CN220821373U - Button fixed subassembly and digital display table - Google Patents

Abstract

The application discloses a key fixing component and a digital display meter, and relates to the technical field of digital display meters, wherein the key fixing component comprises: the device comprises a shell, a mounting plate and keys; the shell is provided with a containing groove, and the top of the containing groove is provided with a first avoiding hole; the mounting plate is at least partially clamped in the accommodating groove, a first clamping part is arranged on the side wall of the accommodating groove, a second clamping part matched with the first clamping part is arranged on the mounting plate, and a waterproof mounting groove is formed in the mounting plate; the key comprises an installation table and a key cap positioned on the installation table, the installation table is inserted into the waterproof installation groove to fix the key, and the key cap extends out of the first avoidance hole. The application can improve the waterproof and dustproof effects of the key and reduce the risk of water inlet damage in the digital display meter.

Description

Button fixed subassembly and digital display table

Technical Field

The application relates to the technical field of digital display meters, in particular to a key fixing assembly and a digital display meter.

Background

In the related art, the digital display meter is widely applied to various industries due to the characteristics of visual sense, convenient and fast setting, high intelligent control degree and the like.

The existing digital display meter is provided with keys on the surface of the mounting plate, and the mounting plate is fixedly connected in the shell in an ultrasonic welding mode so that the keys extend out of the shell and are pressed on the shell, and therefore the waterproof and dustproof effects of the keys are achieved.

But among the prior art, the mounting panel is more complicated at the connected mode in the casing, and connection stability is relatively poor, makes the not inseparable condition of cooperation appear between button and the casing easily, simultaneously, the button setting also has the not inseparable condition of cooperation between button and the mounting panel on the surface of mounting panel, leads to the dustproof and waterproof effect of digital display table lower, causes the digital display table to damage easily.

Disclosure of utility model

The application aims to provide a key fixing assembly and a digital display meter, which can improve the waterproof and dustproof effects of keys and reduce the risk of water inlet damage in the digital display meter.

Embodiments of the present application are implemented as follows:

In one aspect of an embodiment of the present application, there is provided a key fixing assembly including: the device comprises a shell, a mounting plate and keys; the shell is provided with a containing groove, and the top of the containing groove is provided with a first avoiding hole; the mounting plate is at least partially clamped in the accommodating groove, a first clamping part is arranged on the side wall of the accommodating groove, a second clamping part matched with the first clamping part is arranged on the mounting plate, and a waterproof mounting groove is formed in the mounting plate; the key comprises an installation table and a key cap positioned on the installation table, the installation table is inserted into the waterproof installation groove to fix the key, and the key cap extends out of the first avoidance hole.

According to the embodiment of the application, the shell is the mounting plate and the mounting main body of the key on the mounting plate, the accommodating groove is formed in the shell, the mounting plate is positioned in the accommodating groove, the mounting plate is fixed in the accommodating groove through the clamping of the first clamping part and the second clamping part, the clamping fixation mode is high in stability, the situation that the mounting plate loosens or falls off in the accommodating groove is avoided, meanwhile, the size of the mounting plate is matched with the size of the accommodating groove, the side wall of the accommodating groove can also play a limiting role on the mounting plate, the mounting plate can be stably connected in the accommodating groove, the upper surface of the mounting plate is tightly attached to the top of the accommodating groove, so that the mounting plate can stably support the key, the key cap of the key extends out of the first avoidance hole and is tightly attached to the shell and the first avoidance hole, and the waterproof and dustproof effects of the key are improved. And the fixed form of joint still has simple structure, is convenient for make and the characteristics of installation, compares the ultrasonic welding that prior art adopted and can also reduce production process, saves manufacturing cost. In addition, through inserting the mount table in the waterproof mounting groove, the waterproof mounting groove can play fixed action to the mount table, prevents that the problem that becomes flexible or drops from appearing on the mounting panel of button, makes the button stably install on the mounting panel, further improves the button and first hole and the cooperation degree of tightness of mounting panel of dodging, prevents factors such as dust or water and gets into in the casing from the button department because the button installation is unstable, improves the waterproof dustproof effect of button department.

In one example, at least one first annular boss is disposed at the bottom of the mounting table, at least one second annular boss is disposed at the bottom of the waterproof mounting groove, and the first annular boss and the second annular boss are staggered.

