Key structure and measuring tool

Abstract

The utility model provides a key structure and a measuring tool. The key structure comprises a frame body, a key assembly and a protection assembly. And key soft rubber is arranged on the frame body. The key assembly comprises a support and a shell. The shell is arranged at one end of the support, the support is installed on the frame body in a sliding mode, and the support can abut against the key soft rubber. The protection assembly comprises a limiting ring, and the limiting ring is arranged on the frame body. The support is inserted into the limiting ring and is in interference fit with the limiting ring. According to the key structure provided by the utility model, the protection level of the key structure can be effectively changed by controlling the matching relationship between the bracket and the frame body and by controlling whether the limiting ring is additionally arranged or not, so that the key structure can be upwards compatible with a higher protection level and provide protection of various levels. In the process of changing the protection level, other structural parts do not need to be replaced, verification time is short, and follow-up cost is low.

Description

Technical Field

[0001] The utility model relates to the field of measuring tools, and in particular, to a key structure and a measuring tool. Background Art

[0002] In electrical equipment, the protection level represents the Ingress Protection Rating (IP) specified in the international standard, which is used to describe the protection ability of the electrical equipment shell against the intrusion of solid foreign objects (including dust) and water. Due to the customized requirements of product performance differences and the practical reasons of cost control, the existing key structure forms cannot meet the application requirements of two-level or above IP protection levels.

[0003] In the related art, after the key structure is produced and processed, the structure cannot be adjusted anymore. The structure combination method is only applicable to a single-level IP protection, with relatively high subsequent costs and also requiring verification time, and does not have the ability to freely switch the application of protection levels. Summary of the Utility Model

[0004] In order to overcome the defects existing in the related art, the utility model provides a key structure and a measuring tool.

[0005] The embodiments of the utility model are implemented as follows:

[0006] A key structure includes a frame body, a key assembly and a protection assembly. A key soft rubber is arranged on the frame body. The key assembly includes a bracket and a housing; the housing is arranged at one end of the bracket, the bracket is slidably installed on the frame body, and the bracket can abut against the key soft rubber. The protection assembly includes a limit ring, and the limit ring is arranged on the frame body. The bracket is inserted into the limit ring, and the bracket and the limit ring are in interference fit.

[0007] In some embodiments, exemplarily, a through groove is formed on the frame body, and the bracket is slidably inserted into the through groove.

[0008] In some embodiments, exemplarily, the bracket and the through groove are set to have a clearance fit. The clearance between the bracket and the through groove is set to L, satisfying: L≤0.07mm.

[0009] In some embodiments, exemplarily, a limit groove is formed on the side wall of the through groove, and the limit ring is clamped in the limit groove.

[0010] In some embodiments, exemplarily, the limit groove is arranged at one end of the through groove close to the key soft rubber, and the limit groove is communicated with the outside of the frame body.

[0011] In some embodiments, exemplarily, a relief groove is formed on a surface of the housing facing the bracket, and a front housing extends from a surface of the through groove facing the housing, and the front housing extends into the relief groove.

[0012] In some embodiments, exemplarily, the housing includes an extension plate disposed at an edge of a surface of the housing away from the bracket, and the extension plate extends horizontally away from the frame.

[0013] In some embodiments, exemplarily, a mating groove is further formed on the frame, the mating groove is disposed outside the through groove and surrounds the through groove, and the extension plate can abut against the mating groove.

[0014] In some embodiments, exemplarily, the limiting ring is an O-ring made of an elastic material. The surface roughness of a side surface of the bracket facing the O-ring is set to 0.2 μm.

[0015] In some embodiments, exemplarily, the bracket is cylindrical, and the diameter of one end of the bracket close to the key soft rubber is the same as the diameter of the other end of the bracket away from the key soft rubber.

[0016] A measuring tool includes a measuring component and the key structure in any one of the above embodiments, and the key structure is electrically connected to the measuring component. A plurality of key components are evenly arranged on the frame.

