Knob assembly with anti-falling structure and switch

Abstract

The utility model discloses a knob assembly with an anti-drop structure and a switch, and the knob assembly is characterized in that a knob seat is provided with an upper hole, a limiting hole and a lower hole, the limiting hole is connected with the upper hole and the lower hole, and the diameter of the limiting hole is smaller than the diameter of the lower hole and the diameter of the upper hole; the screw penetrates through the upper hole, the limiting hole and the lower hole and is provided with a threaded part, and the diameter of the threaded part is larger than that of the limiting hole; after the screw penetrates through the upper hole, the limiting hole and the lower hole, due to the fact that the diameter of the limiting hole is smaller than that of the threaded part, the limiting hole can limit the screw from falling out, and therefore the anti-falling effect of the screw is achieved, operation is more convenient in the installation process, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electricity, and particularly relates to a knob assembly with an anti-dropping structure and a switch. Background Art

[0002] The switch is specifically an isolating switch or a rotary switch. The switch includes a knob assembly, a switch body and a mounting seat, and the switch body is provided with a rotating shaft seat. The switch body is located inside the cabinet panel, and the mounting seat and the knob assembly are located outside the cabinet panel. The knob assembly is connected to the mounting seat in a matching manner, and a part of the knob assembly passes through the mounting seat and is matched with the rotating shaft seat. Here, the knob assembly and the rotating shaft seat are fixedly connected by screws. Specifically, the connection and fixation are realized by screws passing through the knob seat of the knob assembly, the screw holes of the mounting seat and the rotating shaft seat. When leaving the factory, the whole switch is an integral body. When installation is required, the mounting seat and the knob assembly need to be disassembled and separated. Otherwise, during the installation process, the knob assembly will block the screw holes of the mounting seat, resulting in the screws being unable to pass through. That is, first connect and fix the mounting seat to the cabinet panel, then match the knob seat with the mounting seat, pass the screws through the knob seat, the mounting seat and the rotating shaft seat for connection, and finally match the other parts of the knob assembly with the knob seat.

[0003] However, the problem with this structure is that during the disassembly process, if the operation is improper, the screws are likely to fall off, and due to the limitations of the working environment, the lost screws may not be easily retrieved, seriously affecting the installation and fixation of the entire switch. Content of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is how to prevent the screws from falling off.

[0005] For this purpose, a knob assembly with an anti-dropping structure includes:

[0006] A knob seat, the knob seat is provided with an upper hole, a limiting hole and a lower hole, the limiting hole connects the upper hole and the lower hole, and the diameter of the limiting hole is smaller than the diameter of the lower hole and the diameter of the upper hole;

[0007] A screw, the screw passes through the upper hole, the limiting hole and the lower hole, the screw is provided with a threaded portion, and the diameter of the threaded portion is larger than the diameter of the limiting hole.

[0008] The side wall of the limiting hole includes an inclined surface, the inclined surface inclines downward towards the center of the limiting hole, and the diameter of the smallest part of the limiting hole is smaller than the diameter of the threaded portion.

[0009] The side wall of the limiting hole is provided with a first limiting surface, the first limiting surface is connected to the inclined surface, and the first limiting surface is located on the side facing the lower hole.

[0010] The diameter of the threaded portion is less than or equal to the diameter of the lower hole.

[0011] The knob base is further provided with a positioning cavity which communicates with the lower hole.

[0012] Therefore, the technical problem to be solved by the present utility model is how to prevent the screw from falling off. For this purpose, a switch includes a rotating shaft base and a knob assembly with an anti-dropping structure as described above. The screw passes through the knob base and is connected to the rotating shaft base. The switch is an isolating switch or a rotary switch.

[0013] The technical solution of the present utility model has the following advantages:

[0014] 1. For a knob assembly with an anti-dropping structure provided by the present utility model, when the screw passes through the upper hole, the limiting hole and the lower hole, since the diameter of the limiting hole is less than that of the threaded portion, the limiting hole will restrict the dropping out of the screw at this time, thereby achieving the effect of preventing the screw from falling off, making the operation more convenient during the installation process and improving the assembly efficiency.

