Screw hole mounting structure

Abstract

This invention discloses a screw hole mounting structure, comprising: a hollow inner cavity inside the countersunk lug, with a through hole at the top of the inner cavity; a compression spring installed in the inner cavity; an internally threaded component placed between the compression spring and the bottom of the inner cavity, the internally threaded component having a threaded hole in the middle, and a first baffle wall on the upper end face of the internally threaded component and / or a second baffle wall on the top of the inner cavity; during installation, the base box bracket will not deform due to excessive screw tension, nor will the installation be unstable due to insufficient tension, and no adjustment of speed and force is required when screwing in the screw, it can be screwed in directly, thereby improving installation efficiency.

Description

Technical Field

[0001] This invention relates to screw hole mounting structures, and particularly to a screw hole mounting structure. Background Technology

[0002] Taking the screw holes of current switch and socket back boxes as an example, each back box has a screw hole in a countersunk lug on both the left and right sides. During installation, the screw enters through the mounting hole on the switch and socket bracket and screws into the screw hole of the countersunk lug. As the screw is screwed in deeper, the tension on the countersunk lug and the switch and socket bracket increases. Since the switch and socket bracket is essentially suspended on the countersunk lug of the back box, the bracket bends and deforms, leading to poor fit and loosening between the bracket and the cover. If the screw tension is too low, the switch and socket will not be securely installed. Therefore, the screw tension must be adjusted during installation, which affects installation efficiency. Especially now, with the use of electric screwdrivers, the speed and force of screwing are high, making it easier to cause deformation of the switch and socket, resulting in functional failure and damage to the countersunk lug on the back box. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the aforementioned technical problems in the related art. To this end, the present invention proposes a screw hole mounting structure.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows:

[0005] A screw hole mounting structure according to a first aspect of the present invention includes a countersunk lug, a compression spring, and an internally threaded component, characterized in that:

[0006] The recessed ear has a hollow inner cavity, and the top and bottom of the inner cavity have a top wall and a bottom wall, respectively. The top wall has a through hole.

[0007] The compression spring is installed in the inner cavity with its two ends opposite to the top wall and bottom wall, respectively.

[0008] The internally threaded component is placed between the compression spring and the bottom wall, and a threaded hole is provided in the middle of the internally threaded component.

[0009] Wherein, the upper end face of the internally threaded component is provided with a first baffle and / or the top of the inner cavity is provided with a second baffle;

[0010] During installation, the screw passes sequentially through the through hole and the compression spring to the threaded hole. The screw rotates in the forward screwing direction to connect with the threaded hole until the internal threaded component is pulled up by the screw and rotates relative to the bottom wall in the forward direction; the internal threaded component slips relative to the compression spring and / or the compression spring slips relative to the top wall.

[0011] The screw hole mounting structure according to the embodiments of the present invention has at least the following beneficial effects: during installation, the base box bracket will not be deformed due to excessive screw tension, nor will the installation be unstable due to insufficient tension; and when screwing in the screw, there is no need to adjust the speed and force, and it can be screwed in directly, thereby improving installation efficiency.

[0012] According to some embodiments of the present invention, the upper end face of the internal threaded component is provided with the first baffle, and the upper end of the compression spring is fixed to the top wall or the inner cavity side wall; when disassembling, the screw rotates in the reverse screwing direction, and the lower end of the compression spring abuts against the first baffle. The non-rotating compression spring prevents the internal threaded component from rotating in the reverse direction, so that the screw can be screwed out of the internal threaded component.

[0013] According to some embodiments of the present invention, the top of the inner cavity is provided with a second baffle, and the lower end of the compression spring is fixed to the internal threaded component; when disassembling, the screw rotates in the reverse screwing direction, and the upper end of the compression spring abuts against the second baffle to restrict the reverse rotation of the compression spring. By preventing the internal threaded component from rotating in the reverse direction through the non-rotating compression spring, the screw is screwed out of the internal threaded component.