According to the embodiment of the application, the first annular boss and the second annular boss are mutually staggered when the mounting table is inserted into the waterproof mounting groove, so that the contact area between the mounting table and the waterproof mounting groove is increased, and liquid is prevented from penetrating from the mounting position of the key and the mounting plate.

In an example, a plurality of key caps are arranged on the mounting table, the key caps are matched with the first annular bosses, at least one partition boss is arranged in the second annular bosses, the partition boss partitions the second annular bosses to form at least two positioning grooves, and the first annular bosses and the positioning grooves are the same in number and in one-to-one correspondence.

Based on the embodiment of the application, the plurality of key caps on the mounting table are in one-to-one correspondence with the first avoidance holes formed in the shell above the mounting table, and the second annular boss is correspondingly arranged in one-to-one correspondence with the first annular boss below the mounting table, and the arrangement mode can provide independent pressing positions and waterproof structures for the single key cap so as to improve the waterproof and dustproof effects of each key at the shell and the mounting plate.

In one example, the waterproof mounting groove is provided with pressing holes, the pressing holes are in one-to-one correspondence with the key caps, and the key caps can be directly or indirectly pressed to the circuit board through the pressing holes.

The waterproof and dustproof effect of the key can be improved on the premise of embodying the key effect by adopting the setting mode, the problem that the key is not tightly matched with the pressing hole due to the integrally formed key is avoided, dust or water is prevented from penetrating into the shell from the avoiding hole and the pressing hole and damaging the circuit board, and the overall safety of the equipment can be improved.

In one example, a plurality of supporting parts are arranged on the mounting plate, a plurality of supporting parts are arranged on one side, away from the keys, of the mounting plate, and one second clamping part is arranged on each supporting part.

According to the embodiment of the application, the supporting part can play a supporting role on the mounting plate, when the mounting plate is clamped into the accommodating groove, the supporting part can be supported on the circuit board to keep the distance between the mounting plate and the circuit board all the time, and meanwhile, the mounting stability of the mounting plate on the shell can be improved together with the clamping fixation of the first clamping part and the second clamping part.

In one example, the first clamping portion includes a first inclined plane and a first clamping surface, the second clamping portion includes a second inclined plane and a second clamping surface, the first inclined plane and the second inclined plane are adapted, and the first inclined plane and the second inclined plane are in sliding fit so that the first clamping surface abuts against the second clamping surface.

The clamping and fixing mode has the characteristics of simple structure, convenient manufacture and convenient assembly.

In one example, a relief groove adapted to the first clamping portion is provided on a peripheral side of the mounting plate.

According to the embodiment of the application, the first clamping part can be completely accommodated and pass through the yielding groove by virtue of the yielding groove, and the yielding groove can accurately avoid the first clamping part during assembly, so that the first clamping part is prevented from contacting the mounting plate and extruding and rubbing with the mounting plate during assembly to cause difficult mounting.

In one example, the housing is provided with a second avoidance hole, and the mounting plate is further provided with a light-transmitting portion, and a part of the light-transmitting portion is located in the second avoidance hole.

The setting of printing opacity portion is convenient for the display light source of mounting panel below pass the mounting panel to the user acquires display information. When the mounting plate is assembled into the accommodating groove, the light-transmitting part is correspondingly inserted into the second avoidance hole and is tightly matched with the second avoidance hole under the matching of the first clamping part and the second clamping part, so that the waterproof and dustproof effects are also achieved.

In one example, a protruding portion is disposed on a side of the mounting plate facing away from the key, the protruding portion corresponds to the waterproof mounting groove, and the waterproof mounting groove portion is disposed on the protruding portion separately.

According to the embodiment of the application, the protruding part can thicken the position on the mounting plate corresponding to the waterproof mounting groove, so that the structural strength of the mounting plate is improved, the problems of fracture or bending and the like caused by the reduction of the structural strength of the mounting plate at the waterproof mounting groove are prevented, meanwhile, the consumed materials for integrally thickening the mounting plate can be saved, and the volume and the manufacturing cost of the mounting plate are reduced.

In another aspect of the embodiment of the present application, there is provided a digital display meter, including a base, a circuit board, and the above-mentioned key fixing assembly, where the base is connected to the key fixing assembly, the circuit board is disposed between the base and the key fixing assembly, and the keys in the key fixing assembly are adapted to the circuit board.

