Screw-free assembly structure of electronic hygrothermograph

Abstract

The utility model discloses a screw-free assembling structure of an electronic hygrothermograph, which is arranged in a shell of the electronic hygrothermograph and comprises a first positioning plate and a second positioning plate, a plurality of first bumps are arranged on the inner walls of the left side and the right side of one end of the shell, a screen is arranged in a shell space on the inner sides of the first bumps, and a plurality of second bumps are arranged on the inner walls of the left side and the right side of the other end of the shell. The left side and the right side of the first positioning plate are each provided with a plurality of protruding parts, assembling openings are formed in the middles of the protruding parts, the first positioning plate is connected with the shell through matching of the assembling openings of the protruding parts and the ends of the first protruding blocks, a matching groove used for being matched with the PCB is formed in the surface of the first positioning plate, and the second positioning plate is arranged on the outer side of the PCB. According to the electronic hygrothermograph, at least one second protruding block is arranged on the wall face, where the first protruding block is located, of the shell, at least one third protruding block is arranged on the shell, screw-free assembling of the screen and the PCB is achieved through clamping connection between the first positioning plate and the second positioning plate and the protruding blocks in the shell, and therefore the assembling efficiency of the electronic hygrothermograph is improved.

Description

Technical Field

[0001] The utility model relates to the field of electronic product assembly structures, in particular to a screw-free assembly structure of an electronic thermometer and hygrometer. Background Art

[0002] With the advancement of technology, the functions of traditional thermometers and hygrometers have been further expanded, resulting in the emergence of some electronic thermometers and hygrometers with timing functions. These electronic thermometers and hygrometers are generally assembled by manual assembly, through which some internal parts such as screens, PCB boards and shells are assembled.

[0003] When the internal parts and the shell of the electronic thermometer and hygrometer are being assembled, it is usually necessary to insert connecting components such as screws and bolts between the two internal parts to achieve the connection and position fixation between the components. Under the premise that manual assembly is still required as the main assembly method for the electronic thermometer and hygrometer, the assembly structure of the electronic thermometer and hygrometer that uses connecting components to fix the parts is still less efficient in the production and assembly of the electronic thermometer and hygrometer. The existing electronic thermometer and hygrometer structure fails to meet the needs of mass production. Utility Model Content

[0004] In view of the above technical deficiencies, the utility model provides a screw-free assembly structure that realizes screw-free assembly of a screen and a PCB board by clamping a first positioning plate and a second positioning plate with a plurality of protrusions in a shell, thereby improving the assembly efficiency of the electronic thermometer and hygrometer.

[0005] In order to achieve the above object, the utility model is implemented through the following technical solutions:

[0006] The utility model discloses a screw-free assembly structure of an electronic thermometer and hygrometer, wherein the screw-free assembly structure is arranged in a shell of the electronic thermometer and hygrometer to fix a screen and a PCB board, and comprises a first positioning plate and a second positioning plate, wherein the inner walls on the left and right sides of one end of the shell are provided with a plurality of first protrusions, the screen is arranged in a shell space inside the first protrusion, the left and right sides of the first positioning plate are provided with a plurality of protrusions, the middle part of the protrusion is provided with an assembly opening, the first positioning plate is connected to the shell through the assembly opening of the protrusion and the cooperation of the end of the first protrusion, the surface of the first positioning plate away from the screen side is provided with a cooperation groove for cooperating with the PCB board, the second positioning plate is arranged on the outer side of the PCB board, the shell wall surface where the first protrusion is located is provided with at least a second protrusion, both ends of the second positioning plate in the length direction are clamped between the first positioning plate and the second protrusion, the shell inner wall perpendicular to the shell wall surface where the second protrusion is located is provided with at least a third protrusion, and one end of the second positioning plate in the width direction is clamped between the third protrusion and the PCB board.

[0007] Furthermore, the protrusion extends in a direction perpendicular to the first positioning plate, and the protrusion is clamped on the left and right sides of the back of the screen.

[0008] Furthermore, the matching groove is formed by a plurality of convex strips arranged on the surface of the first positioning plate in a semi-enclosed form, and the end of the second positioning plate in the length direction is located outside the convex strips.

[0009] Furthermore, the first positioning plate outside the matching groove is provided with at least one first through hole, and the first positioning plate between the two convex strips is provided with at least two second through holes.

[0010] Furthermore, the cross-sectional shape of the end of the second positioning plate in the length direction is stepped and a first rounded corner is provided at the end face, and a clearance groove is provided at the end of the first positioning plate close to the second protrusion, and the clearance groove is located outside the end of the second positioning plate in the length direction.

[0011] Furthermore, the end of the third protrusion close to the center of the shell is provided with a second rounded corner, the surface of one end of the second positioning plate in the width direction is provided with at least a semi-closed first clamping groove, the third protrusion fits into the first clamping groove and presses the second positioning plate, and the wall surface of the second positioning plate close to the opening side of the first clamping groove is provided with a third rounded corner.