[0014] According to some embodiments of the present invention, the compression spring is in a compressed state in the inner cavity, and the internally threaded member is tightly attached to the bottom of the inner cavity under the pressure of the compression spring.

[0015] According to some embodiments of the present invention, the lower end face of the internally threaded component is provided with a plurality of grooves, and the bottom wall is provided with a plurality of bosses that cooperate with the grooves on the lower end face of the internally threaded component.

[0016] According to some embodiments of the present invention, the direction of rotation of the compression spring is the same as the direction of rotation of the threaded hole.

[0017] According to some embodiments of the present invention, a pad is provided between the bottom wall and the internally threaded part.

[0018] According to some embodiments of the present invention, the recessed lug includes an upper recessed lug and a lower recessed lug, the inner cavity is disposed inside the lower recessed lug, the upper recessed lug covers the top of the lower recessed lug, and the top wall is the lower end face of the upper recessed lug.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the internal structure of the present invention;

[0022] Figure 2 This is a structural decomposition diagram;

[0023] Figure 3 This is a diagram illustrating the usage status.

[0024] Reference numerals: countersunk lug 100; inner cavity 101; top wall 102; bottom wall 103; through hole 104; second baffle 106; boss 107; upper countersunk lug 110; lower countersunk lug 120; compression spring 200; lower end 201; upper end 202; internal threaded part 300; threaded hole 310; first baffle 320; groove 330; screw 400. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] This invention relates to a screw hole mounting structure, including a countersunk lug 100, a compression spring 200, and an internal threaded component 300.

[0027] like Figure 1 and Figure 2As shown, the recessed lug 100 has a hollow inner cavity 101. In this embodiment, to facilitate the installation of the internally threaded part 300 and the compression spring 200 into the inner cavity 101, the recessed lug 100 is designed as an upper recessed lug 110 and a lower recessed lug 120. The lower recessed lug 120 has an upwardly open cylindrical structure, and the inner cavity 101 is formed inside the lower recessed lug 120. The bottom wall of the inner cavity 101 is at the bottom of the lower recessed lug 120. The periphery of the inner cavity 101 can be closed or partially open. The upper recessed lug 110 covers the top of the lower recessed lug 120 and serves as the top wall 102 of the inner cavity 101. A through hole 104 is provided on the top wall 102, and the upper part of the inner cavity 101 is connected to the outside of the recessed lug 100 through the through hole 104. The combination of the upper recessed lug 110 and the lower recessed lug 120 is not limited, and the lower recessed lug 120 can be integrally formed with the bottom box. The upper countersunk lug 110 can be made of metal and is fixed to the bottom box or lower countersunk lug 120 by means of clips or screws. A compression spring 200 is installed in the inner cavity 101, with its upper end opposite to the through hole 104. An internally threaded component 300 is placed in the inner cavity 101, located between the compression spring 200 and the bottom wall 103. A threaded hole 310 is formed in the middle of the internally threaded component 300, extending vertically through it. The threaded hole 310 is matched with a screw 400; preferably, the cross-sectional shape of the inner cavity 101 and the internally threaded component 300 is circular. The internally threaded component 300 can rotate within the inner cavity 101. In this embodiment, both the compression spring 200 and the threaded hole 310 are right-handed, thus a right-handed screw is used.

[0028] To further illustrate the present invention, the application of the screw hole structure to a switch socket is used as an example, and the first aspect is the installation of the switch socket, and the second aspect is the disassembly of the switch socket.