[0017] The beneficial effects of the embodiments of the present invention are as follows:

[0018] For the key structure provided by the present invention, the clearance fit between the bracket and the frame in the key component serves as a layer of protection, and the cooperation between the bracket and the limiting ring constitutes another layer of protection. The multi-layer protection cooperation avoids a large amount of residual conventional and moderately corrosive liquids at the key soft rubber, and also prevents external dust from penetrating into the frame and affecting the key soft rubber.

[0019] For the key structure provided by the present invention, by controlling the cooperation relationship between the bracket and the frame and whether to install a limiting ring, the protection level of the key structure of the present invention can be effectively changed, enabling the present invention to be upward compatible with higher protection levels and providing multiple levels of protection. During the process of changing the protection level, there is no need to replace other structural parts, the verification time is short, and the subsequent cost is low. Description of the Drawings

[0020] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following accompanying drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related accompanying drawings can also be obtained based on these drawings.

[0021] Figure 1 Schematic structural diagram of one perspective of the key structure of the embodiment of the present utility model;

[0022] Figure 2 of the key structure of the embodiment of the present utility model Figure 1 Partial enlarged view of the A position in.

[0023] Icon:

[0024] 100 - frame; 110 - key soft rubber; 120 - through groove; 121 - front shell; 130 - limiting groove; 140 - fitting groove; 200 - key assembly; 210 - bracket; 220 - housing; 221 - extension plate; 222 - relief groove; 310 - limiting ring. Detailed implementation manners

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0027] It should be noted that similar reference numerals and letters indicate similar items in the following accompanying drawings. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in the subsequent accompanying drawings.

[0028] 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", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It 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 thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical", etc. do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0030] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. 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 situations.

[0031] The present application provides a key structure to solve the problem in the related art that the protection level of the key structure cannot be changed and cannot adapt to multiple levels of IP protection.

[0032] In electrical equipment, it is usually necessary to protect the core components to prevent them from contacting dust or liquid, which may affect the normal operation of the core components. Among them, the protection level has a clear definition. The protection level represents the international standard of the enclosure protection level IP (Ingress Protection Rating), which is used to describe the protection ability of the electrical equipment enclosure against the intrusion of solid foreign objects (including dust) and water.

[0033] Please refer to Figure 1 、 Figure 2, A key structure, comprising a frame body 100, a key assembly 200 and a protection assembly. A key soft rubber 110 is provided on the frame body 100. The key assembly 200 includes a bracket 210 and a housing 220; the housing 220 is disposed at one end of the bracket 210, the bracket 210 is slidably mounted on the frame body 100, and the bracket 210 can abut against the key soft rubber 110. The protection assembly includes a limiting ring 310, and the limiting ring 310 is provided on the frame body 100. The bracket 210 is inserted into the limiting ring 310, and the bracket 210 and the limiting ring 310 are in interference fit.

[0034] Specifically, when the key structure of this embodiment is in use, the housing 220 in the key assembly 200 can initially protect the bracket 210 and the structure in the frame body 100 located below the housing 220. The sliding installation method of the bracket 210 in the key assembly 200 with the frame body 100 is a further protection for the structure in the frame body 100 located below the bracket 210. In addition, the bracket 210 and the limiting ring 310 are in interference fit. Through the limiting ring 310, the structure in the frame body 100 located below the limiting ring 310 is protected, ensuring the safety of the core structure below the limiting ring 310, that is, the key soft rubber 110, and preventing external dust from contacting it. In particular, the limiting ring 310 can also prevent conventional and medium to mild corrosive liquids from contacting the key soft rubber 110, ensuring the protection level of the key structure of this embodiment.

[0035] In this embodiment, the limiting ring 310 is not fixed. Specifically, in devices with relatively low protection level requirements, there is no need to set the limiting ring 310. Relying on the protection of the housing 220 and the protection between the bracket 210 and the frame body 100 can meet the protection level requirements for the key soft rubber 110. When the protection level requirements are relatively high, the limiting ring 310 is assembled into the frame body 100, and the improvement of the protection level can be completed. The operation is simple and the cost is low.