[0015] 2. For a knob assembly with an anti-dropping structure provided by the present utility model, through the setting of the inclined surface, a certain guiding effect is formed, so that the resistance is reduced during the screwing process of the screw, and the screw can quickly pass through the limiting hole.

[0016] 3. For a knob assembly with an anti-dropping structure provided by the present utility model, the first limiting surface cooperates with the inclined surface to form a limiting effect to prevent the screw from backing out.

[0017] 4. For a knob assembly with an anti-dropping structure provided by the present utility model, the setting of the positioning cavity better realizes the positioning and fixing effect. The rotating shaft base extends into the positioning cavity, and the screw can be better fastened.

[0018] 5. For a switch provided by the present utility model, for a switch with such a structure, there is no risk of the screw falling off during installation, improving the convenience and efficiency of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a cross-sectional view of a knob assembly with an anti-dropping structure provided by the present utility model;

[0021] Figure 2Cross-sectional view of the knob base provided by the present utility model;

[0022] Figure 3 is Figure 2 Partial enlarged view of part A in;

[0023] Figure 4 Front view of the screw provided by the present utility model;

[0024] Figure 5 Cross-sectional view of another form of the knob base provided by the present utility model;

[0025] Figure 6 is Figure 5 Partial enlarged view of part B in;

[0026] Figure 7 Cross-sectional view of a switch provided by the present utility model;

[0027] Figure 8 Cross-sectional view of another form of a switch provided by the present utility model.

[0028] Explanation of reference numerals:

[0029] 11, knob base; 12, screw; 13, rotating shaft base; 14, mounting base; 111, upper hole; 112, limiting hole; 113, lower hole; 114, positioning cavity; 121, threaded portion; 1121, inclined surface; 1122, first limiting surface. Detailed implementation manners

[0030] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0034] Embodiment 1

[0035] This embodiment provides a knob assembly with an anti-detachment structure. As shown in the attached Figure 1-6 figure, it includes:

[0036] A knob base 11, the knob base 11 is provided with an upper hole 111, a limiting hole 112, and a lower hole 113. The upper hole 111 is located above the limiting hole 112, the lower hole 113 is located below the limiting hole 112, and the limiting hole 112 connects the upper hole 111 and the lower hole 113. That is, the upper hole 111, the lower hole 113, and the limiting hole 112 form a communicating effect. The diameter of the limiting hole 112 is smaller than the diameters of the lower hole 113 and the upper hole 111, forming a structure with larger ends and a smaller middle.

[0037] A screw 12, the screw 12 passes through the upper hole 111, the limiting hole 112, and the lower hole 113. The screw 12 is provided with a threaded portion 121, and the diameter of the threaded portion 121 is larger than the diameter of the limiting hole 112. At this time, a certain force is required for the screw 12 to pass through the limiting hole 112, forming an interference fit, so that the screw 12 can pass through the limiting hole 112. Since the knob base 11 is made of plastic and has a certain deformation ability, the screw 12 can pass through the limiting hole 112, but normal forces (such as gravity or a small pulling force) cannot cause the screw 12 to pass through the limiting hole 112 and become detached. When the screw 12 passes through the upper hole 111, the limiting hole 112, and the lower hole 113, since the diameter of the limiting hole 112 is smaller than the diameter of the threaded portion 121, the limiting hole 112 will restrict the screw 12 from falling out at this time, thereby achieving the effect of preventing the screw 12 from detaching, making the operation more convenient during the installation process and improving the assembly efficiency.

[0038] Specifically, as shown in the attached Figure 2-3 、 Figure 5-6As shown, the side wall of the limiting hole 112 includes an inclined surface 1121. The inclined surface 1121 slopes downward toward the center of the limiting hole 112, forming a gradually narrowing structure. The diameter of the smallest part of the limiting hole 112 is smaller than the diameter of the threaded part 121. That is, the lowermost end of the limiting hole 112 is the smallest part. It should be noted that under the action of strong stamping, the screw 12 can pass through the limiting hole 112 and extend toward the lower hole 113. Through the setting of the inclined surface 1121, a certain guiding effect is formed, reducing the resistance during the screwing process of the screw 12, so that the screw 12 can quickly pass through the limiting hole 112. In addition, it can also be a vertical surface, which is equivalent to hard extrusion, forming an effect of passing through the limiting hole 112.