[0029] The screw hole structure is set on the bottom box of the switch socket, such as... Figure 1 and Figure 3As shown, in the first aspect: when installing the switch socket, after the screw 400 passes through the mounting hole on the switch socket bracket, the screw 400 enters the inner cavity 101 through the through hole 104, and after passing through the center of the compression spring 200, the screw 400 is screwed into the threaded hole 310 of the internal threaded component 300 (this direction is the screw-in direction). In this embodiment, the positive direction is the screw-in direction, which is clockwise; the negative direction is the screw-out direction, which is counterclockwise. During the period from when screw 400 begins to screw in until the internal threaded part 300 is pulled up by screw 400, screw 400 is not subjected to the tension of compression spring 200. Therefore, the friction between screw 400 and the threads of internal threaded part 300 is very small and less than the resistance between internal threaded part 300 and bottom wall 103. Thus, internal threaded part 300 does not rotate or rotates slowly relative to screw 400, allowing screw 400 to be smoothly screwed into threaded hole 310. As screwing in deeper, internal threaded part 300 is pulled up by screw 400, and compression spring 200 is further compressed, generating a greater rebound force. The pressure on internal threaded part 300 and the tension on screw 400 increase. During this process, internal threaded part 300... The resistance between the screw 400 and the bottom wall 103 gradually decreases, eventually reaching zero, while the friction between the screw 400 and the internal threaded component 300 increases. When the friction between the screw 400 and the internal threaded component 300 exceeds the resistance between the internal threaded component 300 and the bottom wall 103 plus the friction between the compression spring 200 and the internal threaded component 300, or when the friction between the screw 400 and the internal threaded component 300 exceeds the resistance between the internal threaded component 300 and the bottom wall 103 plus the friction between the compression spring 200 and the top wall 102, the internal threaded component 300 rotates with the screw, causing the bottom end of the internal threaded component 300 to slip relative to the compression spring 200 and / or the top end of the compression spring 200 to slip relative to the top wall 102. At this point, the internal threaded component 300 stops moving upwards, and the tension exerted by the compression spring 200 on the screw 400 through the internal threaded component 300 becomes constant, no longer increasing. Consequently, the tension exerted by the screw 400 on the switch socket bracket also becomes constant. This constant tension value can be set by selecting an appropriate compression spring 200 and its compression length. This prevents deformation of the base box bracket due to excessive tension on the screw 400, and also prevents insecure installation due to insufficient tension. Furthermore, no adjustment of speed or force is required when screwing in the screw 400; it can be screwed in directly, thereby improving installation efficiency. Specifically:

[0030] According to some embodiments of the present invention, the structure that generates resistance between the internal threaded component 300 and the bottom wall 103 is as follows: Structural scheme one: Figure 1The compression spring 200 is in a compressed state in the inner cavity 101. The elastic force of the compression spring 200 presses the internal thread 300 against the bottom of the inner cavity 101, so that the internal thread 300 fits tightly against the bottom wall 103. As a result, frictional resistance is generated when the thread 300 and the bottom wall 103 rotate relative to each other. The magnitude of this frictional resistance is proportional to the pressure applied by the compression spring 200 to the internal thread 300 and the bottom wall 103. Therefore, a suitable compression spring 200 and the compression length of the compression spring 200 can be selected and set.

[0031] According to some embodiments of the present invention, the structure that generates resistance between the internal threaded component 300 and the bottom wall 103 is as follows: Structural Scheme Two: The lower end face of the internal threaded component 300 is provided with a plurality of grooves 330, and the bottom wall 103 is provided with a plurality of bosses 107 that cooperate with the grooves 330 on the lower end face of the internal threaded component 300. In this way, the grooves 330 and the bosses 107 distributed on different surfaces engage to prevent the internal threaded component 300 from rotating. When the internal threaded component 300 is pulled up by the screw 400, the grooves 330 and the bosses 107 disengage, and the resistance that prevents the internal threaded component 300 from rotating disappears.

[0032] According to some embodiments of the present invention, the structure that generates resistance between the internal threaded part 300 and the bottom wall 103 is, in structural scheme three: the above structural scheme one and the above structural scheme two are combined and used simultaneously.