[0036] In some embodiments, by way of example, as Figure 2 shown, a through groove 120 is formed on the frame body 100, and the bracket 210 is slidably inserted into the through groove 120. Through the sliding fit between the bracket 210 and the through groove 120, the stability of the bracket 210 is initially ensured, and it is avoided that the bracket 210 shakes due to gravity or other external forces in the static state, affecting the normal use of this embodiment. In addition, a through groove 120 is formed on the frame body 100, and the gap between the through groove 120 and the bracket 210 is shielded by the housing 220 in the key assembly 200 above the through groove 120, ensuring that this embodiment can meet the protection level of IP54 and preventing external dust from passing through the through groove 120 and contacting the key soft rubber 110.

[0037] In the international standard of the degree of protection provided by enclosures, for the IP54 protection level, the first digit represents the protection level against solid foreign objects (including dust), and the second digit represents the protection level against liquids. For IP54, it means that it can completely prevent dust from entering and can prevent water splashing from any direction, but it cannot completely prevent water from invading. The housing 220 initially blocks dust, and the cooperation between the through groove 120 and the bracket 210 further blocks dust, ensuring that the dust in this embodiment cannot contact the key soft rubber 110. After liquid splashing from any direction onto this embodiment, it can be blocked by the housing 220, but it can still seep in along the gap between the through groove 120 and the bracket 210.

[0038] In some embodiments, by way of example, as Figure 2 shown, the bracket 210 and the through groove 120 are set to be in clearance fit. The clearance between the bracket 210 and the through groove 120 is set to L, satisfying: L ≤ 0.07 mm. Limiting the clearance between the bracket 210 and the through groove 120 so that the maximum clearance can only be 0.07 mm, thereby ensuring that this embodiment meets the requirements of the IP54 protection level without affecting the normal sliding of the bracket 210.

[0039] In some embodiments, by way of example, as Figure 2 shown, a limiting groove 130 is formed on the side wall of the through groove 120, and the limiting ring 310 is snap-fitted into the limiting groove 130. The limiting ring 310 is arranged in the limiting groove 130, making it convenient for the installation of the limiting ring 310. The installation position of the limiting ring 310 is positioned by the limiting groove 130, reducing the installation difficulty of the limiting ring 310 and making this embodiment more convenient for assembly. Moreover, the limiting ring 310 is arranged in the limiting groove 130, and the limiting groove 130 can also limit the limiting ring 310, preventing the posture of the limiting ring 310 from being distorted or deforming during use, which may affect the protection effect of this embodiment.

[0040] In some embodiments, by way of example, as Figure 2As shown, the limiting groove 130 is provided at one end of the through groove 120 close to the key soft rubber 110, and the limiting groove 130 communicates with the outside of the frame body 100. In this way, the installation difficulty of the limiting ring 310 can be further reduced. Specifically, when the limiting ring 310 needs to be installed, the structure where the key soft rubber 110 is located is separated from the frame body 100, so that the limiting groove 130 is exposed to the outside. Then, the constructor can directly install the limiting ring 310 to the designated position in the limiting groove 130 and fix it. After the fixation is completed, the frame body 100 and the structure where the key soft rubber 110 is located are reassembled. Correspondingly, when the limiting ring 310 is loaded and needs to be removed, similar to the above operation, after separating the frame body 100 and the structure where the key soft rubber 110 is located, the removal operation of the limiting ring 310 can be carried out, making the adjustment process of the protection level of this embodiment simpler and more convenient.

[0041] In some embodiments, by way of example, as Figure 2 shown, the limiting ring 310 is set as an O-ring, and the O-ring is made of an elastic material. The surface roughness of the side surface of the bracket 210 facing the O-ring is set to 0.2 μm. Setting the limiting ring 310 as an O-ring ensures reliable cooperation between the bracket 210 and the limiting ring 310 and prevents the posture of the bracket 210 from changing during the sliding process. At the same time, the surface roughness of the bracket 210 is limited, and the surface roughness is set to 0.2 μm, which is close to a smooth surface, ensuring that the bracket 210 can slide normally within the O-ring. Moreover, the interference fit assembly method enables the O-ring to limit the bracket 210 and play a damping role, so that the bracket 210 remains absolutely stationary in the static state when no external force is applied, improving the reliability of this embodiment.