Based on the embodiment of the application, the digital display meter with the key fixing assembly is convenient for the assembly of the digital display meter, and improves the assembly stability of the mounting plate in the digital display meter, thereby improving the waterproof and dustproof effects of the keys of the digital display meter, avoiding the factors such as dust, water and the like from entering the digital display meter from the keys, damaging the circuit board matched with the keys, and improving the safety of the digital display meter.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an exploded structure of a key fixing structure according to an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating an exploded structure of a key fixing structure according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a key fixing assembly according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a key and mounting plate according to an embodiment of the present application;

FIG. 5 is a schematic diagram showing the structure of the mounting portion of the key and the mounting plate according to an embodiment of the present application;

FIG. 6 is a schematic top view of a mounting plate according to an embodiment of the application;

FIG. 7 is a cross-sectional view in the direction A-A of the key of FIG. 6 mounted on a mounting plate in accordance with one embodiment of the present application;

FIG. 8 is an enlarged partial schematic view of the portion A in FIG. 2 according to an embodiment of the present application;

FIG. 9 is an enlarged partial schematic view of the portion B in FIG. 5 according to an embodiment of the present application;

FIG. 10 is a schematic view of the mounting plate and housing prior to assembly in accordance with an embodiment of the present application;

FIG. 11 is a schematic view of the assembled mounting plate and housing according to an embodiment of the application;

fig. 12 is a schematic diagram of an explosion structure of a digital display meter according to an embodiment of the application;

Fig. 13 is a schematic structural diagram of an digital display table according to an embodiment of the application.

Reference numerals illustrate:

1-a housing; 11-a containing groove; 12-a first avoidance hole; 13-a second avoidance hole; 14-a first clamping part; 141-a first bevel; 142-a first clamping face; 143-a first transition plane; 15-indicating a lamp hole; 2-mounting plates; 21-a waterproof mounting groove; 22-a second annular boss; 221-partition boss; 23-pressing the hole; 24-a support; 25-a second clamping part; 251-a second bevel; 252-second clamping face; 253—a second transition plane; 26-a yielding groove; 27-a light-transmitting portion; 28-a projection; 29-an indicator light assembly; 3-keying; 31-a mounting table; 32-a key cap; 33-a first annular boss; 4-a base; 5-circuit board.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, the azimuth or positional relationship indicated by the terms "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that is commonly put in use of the product of this application, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the digital display meter of the related art, the button is installed on the surface of mounting panel, and the mounting panel adopts ultrasonic welding's mode to fix in the casing and support and hold in the internal surface of casing, makes the button stretch out in dodging the hole of seting up on the casing, closely laminates and the button with dodging the laminating in hole through mounting panel and casing to play certain waterproof dustproof effect.

However, as the mounting plate is fixed with the shell in an ultrasonic welding mode, the method has lower connection stability and higher operation difficulty, the mounting plate is easy to loosen or fall off to cause that the mounting plate cannot be attached to the shell, and gaps are easy to be formed between the keys and the shell, so that the waterproof and dustproof effects of the keys of the digital display meter are reduced, and the damage risk of the digital display meter is increased.

In order to solve the above-mentioned technical problems, referring to fig. 1 to 13, the present embodiment provides a key fixing assembly, including: a housing 1, a mounting plate 2 and keys 3; the shell 1 is provided with a containing groove 11, and the top of the containing groove 11 is provided with a first avoiding hole 12; the mounting plate 2 is at least partially clamped in the accommodating groove 11, a first clamping part 14 is arranged on the side wall of the accommodating groove 11, a second clamping part 25 matched with the first clamping part 14 is arranged on the mounting plate 2, and a waterproof mounting groove 21 is formed in the mounting plate 2; the key 3 includes a mounting table 31 and a key cap 32 positioned on the mounting table 31, the mounting table 31 is inserted into the waterproof mounting groove 21 to fix the key 3, and the key cap 32 protrudes out of the first escape hole 12.