[0033] In the second aspect: when disassembling the switch socket, rotating the screw 400 in the reverse direction (this direction is the screw 400's unscrewing direction) prevents the compression spring 200 from rotating in the reverse direction. The internal threaded component 300, blocked by the compression spring 200, cannot rotate in the reverse direction with the screw 400. Therefore, the screw 400 can be unscrewed from the internal threaded component 300, thus completing the disassembly of the switch socket from the base box. After the screw 400 disengages from the internal threaded component 300, the compression spring 200 elastically returns to its original state, pressing the internal threaded component 300 back to its original position at the bottom of the inner cavity 101. The top of the inner cavity 101 includes a top wall 102 and a side wall of the inner cavity 101 connecting to the top wall 102. Wherein:

[0034] According to some embodiments of the present invention, the structure in which the compression spring 200 prevents the internal threaded part 300 from rotating in the opposite direction along with the screw 400 is, structural scheme one: as shown in... Figure 1 The top of the inner cavity 101 is provided with a second baffle 106, and the upper end face of the internal threaded part 300 is provided with a first baffle 320. When disassembling, the screw 400 rotates in the reverse direction. The upper end 202 of the compression spring 200 abuts against the second baffle 106, preventing the compression spring 200 from rotating in the reverse direction. The lower end 201 of the compression spring 200 abuts against the first baffle 320. The non-rotating compression spring 200 prevents the internal threaded part 300 from rotating in the reverse direction, so that the screw 400 can be screwed out of the threaded hole 310.

[0035] According to some embodiments of the present invention, the structure in which the compression spring 200 prevents the internal threaded component 300 from rotating in the opposite direction along with the screw 400 is as follows: Structural Scheme Two: The upper end of the compression spring 200 is fixed on the top wall 102 or the side wall of the inner cavity 101, thereby preventing the compression spring 200 from rotating in the opposite direction. The upper end face of the internal threaded component 300 is provided with a first baffle 320. When disassembling, the screw 400 rotates in the opposite direction of unscrewing, and the lower end 201 of the compression spring 200 abuts against the first baffle 320. The non-rotating compression spring 200 prevents the internal threaded component 300 from rotating in the opposite direction, so that the screw 400 can be screwed out of the threaded hole 310.

[0036] According to some embodiments of the present invention, the structure in which the compression spring 200 prevents the internal threaded component 300 from rotating in the opposite direction along with the screw 400 is as follows: Structural Scheme 3: The lower end of the compression spring 200 is fixed to the internal threaded component 300, thereby compressing the spring 200 and preventing it from rotating relative to the internal threaded component 300. A second baffle 106 is provided at the top of the inner cavity 101. When disassembling, the screw 400 rotates in the opposite direction of unscrewing. The upper end 202 of the compression spring 200 abuts against the second baffle 106, preventing the compression spring 200 from rotating in the opposite direction. Thus, the internal threaded component 300 is prevented from rotating in the opposite direction by the non-rotating compression spring 200, so that the screw 400 can be screwed out of the threaded hole 310.

[0037] The direction of rotation of the compression spring 200 is the same as the direction of rotation of the threaded hole 310 and the same as the direction of rotation of the screw 400. This facilitates the following: when the screw 400 rotates in the forward direction, the compression spring 200 slips between itself and the internal threaded part 300 or between itself and the top wall 102; while when the screw 400 rotates in the reverse direction, the lower end 201 of the compression spring 200 abuts against the first stop wall 320 and / or the upper end 202 of the compression spring 200 abuts against the second stop wall 106, preventing the internal threaded part 300 from rotating in the reverse direction.

[0038] In some embodiments of the present invention, the structural forms of the first baffle 320 and the second baffle 106 are not limited, and can be other structural forms with equivalent functions such as bosses, saw teeth, steps, sunken pits or notches. The first baffle 320 prevents the internal threaded part 300 from rotating in the opposite direction relative to the compression spring 200, and the second baffle 106 prevents the compression spring 200 from rotating in the opposite direction relative to the top wall 102.

[0039] A pad (not shown in the figure) can also be placed between the bottom wall 103 and the internal threaded part 300 to raise the internal threaded part 300 and increase the compression length of the compression spring 200 to adjust the compression force of the compression spring 200.

