrounded in the middle during deformation, and preventing displacement or shaking when subjected to force by clamping and fixing the third elastic wall 130 at both ends. Meanwhile, combined with the opening 142 on the arc-shaped metal spring 140, the spring can more flexibly adapt to the deformation of the three elastic walls 130 due to different degrees of deformation during installation or use. The central area of ​​the arc-shaped metal spring 140 can elastically expand and contract with the deformation of the two elastic walls 130, while the two ends of the arc-shaped metal spring 140, with the assistance of the opening 142, allow the clamping part 141 to better fit the deformation of the third elastic wall 130, thereby providing balanced and reliable elastic support for the three elastic walls 130 as a whole. This further improves the structural strength and service life of the inner glue position (i.e., the socket position 131) and ensures the stability of the connection between the knob cap 100 and the knob electronics 200.

[0062] This application's knob cap 100 includes an outer cap 110. The outer cap 110 is formed by secondary injection molding of a second plastic material onto the outer cap 120. The outer cap 110 can be frustum-shaped or cylindrical. The Young's modulus of the outer cap 110 is smaller than that of the inner cap 120. The outer cap 110 is made of soft plastic material, while the inner cap 120 is made of hard plastic material. Under the same external force, the outer cap 110 can produce greater elastic deformation. This combination of material properties allows the outer cap 110 to better cushion external impacts during daily use. At the same time, the relatively soft nature of the outer cap 110 also improves the tactile feel during operation. In addition, due to the difference in material elasticity between the outer cap 110 and the inner cap 120, the deformation differences between them under the influence of environmental factors such as temperature changes can be coordinated, avoiding problems such as loosening of the connection due to inconsistent deformation, further enhancing the overall structural stability and reliability of the knob cap 100.

[0063] The secondary injection molding process of the outer cap 110 is as follows: First, the inner cap 120 and multiple elastic walls 130 are prepared by one injection molding. After the inner cap 120 and multiple elastic walls 130 are cured and shaped, they are placed into a new mold as inserts for a second injection molding. The material of the outer cap 110 (a second plastic with a smaller Young's modulus) wraps the outer wall of the inner cap 120 under high temperature and pressure. By forming a molecular-level bond with the surface of the inner cap 120, the outer cap 110 seamlessly wraps the inner cap 120. As a result, the connection strength between the outer cap 110 and the inner cap 120 is relatively high, and the overall structural stability and service life of the knob cap 100 are relatively high.

[0064] The knob cap 100 of this application includes a buffer pad 150, which is connected to the bottom of the connecting groove 121 and located within the socket 131. The buffer pad 150 is used to buffer the movement of the knob electronic device 200 within the socket 131. The buffer pad 150 can be made of flexible materials such as silicone, plastic, rubber, or fiber. When the knob electronic device 200 is inserted into the socket 131 and mates with the inner adhesive part, the buffer pad 150 will contact the end of the device. In daily use, the knob electronic device 200 may experience slight movement within the socket 131 due to factors such as vibration and changes in operating force. The buffer pad 150, with its elastic properties, can effectively absorb the impact force generated by these movements, providing a good buffering effect. This not only reduces the hard collision between the rotating shaft 210 and the socket 131, reducing the risk of wear, but also avoids abnormal noise caused by movement, improving the overall user experience. Meanwhile, the presence of the buffer pad 150 can also form a certain flexible constraint on the rotating shaft 210 in the axial direction. Through its cooperation with the connecting protrusion 132 on the elastic wall 130, the positioning effect of the rotating shaft 210 in the socket 131 is further enhanced, making the connection between the knob cap 100 and the knob electronic device 200 more stable and reliable.

[0065] Please combine Figures 1 to 7 This application also provides a knob electronic device assembly 10, which includes a knob electronic device 200 and the aforementioned knob cap 100. The knob electronic device 200 includes a rotating shaft 210, with a sleeve 131 detachably sleeved to one end of the rotating shaft 210. The rotating shaft 210 can be a conventional design, with its cross-sectional shape generally between a circle and a D-shape, and its peripheral wall recessed inward to form an annular groove 211. The knob electronic device assembly 10 includes the aforementioned knob cap 100, and therefore possesses all the beneficial effects of the aforementioned knob cap 100, as detailed above; further reiteration is omitted here.

[0066] The above embodiments are only used to illustrate the present application and are not intended to limit it. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included within the protection scope of the present application.

Claims

1. A knob cap, characterized in that, The knob cap is used to attach to one end of the knob electronic device, and the knob cap includes: The inner cap has a connecting groove in the middle; Multiple elastic walls are spaced apart and connected within the connecting groove. Each elastic wall is connected to the bottom of the connecting groove, and the elastic walls are spaced apart from the groove walls. A socket is formed on the side of each elastic wall facing away from the groove wall, and this socket is used to fit the rotary electronic device. The inner cap and the multiple elastic walls are formed by a single injection molding process using a first plastic material. An arc-shaped metal spring is sleeved between the groove wall of the connecting groove and the plurality of elastic walls. The arc-shaped metal spring abuts against the plurality of elastic walls, and the two ends of the arc-shaped metal spring can move closer to each other and further away.

2. The knob cap according to claim 1, characterized in that, The multiple elastic walls have integrally injection-molded connecting protrusions on the side opposite to the arc-shaped metal spring sheet, and the multiple connecting protrusions are used to fasten and connect the knob electronic device.

3. The knob cap according to claim 1, characterized in that, The arc-shaped metal spring has an arc shape between full enclosure and semi enclosure, and the shape of the arc-shaped metal spring is adapted to the shape of the part of the knob electronic device located in the socket.

4. The knob cap according to claim 3, characterized in that, The middle portions of both ends of the arc-shaped metal spring are bent toward the elastic wall opposite to them to form clamping portions, and the two clamping portions clamp the elastic wall opposite to them respectively.

5. The knob cap according to claim 4, characterized in that, The arc-shaped metal spring has openings near its two ends, and the openings are adjacent to the clamping part. The openings are used to assist the two ends of the arc-shaped metal spring in bending to form the clamping part.

6. The knob cap according to claim 3, characterized in that, The number of elastic walls is three, and the extension direction of the elastic walls is consistent with the extension direction of the arc-shaped metal sheet. The middle part of the arc-shaped metal sheet surrounds two of the elastic walls, and the two ends of the arc-shaped metal sheet are located in the middle of the remaining elastic wall.

7. The knob cap according to claim 1, characterized in that, The knob cap includes: The outer cap is formed by secondary injection molding of a second plastic material onto the outside of the inner cap, and the Young's modulus of the outer cap is smaller than that of the inner cap.

8. The knob cap according to claim 1, characterized in that, The knob cap includes: A buffer pad is connected to the bottom of the connecting groove and located within the socket position. The buffer pad is used to buffer the movement of the knob electronics within the socket position.

9. A rotary electronic device assembly, characterized in that, The knob electronics assembly includes: Knob electronics, including a rotating shaft; and The knob cap according to any one of claims 1 to 8, wherein the sleeve is detachably sleeved to one end of the rotating shaft.

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