According to the embodiment of the application, the shell 1 is the mounting main body of the mounting plate 2 and the key 3 positioned on the mounting plate 2, the accommodating groove 11 is formed in the shell 1, the mounting plate 2 is positioned in the accommodating groove 11, the mounting plate 2 is fixed in the accommodating groove 11 through the clamping of the first clamping part 14 and the second clamping part 25, the clamping and fixing form stability is high, the situation that the mounting plate 2 loosens or falls off in the accommodating groove 11 cannot occur, meanwhile, the size of the mounting plate 2 is matched with the size of the accommodating groove 11, the side wall of the accommodating groove 11 can also play a limiting role on the mounting plate 2, the mounting plate 2 can be stably connected in the accommodating groove 11, the upper surface of the mounting plate 2 is tightly attached to the top of the accommodating groove 11, so that the mounting plate 2 can stably support the key 3, the key cap 32 of the key 3 extends out of the first avoiding hole 12 and is tightly attached to the shell 1 and the first avoiding hole 12, and the waterproof effect at the key 3 is improved. And the fixed form of joint still has simple structure, is convenient for make and the characteristics of installation, compares the ultrasonic welding that prior art adopted and can also reduce production process, saves manufacturing cost. In addition, through inserting mount table 31 in waterproof mounting groove 21, waterproof mounting groove 21 can play fixed action to mount table 31, prevents that button 3 from appearing not hard up or the problem that drops on mounting panel 2, makes button 3 stably install on mounting panel 2, further improves the button 3 and first hole 12 of dodging and mounting panel 2's the tight degree of cooperation, prevents factors such as dust or water because button 3 installation is unstable from in button 3 department gets into casing 1, improves the waterproof dustproof effect of button 3 department.

Specifically, referring to fig. 3, 10 and 11, the first clamping portion 14 is disposed on the side wall of the accommodating groove 11, the second clamping portion 25 is disposed on the side wall of the mounting plate 2 and corresponds to the position of the first clamping portion 14, when the mounting plate 2 and the housing 1 are assembled, the mounting plate 2 is pushed into the accommodating groove 11 along the side wall of the accommodating groove 11, the side wall of the accommodating groove 11 can play a role in limiting and guiding the mounting plate 2, the pushing is stopped after the pushing to the first clamping portion 14 and the second clamping portion 25 is clamped, at this time, the mounting plate 2 is completely clamped in the accommodating groove 11, the upper surface of the mounting plate 2 is attached to the top surface of the accommodating groove 11, the key cap 32 is protruded from the first avoiding hole 12 under the supporting action of the mounting plate 2, and the key cap 32 is fixedly clamped in the accommodating groove 11 through the clamping of the first clamping portion 14 and the second clamping portion 25, so that the key cap 32 of the key 3 is stably inserted in the first avoiding hole 12, the waterproof effect of the key cap 3 can be improved under the cooperation of the waterproof mounting groove 21, and the risk of damaging the waterproof assembly can be reduced.

Referring to fig. 1 to 3, the housing 1 is further provided with an indication lamp hole 15, the indication lamp hole 15 and the first avoiding hole 12 are also located at the top of the accommodating groove 11, the mounting plate 2 is provided with an indication lamp assembly 29, the indication lamp assembly 29 corresponds to the indication lamp hole 15, when the mounting plate 2 is clamped and fixed in the accommodating groove 11, the indication lamp assembly 29 can be stably inserted into the indication lamp hole 15 along with the stable clamping of the mounting plate 2, and gaps are formed between the indication lamp assembly 29 and the indication lamp hole 15 due to unstable installation, so that the waterproof and dustproof effects of the indication lamp assembly 29 are improved.

In some examples of the present application, referring to fig. 4 to 7, the bottom of the mounting table 31 is provided with at least one first annular boss 33, the bottom of the waterproof mounting groove 21 is provided with at least one second annular boss 22, and the first annular boss 33 is staggered with the second annular boss 22.

Based on the above-described embodiment of the present application, the first annular boss 33 and the second annular boss 22 are staggered with each other when the mount table 31 is inserted into the waterproof mount groove 21 to increase the contact area between the mount table 31 and the waterproof mount groove 21, thereby blocking the penetration of liquid from the mounting position of the key 3 and the mount plate 2.