[0039] Specifically, as shown in the appendix Figure 2-3 , Figure 5-6 As shown, the side wall of the limiting hole 112 is provided with a first limiting surface 1122. The first limiting surface 1122 is connected to the inclined surface 1121 and is located on the side facing the lower hole 113. The first limiting surface 1122 cooperates with the inclined surface 1121 to form a limiting effect to prevent the screw 12 from backing out.

[0040] Specifically, the diameter of the threaded part 121 can be equal to the diameter of the lower hole 113, or the diameter of the threaded part 121 can be smaller than the diameter of the lower hole 113, so that the resistance of the threaded part 121 penetrating into the lower hole 113 is minimized or there is no resistance, facilitating the penetration of the screw.

[0041] Specifically, the knob base 11 is further provided with a positioning cavity 114. The positioning cavity 114 communicates with the lower hole 113. The setting of the positioning cavity 114 better realizes the positioning and fixing effect. The rotating shaft seat extends into the positioning cavity 114, and the screw 12 can be better fastened.

[0042] Embodiment 2

[0043] This embodiment provides a switch. As shown in the appendix Figure 7-8 As shown, it includes:

[0044] A rotating shaft seat 13, a mounting seat 14, and a knob assembly with an anti - detachment structure. The knob assembly with an anti - detachment structure has been described in detail in Embodiment 1, so it will not be elaborated in this embodiment. A part of the rotating shaft seat 13 extends into the positioning cavity 114. The screw 12 passes through the knob base 11, the mounting seat 14 and is connected to the rotating shaft seat 13, that is, the screw 12 passes through the upper hole 111, the limiting hole 112, the lower hole 113, the mounting seat 14 and is connected to the rotating shaft seat 13, forming a fixation between the knob base 11 and the rotating shaft seat 13. Here, the switch is an isolating switch or a rotary switch. For a switch with such a structure, during installation, there is no risk of the screw 12 falling off, improving the convenience and efficiency of installation.

[0045] Obviously, the above embodiments are merely examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the creation of the present utility model.

Claims

1. A knob assembly with an anti - detachment structure, characterized in that, Comprising: A knob base (11), the knob base (11) is provided with an upper hole (111), a limiting hole (112) and a lower hole (113), the limiting hole (112) connects the upper hole (111) and the lower hole (113), and the diameter of the limiting hole (112) is smaller than the diameter of the lower hole (113) and the diameter of the upper hole (111); A screw (12), the screw (12) passes through the upper hole (111), the limiting hole (112) and the lower hole (113), the screw (12) is provided with a threaded portion (121), and the diameter of the threaded portion (121) is larger than the diameter of the limiting hole (112).

2. The knob assembly with an anti - detachment structure according to claim 1, wherein, The side wall of the limiting hole (112) includes an inclined surface (1121), the inclined surface (1121) slopes downward towards the center of the limiting hole (112), and the diameter of the smallest part of the limiting hole (112) is smaller than the diameter of the threaded portion (121).

3. The knob assembly with an anti-detachment structure according to claim 2, wherein, The side wall of the limiting hole (112) is provided with a first limiting surface (1122), the first limiting surface (1122) is connected to the inclined surface (1121), and the first limiting surface (1122) is located on the side facing the lower hole (113).

4. The knob assembly with an anti - detachment structure according to claim 1, characterized in that, The diameter of the threaded portion (121) is smaller than or equal to the diameter of the lower hole (113).

5. The knob assembly with an anti-loosening structure according to claim 1, characterized in that, The knob base (11) is further provided with a positioning cavity (114), and the positioning cavity (114) communicates with the lower hole (113).

6. A switch, characterized in that, Comprising a rotating shaft base (13), a knob assembly with an anti - detachment structure according to any one of claims 1 - 5, the screw (12) passes through the knob base (11) and is connected to the rotating shaft base (13), and the switch is a disconnecting switch or a rotary switch.

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