[0040] In the description of this specification, references to terms such as "some specific embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

[0042] In the description of this specification, references to terms such as "some specific embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A screw hole mounting structure, comprising a countersunk lug (100), a compression spring (200), and an internally threaded component (300), characterized in that: The recessed ear (100) has a hollow inner cavity (101) inside. The top and bottom of the inner cavity (101) have a top wall (102) and a bottom wall (103) respectively. The top wall (102) has a through hole (104). The compression spring (200) is installed in the inner cavity (101) with its two ends opposite to the top wall (102) and the bottom wall (103), respectively. The internally threaded component (300) is placed between the compression spring (200) and the bottom wall (103), and the internally threaded component (300) has a threaded hole (310) in the middle. The direction of rotation of the compression spring (200) is the same as the direction of rotation of the threaded hole (310); The upper end face of the internal threaded part (300) is provided with a first baffle (320) and / or the top of the inner cavity (101) is provided with a second baffle (106). During installation, the screw (400) passes sequentially through the through hole (104) and the compression spring (200) to the threaded hole (310). The screw (400) rotates in the forward screwing direction to connect with the threaded hole (310) until the internal threaded part (300) is pulled up by the screw (400) and rotates relative to the bottom wall (103) in the forward direction. The internal threaded part (300) slips relative to the compression spring (200) and / or the compression spring (200) slips relative to the top wall (102). The inner cavity (101) is provided with a second baffle (106) at its top, and the upper end face of the internal threaded component (300) is provided with a first baffle (320). When disassembling, the screw (400) rotates in the reverse direction, and the upper end (202) of the compression spring (200) abuts against the second baffle (106), preventing the compression spring (200) from rotating in the reverse direction; the lower end (201) of the compression spring (200) abuts against the first baffle (320). The non-rotating compression spring (200) prevents the internal threaded component (300) from rotating in the reverse direction, so that the screw 400 can be screwed out of the threaded hole (310). Alternatively, the upper end face of the internally threaded component (300) is provided with the first baffle (320), and the upper end of the compression spring (200) is fixed to the top wall (102) or the side wall of the inner cavity (101). During disassembly, the screw (400) rotates in the reverse direction, and the lower end (201) of the compression spring (200) abuts against the first baffle (320). The non-rotating compression spring (200) prevents the internally threaded component (300) from rotating in the reverse direction, so that the screw (400) can be screwed out of the internally threaded component (300). Alternatively, the top of the inner cavity (101) is provided with the second baffle (106), and the lower end of the compression spring (200) is fixed on the internal threaded part (300). When disassembling, the screw (400) rotates in the reverse direction, and the upper end (202) of the compression spring (200) abuts against the second baffle (106) to restrict the reverse rotation of the compression spring (200). The non-rotating compression spring (200) prevents the internal threaded part (300) from rotating in the reverse direction, so that the screw (400) can be screwed out of the internal threaded part (300).

2. The screw hole mounting structure according to claim 1, characterized in that: The compression spring (200) is in a compressed state in the inner cavity (101), and the internal threaded part (300) is pressed against the bottom of the inner cavity (101) under the pressure of the compression spring (200).

3. The screw hole mounting structure according to claim 1, characterized in that: The lower end face of the internal threaded component (300) is provided with a number of grooves (330), and the bottom wall (103) is provided with a number of bosses (107) that cooperate with the grooves (330) on the lower end face of the internal threaded component (300).

4. The screw hole mounting structure according to claim 1, characterized in that: A pad is provided between the bottom wall (103) and the internal threaded part (300).

5. The screw hole mounting structure according to claim 1, characterized in that: The recessed lug (100) includes an upper recessed lug (110) and a lower recessed lug (120). The inner cavity (101) is located inside the lower recessed lug (120). The upper recessed lug (110) covers the top of the lower recessed lug (120). The top wall (102) is the lower end face of the upper recessed lug (110).

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