Specifically, the circumference of the first annular boss 33 is smaller than that of the second annular boss 22, the thickness of the first annular boss 33 is the same as that of the second annular boss 22, so that when the mounting table 31 is inserted into the waterproof mounting groove 21, the first annular boss 33 can be completely inserted into a space surrounded by the second annular boss 22, wherein the outer side wall of the first annular boss 33 is attached to the inner side wall of the second annular boss 22, the top surface of the first annular boss 33 abuts against the bottom surface of the waterproof mounting groove 21, the top surface of the second annular boss 22 abuts against the plane where the first annular boss 33 is located, and meanwhile, the outer side wall of the mounting table 31 is attached to the inner side wall of the waterproof mounting groove 21, so that a meshed structure which is mutually staggered and penetrated is formed between the waterproof mounting groove 21 and the mounting table 31, so as to prevent liquid from penetrating between the mounting table 31 and the waterproof mounting groove 21.

In an alternative embodiment, the first annular boss 33 and the second annular boss 22 may be provided in other shapes, such as diamond, circle, triangle, etc., and any shape may achieve the above technical effect in the case that the first annular boss 33 and the second annular boss 22 are tightly fitted.

In some examples of the present application, referring to fig. 4 and 5, a plurality of key caps 32 are provided on the mounting table 31, the key caps 32 are matched with the first annular boss 33, at least one partition boss 221 is provided in the second annular boss 22, the partition boss 221 partitions the second annular boss 22 to form at least two positioning grooves, and the first annular boss 33 has the same number and one-to-one correspondence with the positioning grooves.

According to the embodiment of the application, the plurality of key caps 32 on the mounting table 31 are in one-to-one correspondence with the first avoidance holes 12 formed on the housing 1 above the mounting table 31, and are in one-to-one correspondence with the first annular bosses 33 below the mounting table 31, and correspondingly, the second annular bosses 22 are arranged corresponding to the first annular bosses 33, and the arrangement mode can provide independent pressing positions and waterproof structures for the individual key caps 32 so as to improve the waterproof and dustproof effects of each key 3 at the housing 1 and the mounting plate 2.

Specifically, the first annular boss 33 is disposed on one side of the mounting table 31 facing away from the keycaps 32 and corresponds to the position of the keycaps 32, a gap is provided between two adjacent keycaps 32, and a gap is provided between two corresponding first annular bosses 33, which is the same as the width of the partition boss 221 in the second annular boss 22, so that the partition boss 221 can be completely inserted between the adjacent first annular bosses 33 when the second annular boss 22 is partitioned into a plurality of positioning grooves, so as to improve the matching tightness degree of the first annular boss 33 and the second annular boss 22, thereby further improving the waterproof effect between the mounting table 31 and the waterproof mounting groove 21.

In some examples of the present application, referring to fig. 4, 5 and 12, the waterproof mounting groove 21 is provided with pressing holes 23, the pressing holes 23 are in one-to-one correspondence with the key caps 32, and the key caps 32 can be directly or indirectly pressed to the circuit board 5 through the pressing holes 23.

According to the above embodiment of the present application, the pressing hole 23 is used for communicating the key cap 32 and the circuit board 5, the key cap 32 extends to the outside of the housing 1 for the user to press, and is connected to the circuit board 5 under the key cap 32 through the pressing hole 23 directly or indirectly, so that the key cap 32 directly or indirectly triggers the circuit on the circuit board 5 to be turned on or off after being pressed.

In one embodiment, a pressing member is disposed below the key cap 32, the pressing member is inserted into the pressing hole 23, the circuit board 5 is provided with a trigger portion, and pressing the key cap 32 moves the pressing member in the pressing hole 23 and contacts the trigger portion to realize on and off of a circuit on the circuit board 5. By adopting the arrangement form, the waterproof and dustproof effects of the key 3 can be improved on the premise of embodying the action of the key 3, the problem that the key 3 and the pressing hole 23 are not tightly matched with each other due to the integrally formed key 3 is avoided, dust or water is prevented from penetrating into the shell 1 from the avoiding hole and the pressing hole 23 and damaging the circuit board 5, and the overall safety of equipment can be improved.

In some examples of the present application, fig. 2, 5 and 9, a plurality of supporting portions 24 are provided on the mounting plate 2, the plurality of supporting portions 24 are provided on a side of the mounting plate 2 facing away from the key 3, and one second clamping portion 25 is provided on each supporting portion 24.

According to the embodiment of the application, the supporting portion 24 can support the mounting board 2, when the mounting board 2 is clamped into the accommodating groove 11, the supporting portion 24 can be supported on other structures below the mounting board 2, for example, a circuit board 5 is arranged below the mounting board 2, the supporting portion 24 is supported on the circuit board 5, so that the mounting board 2 can be kept at a distance from the circuit board 5 all the time, and meanwhile, the mounting stability of the mounting board 2 on the housing 1 can be improved together with the clamping fixation of the first clamping portion 14 and the second clamping portion 25.