[0042] It should be particularly noted that in this embodiment, through the interference fit between the O-ring and the bracket 210 and the limitation of the surface roughness of the bracket 210, this embodiment can reach the protection level of IP65, that is, completely prevent dust from entering and can prevent low-pressure water jets from any direction, but cannot completely prevent water intrusion. Or reach the protection level of IP67, that is, completely prevent dust from entering, be resistant to short-term immersion in water, and can be immersed in water for a short time under defined conditions. This further improves the protection ability of this embodiment and enables this embodiment to adaptively adjust the protection level by installing or removing the limiting ring 310.

[0043] Specifically, when the button structure needs to be used in an application scenario with a lower protection level, such as an IP54 protection level scenario that can meet the usage requirements, there is no need to assemble the limit ring 310 in the button structure. If, after assembly, a higher protection level usage scenario needs to be met, the limit ring 310 can be directly loaded into the limit groove 130, enabling the button structure of this embodiment to meet the usage scenarios with IP65 or IP67 protection levels, and being upward compatible with higher protection levels. When adjusting the protection level, there is no need to verify the time, and it will not incur high costs, making it more practical and widely applicable.

[0044] In some embodiments, by way of example, such as Figure 1 、 Figure 2 shown, a relief groove 222 is formed on one side of the housing 220 facing the bracket 210, and a front shell 121 extends from one side of the through groove 120 facing the housing 220. The front shell 121 extends into the relief groove 222. Through the cooperation of the relief groove 222 and the front shell 121, a U-shaped turning passage is provided between the outside and the through groove 120 on the frame body 100, further improving the dust protection ability of the housing 220. Through the U-shaped loop and the clearance fit between the through groove 120 and the bracket 210, the protection level of this embodiment is ensured.

[0045] It can be understood that through the cooperation of the relief groove 222 and the front shell 121, the liquid splashed from multiple directions outside can be effectively isolated, while improving the dust protection ability and liquid protection ability of this embodiment, ensuring that this embodiment can reach the target level.

[0046] In some embodiments, by way of example, such as Figure 1 、 Figure 2 shown, the housing 220 includes an extension plate 221. The extension plate 221 is arranged at the edge of the side of the housing 220 away from the bracket 210, and the extension plate 221 extends horizontally away from the frame body 100. By providing the extension plate 221 on the housing 220, the extension plate 221 is made to cooperate with the U-shaped loop formed by the relief groove 222 and the front shell 121, improving the dust and liquid protection ability of the housing 220. In addition, a flat plate is provided on the surface of the frame body 100, and the extension plate 221 is arranged between the flat plate and the frame body 100. In this way, the movement range of the housing 220 can be restricted, preventing the movement range of the housing 220 and the bracket 210 from exceeding the preset range and improving the reliability of this embodiment. It can also, through the cooperation of the flat plate and the extension plate 221, provide a layer of protection outside the U-shaped loop, forming a multi-stage U-shaped protection, extending the path between the outside and the through groove 120, and further improving the protection ability of this embodiment.

[0047] In some embodiments, by way of example, such as Figure 1 、 Figure 2As shown, the frame 100 is further provided with a matching groove 140, which is arranged outside the through groove 120 and surrounds the through groove 120, and the extension plate 221 can abut against the matching groove 140. The matching groove 140 matches with the flat plate, and the flat plate limits the moving distance of one end of the housing 220 in the vertical direction, and the matching groove 140 limits the moving distance of the other end of the housing 220 in the vertical direction, so that the extension plate 221 can only move between the flat plate and the matching groove 140, and the extension plate 221 is controlled, that is, the moving distance and moving trajectory of the housing 220 are controlled, thereby improving the rationality of the structure of this embodiment.

[0048] It should be noted that the distance between the matching groove 140 and the flat plate is smaller than the distance between the front shell 121 and the bottom of the clearance groove 222. In this way, it can be ensured that the shell 220 will not be interfered by the front shell 121 when moving in the vertical direction, ensuring that the operation of this embodiment is reliable and stable.