Specifically, referring to fig. 5, the plurality of support portions 24 is provided at least in two, in this embodiment, four support portions 24 are provided, and the four support portions 24 are provided in pairs on the peripheral side of the mounting plate 2 and distributed symmetrically along the length and width of the mounting plate 2, respectively, so that a stable supporting effect can be exerted on the mounting plate 2. The supporting portion 24 is made of a material with a small amount of elastic deformation capability, so that the second clamping portion 25 disposed on the supporting portion 24 can change relative position when being clamped with the first clamping portion 14, and the first clamping portion 14 and the second clamping portion 25 can be clamped conveniently, so that the mounting plate 2 and the housing 1 can be assembled quickly.

In some examples of the present application, referring to fig. 8 to 11, the first clamping portion 14 includes a first inclined surface 141 and a first clamping surface 142, the second clamping portion 25 includes a second inclined surface 251 and a second clamping surface 252, and the first inclined surface 141 and the second inclined surface 251 are adapted to each other, and the first inclined surface 141 and the second inclined surface 251 are slidably engaged so that the first clamping surface 142 abuts against the second clamping surface 252.

According to the embodiment of the application, in the process of assembling the mounting plate 2 and the housing 1, the mounting plate 2 moves into the accommodating groove 11, the first clamping part 14 and the second clamping part 25 approach each other, then the first inclined plane 141 and the second inclined plane 251 are mutually extruded and relatively slide under the continuous movement of the mounting plate 2 relative to the housing 1, after the first inclined plane 141 is pressed, the position of the first clamping part 14 is fixed or slightly deviates due to the fact that the first clamping part 14 is arranged on the housing 1, after the second inclined plane 251 is pressed, the supporting part 24 where the second clamping part 25 is positioned is elastically deformed, the supporting part 24 bends towards the center of the mounting plate 2, after the first inclined plane 141 and the second inclined plane 251 finish the relative sliding, the supporting part 24 is deformed, at the moment, one surface of the mounting plate 2, which is provided with the waterproof mounting groove 21, is abutted against the top of the accommodating groove 11, and the first clamping surface 142 and the second clamping surface 252 are abutted against, thus the assembly of the mounting plate 2 and the housing 1 is completed.

Specifically, referring to fig. 8 and 9, the connection between the first inclined surface 141 and the first clamping surface 142 is further provided with a first transition plane 143, and the arrangement of the first transition plane 143 can avoid that the first inclined surface 141 and the first clamping surface 142 directly intersect to form a sharper edge, which is inconvenient for assembling the mounting board 2, and is easy to be damaged due to stress concentration, so that the arrangement of the first transition plane 143 can avoid the occurrence of the defects, improve the structural strength of the first clamping portion 14, and enhance the structural stability of the first clamping portion 14. Accordingly, a second transition plane 253 is disposed between the second inclined plane 251 and the second clamping surface 252 of the second clamping portion 25, so that the structure and shape of the second clamping portion 25 are matched with those of the first clamping portion 14, and only different points exist between the position of the first clamping surface 142 opposite to the first inclined plane 141 and the position of the second clamping surface 252 opposite to the second inclined plane 251, so that the first inclined plane 141 and the second inclined plane 251 slide relatively, so that the structure and effect of the second clamping portion 25 will not be repeated herein.

In another embodiment, the structures and shapes of the first clamping portion 14 and the second clamping portion 25 may be other forms, for example, the matching of the circular protrusion and the circular groove, the matching of the boss and the clamping hole may all achieve the same technical effects as the above features, which are not specifically shown in the drawings.

In some examples of the application, referring to fig. 4, 5 and 9, the mounting plate 2 is provided on its peripheral side with a relief groove 26 adapted to the first engagement portion 14.

According to the embodiment of the application, the relief groove 26 is formed on the peripheral side of the mounting plate 2, and is symmetrically distributed along the length and width of the mounting plate 2, the supporting portion 24 is correspondingly arranged at the bottom of the relief groove 26, one surface of the supporting portion 24 provided with the second clamping portion 25 is flush with the bottom of the relief groove 26, the width of the relief groove 26 is the same as the width of the supporting portion 24, and the depth of the relief groove 26 is the same as the height of the first clamping portion 14, so that the first clamping portion 14 can be completely accommodated and pass through the relief groove 26, the relief groove 26 can accurately avoid the first clamping portion 14 during assembly, and the first clamping portion 14 is prevented from contacting the mounting plate 2 and extruding and rubbing with the mounting plate 2 during assembly to cause difficult assembly. In addition, when the mounting plate 2 is assembled to the housing 1, the relief groove 26 can also play a guiding role, so as to align the first clamping portion 14 and the second clamping portion 25, and enable the first clamping portion 14 and the second clamping portion 25 to realize clamping smoothly.

In some examples of the present application, referring to fig. 1 to 4, the housing 1 is provided with a second avoidance hole 13, and the mounting plate 2 is further provided with a light-transmitting portion 27, and a part of the light-transmitting portion 27 is located in the second avoidance hole 13.

Based on the above embodiment of the present application, the second avoidance holes 13 are formed on the top of the accommodating groove 11 like the first avoidance holes 12, and the second avoidance holes 13 are arranged at a position corresponding to the light-transmitting portion 27 on one side of the first avoidance holes 12 at intervals, and the light-transmitting portion 27 is arranged so that the display light source below the mounting plate 2 passes through the mounting plate 2, so that the user can obtain the display information. When the mounting plate 2 is assembled into the accommodating groove 11, the light-transmitting part 27 is correspondingly inserted into the second avoiding hole 13 and is tightly matched with the second avoiding hole 13 under the matching of the first clamping part 14 and the second clamping part 25, so that the waterproof and dustproof effects are also realized. Of course, the mounting plate 2 can be integrally formed by transparent materials, so that the difficulty in manufacturing caused by different materials of all parts of the mounting plate 2 is avoided, and the production and the manufacturing are facilitated.

In another alternative embodiment, the second avoidance hole 13 may be set to be the light-transmitting portion 27, which plays the same role as the light-transmitting portion 27 on the mounting plate 2, and the procedure of opening the second avoidance hole 13 may be omitted, so that the problem that the light-transmitting portion 27 on the mounting plate 2 and the second avoidance hole 13 are not tightly matched due to the machining error of the second avoidance hole 13, resulting in poor waterproof and dustproof effects is avoided.

In some examples of the present application, referring to fig. 5, 7, 10 and 11, a protrusion 28 is provided on a side of the mounting plate 2 facing away from the key 3, the protrusion 28 corresponds to a position of the waterproof mounting groove 21, and the waterproof mounting groove 21 is partially opened to the protrusion 28.

According to the embodiment of the application, the protruding part 28 can thicken the position of the mounting plate 2 corresponding to the waterproof mounting groove 21, so that the structural strength of the mounting plate 2 is improved, the problems of breakage or bending and the like caused by the reduction of the structural strength of the mounting plate 2 at the waterproof mounting groove 21 are prevented, meanwhile, the consumed material for integrally thickening the mounting plate 2 is saved, and the volume and the manufacturing cost of the mounting plate 2 are reduced.

In addition, the setting of bulge 28 can also provide the processing space for the seting up of waterproof mounting groove 21 to increase the volume of waterproof mounting groove 21, can increase the volume of mount table 31, first annular boss 33 and second annular boss 22 correspondingly, thereby increase mount table 31 and waterproof mounting groove 21's area of contact and first annular boss 33 and second annular boss 22's area of contact is favorable to improving the installation stability and the waterproof dustproof effect of button 3 on mounting panel 2.

Referring to fig. 12 and 13, the embodiment of the present application further provides an digital display meter, which includes a base 4, a circuit board 5, and a key fixing assembly in the foregoing embodiment, where the base 4 is connected with the key fixing assembly, the circuit board 5 is disposed between the base 4 and the key fixing assembly, and the key 3 in the key fixing assembly is adapted to the circuit board 5.

Based on the embodiment of the application, the digital display meter with the key fixing assembly is convenient for assembling the digital display meter, and improves the assembling stability of the mounting plate 2 in the digital display meter, thereby improving the waterproof and dustproof effects of the keys 3 of the digital display meter, avoiding the factors such as dust, water and the like from entering the digital display meter from the keys 3, damaging the circuit board 5 matched with the keys 3, and improving the safety of the digital display meter.