[0049] In some embodiments, for example, Figure 2 As shown, the bracket 210 is set to be cylindrical, and the diameter of the end of the bracket 210 close to the key soft glue 110 is the same as the diameter of the end of the bracket 210 away from the key soft glue 110. It is ensured that when the bracket 210 slides in the through groove 120 and the limiting ring 310, there will be no interference with the through groove 120 or the limiting ring 310 due to the change in the diameter of the bracket 210, thereby ensuring the reliability and stability of the sliding of the bracket 210.

[0050] In some embodiments, the protective structure for the soft key glue 110 includes: the flat plate and the extension plate 221 cooperate to block dust and liquid; the U-shaped loop formed by the flat plate, the matching groove 140 and the extension plate 221; the U-shaped loop formed by the clearance groove 222 and the front shell 121; the clearance fit between the through groove 120 and the bracket 210; the interference fit between the bracket 210 and the limiting ring 310. The above-mentioned multiple structures cooperate with each other to ensure that this embodiment can meet the protection requirements of protection level IP65 and protection level IP67 after normal assembly, and ensure the reliability of the protection capability of this embodiment.

[0051] The present application also provides a measuring tool, comprising a measuring component and a key structure in any one of the above embodiments, wherein the key structure is electrically connected to the measuring component. A plurality of key components 200 are evenly arranged on the frame 100 .

[0052] The measuring tool provided in this embodiment includes the key structure described in any one of the above embodiments, and also has all the beneficial effects of the above key structure, which will not be described in detail here.

[0053] The measuring tools in this embodiment include, but are not limited to, pointer-type measuring tools, digital display-type measuring tools, etc. As long as they include a measuring component and can measure a certain type of data. When in use, the target data is measured through the measuring component, and through the key structure of this embodiment, this embodiment can be applied to different scenarios and working conditions, and can ensure the measurement effect in different working environments, improving the practicability of this embodiment.

[0054] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A key structure, characterized in that, Comprising: A frame body (100) with a key soft rubber (110) provided thereon; A key component (200) including a bracket (210) and a housing (220); the housing (220) is disposed at one end of the bracket (210), the bracket (210) is slidably mounted on the frame body (100), and the bracket (210) can abut against the key soft rubber (110); A protection component including a limit ring (310) disposed on the frame body (100); The bracket (210) is inserted into the limit ring (310), and the bracket (210) and the limit ring (310) are in interference fit.

2. The key structure according to claim 1, wherein A through groove (120) is formed on the frame body (100), and the bracket (210) is slidably inserted into the through groove (120).

3. The key structure according to claim 2, wherein The bracket (210) and the through groove (120) are set to have a clearance fit; The clearance between the bracket (210) and the through groove (120) is set to L, satisfying: L ≤ 0.07 mm.

4. The key structure according to claim 2, characterized in that, A limit groove (130) is formed on the side wall of the through groove (120), and the limit ring (310) is snap-fitted into the limit groove (130).

5. The key structure according to claim 4, characterized in that, The limit groove (130) is disposed at one end of the through groove (120) close to the key soft rubber (110), and the limit groove (130) communicates with the outside of the frame body (100).

6. The key structure according to claim 2, wherein, A relief groove (222) is formed on the surface of the housing (220) facing the bracket (210), and a front shell (121) extends from the surface of the through groove (120) facing the housing (220) and extends into the relief groove (222).

7. The key structure according to claim 6, wherein The housing (220) includes an extension plate (221) disposed at the edge of the surface of the housing (220) away from the bracket (210), and the extension plate (221) extends horizontally away from the frame body (100).

8. The key structure according to claim 7, wherein, A mating groove (140) is further formed on the frame body (100), the mating groove (140) is disposed outside the through groove (120) and surrounds the through groove (120), and the extension plate (221) can abut in the mating groove (140).

9. The key structure according to claim 1, wherein The limit ring (310) is set as an O-ring made of an elastic material; The surface roughness of the side surface of the bracket (210) facing the O-ring is set to 0.2 μm.

10. A measuring tool, characterized in that, Including a measurement component and the key structure according to any one of claims 1 to 9 above, the key structure is electrically connected to the measurement component; A plurality of the key components (200) are evenly distributed on the frame body (100).

Images