Specifically, the casing 1 is fixed with the mounting panel 2 by adopting the form of the clamping connection of the first clamping connection part 14 and the second clamping connection part 25, and during assembly, the mounting panel 2 is only required to be correspondingly inserted into the accommodating groove 11, so that the first clamping connection part 14 and the second clamping connection part 25 can be clamped for assembly, the stability of the clamping connection form is higher, the mounting panel 2 can be always tightly attached to the top of the accommodating groove 11, so that the keys 3 are always tightly matched with avoidance holes, and the waterproof and dustproof effects of the keys 3 of the digital display meter are improved. Meanwhile, the keys 3 are arranged in the waterproof mounting grooves 21, and the first annular bosses 33 and the second annular bosses 22 are arranged in a staggered mode, so that dust, water and other factors can be isolated in the waterproof mounting grooves 21, and the waterproof and dustproof effects of the keys 3 are further improved.

In addition, the supporting part 24 on the mounting plate 2 can be supported on the circuit board 5 below the mounting plate 2, the circuit board 5 is fixedly mounted on the base 4, a certain supporting effect can be achieved on the mounting plate 2, the mounting plate 2 is prevented from being separated from the accommodating groove 11, the assembly stability of the mounting plate 2 and the shell 1 is further improved, correspondingly, the supporting part 24 can also achieve a limiting effect on the circuit board 5, the circuit board 5 is prevented from being separated from the base 4, and the safety of the digital display meter is improved.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A key fixation assembly, comprising: the device comprises a shell, a mounting plate and keys;

the shell is provided with a containing groove, and the top of the containing groove is provided with a first avoiding hole;

The mounting plate is at least partially clamped in the accommodating groove, a first clamping part is arranged on the side wall of the accommodating groove, a second clamping part matched with the first clamping part is arranged on the mounting plate, and a waterproof mounting groove is formed in the mounting plate;

The key comprises an installation table and a key cap positioned on the installation table, the installation table is inserted into the waterproof installation groove to fix the key, and the key cap extends out of the first avoidance hole.

2. The key fixing assembly according to claim 1, wherein at least one first annular boss is provided at the bottom of the mounting table, at least one second annular boss is provided at the bottom of the waterproof mounting groove, and the first annular boss and the second annular boss are staggered.

3. The key fixing assembly according to claim 2, wherein a plurality of key caps are arranged on the mounting table, the key caps are matched with the first annular bosses, at least one partition boss is arranged in the second annular boss, the partition boss partitions the second annular boss to form at least two positioning grooves, and the first annular bosses are identical in number and correspond to the positioning grooves one by one.

4. The key fixing assembly according to claim 3, wherein the waterproof mounting groove is provided with pressing holes, the pressing holes are in one-to-one correspondence with the key caps, and the key caps can be directly or indirectly pressed to the circuit board through the pressing holes.

5. The key fixing assembly according to any one of claims 1 to 4, wherein a plurality of supporting portions are provided on the mounting plate, a plurality of the supporting portions are provided on a side of the mounting plate facing away from the key, and one of the second clamping portions is provided on each of the supporting portions.

6. The key fixation assembly of claim 5, wherein the first clamping portion comprises a first inclined surface and a first clamping surface, the second clamping portion comprises a second inclined surface and a second clamping surface, the first inclined surface and the second inclined surface are adapted, and the first inclined surface and the second inclined surface are slidably matched so that the first clamping surface abuts against the second clamping surface.

7. The key fixing assembly according to claim 1, wherein a relief groove adapted to the first clamping portion is provided on a peripheral side of the mounting plate.

8. The key fixing assembly according to any one of claims 1 to 4, wherein the housing is provided with a second avoidance hole, the mounting plate is further provided with a light-transmitting portion, and a part of the light-transmitting portion is located in the second avoidance hole.

9. The key fixing assembly according to claim 1, wherein a protrusion is provided on a side of the mounting plate facing away from the key, the protrusion corresponds to a position of the waterproof mounting groove, and the waterproof mounting groove is provided separately on the protrusion.

10. The digital display meter is characterized by comprising a base, a circuit board and the key fixing assembly according to any one of claims 1-9, wherein the base is connected with the key fixing assembly, the circuit board is arranged between the base and the key fixing assembly, and keys in the key fixing assembly are matched with the circuit board.