[0012] Furthermore, the cross-sectional shape of the third protrusion is L-shaped, and the end of the third protrusion away from the second rounded corner is provided with a second snap-in groove for fixing the end cover of the electronic thermometer and hygrometer, and the edge of the end cover is provided with a convex edge with a cross-sectional shape identical to its edge profile, and the end cover is connected to the back of the shell through the cooperation between the convex edge and the second snap-in groove.

[0013] Furthermore, at least one clamping block is provided on the inner walls around the shell, and a hook-shaped clamping piece is provided on the surface of the end cover close to the convex edge, and the end of the clamping piece is clamped on the surface of the clamping block to achieve a fixed connection between the end cover and the shell.

[0014] Furthermore, at least one convex plate is provided at the other end of the second positioning plate in the width direction.

[0015] The beneficial effects of the utility model are:

[0016] The first positioning plate and the second positioning plate are connected to the shell of the electronic thermometer and hygrometer by snapping with a plurality of protrusions. When the first positioning plate and the second positioning plate are connected to the shell, the first positioning plate and the first protrusion fix the screen in the shell in a semi-enclosed form, and the first positioning plate and the second positioning plate surround and fix the PCB board in the shell, thereby realizing screw-free assembly of the screen and the PCB board, simplifying the assembly process of the electronic thermometer and hygrometer, achieving the purpose of improving the assembly efficiency of the electronic thermometer and hygrometer, and making the structure of the electronic thermometer adapt to the requirements of mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the screw-free assembly structure.

[0018] Figure 2 It is a schematic diagram of the structure of the shell.

[0019] Figure 3 The structure diagram of the first positioning plate Figure 1 .

[0020] Figure 4 The structure diagram of the first positioning plate Figure 2 .

[0021] Figure 5 The structure diagram after the first positioning plate is installed into the housing Figure 1 .

[0022] Figure 6 The structure diagram after the first positioning plate is installed into the housing Figure 2 .

[0023] Figure 7 It is a structural schematic diagram of the PCB board fitting in the fitting groove.

[0024] Figure 8 It is a schematic structural diagram of the second positioning plate.

[0025] Fig. 9 It is a schematic diagram of the structure after the second positioning plate is installed in the shell.

[0026] Fig.10 It is a schematic diagram of the structure of the end cover.

[0027] Fig.11 Illustration of the end cap fitted on the back of the housing Figure 1 .

[0028] Fig.12 Illustration of the end cap fitted on the back of the housing Figure 2 .

[0029] In the figure, 1, first positioning plate; 11, raised portion; 111, assembly port; 12, matching groove; 13, first through hole; 14, second through hole; 15, give way groove; 16, convex strip; 2, second positioning plate; 20, first fillet; 21, first snap-in groove; 22, convex plate; 221, third fillet; 3, shell; 31, first protrusion; 32, second protrusion; 33, third protrusion; 34, snap-in block; 331, second fillet; 332, second snap-in groove; 4, screen; 5, PCB board; 6, end cover; 61, convex edge; 62, snap-in piece. DETAILED DESCRIPTION

[0030] The utility model discloses a screw-free assembly structure of an electronic thermometer and hygrometer, such as Figures 1 to 9 As shown in the figure, the screw-free assembly structure is arranged in the shell 3 of the electronic thermometer and hygrometer to fix the screen 4 and the PCB board 5, including a first positioning plate 1 and a second positioning plate 2, the inner walls of the left and right sides of one end of the shell 3 are provided with a plurality of first protrusions 31, the screen 4 is arranged in the shell 3 space inside the first protrusion 31, the left and right sides of the first positioning plate 1 are provided with a plurality of protrusions 11, the middle part of the protrusion 11 is provided with an assembly port 111, the first positioning plate 1 is realized with the shell through the assembly port 111 of the protrusion 11 and the end of the first protrusion 31. The first positioning plate 1 is connected to the body 3, and the surface of the first positioning plate 1 away from the screen 4 side is provided with a matching groove 12 for matching with the PCB board 5. The second positioning plate 2 is arranged on the outside of the PCB board 5. The wall surface of the shell 3 where the first protrusion 31 is located is provided with at least a second protrusion 32. Both ends of the second positioning plate 2 in the length direction are clamped between the first positioning plate 1 and the second protrusion 32. At least a third protrusion 33 is provided on the inner wall of the shell 3 perpendicular to the wall surface of the shell 3 where the second protrusion 32 is located. One end of the second positioning plate 2 in the width direction is clamped between the third protrusion 33 and the PCB board 5.

[0031] It should be noted that when assembling the electronic thermometer and hygrometer, the screen 4 is first installed into the shell 3 along the edge thereof corresponding to the end of the first protrusion 31, and fixed in the space of the shell 3 inside the first protrusion 31; then, the first positioning plate 1 is installed into the shell 3 along the direction in which the assembly opening 111 on the raised portion 11 cooperates with the end of the first protrusion 31, so as to realize the connection between the first positioning plate 1 and the shell 3, and a semi-enclosed fixing structure composed of the end face of the first positioning plate 1 and the first protrusion 31 is formed on the back of the screen 4, so as to fix the screen 4 in the shell 3; then, the PCB board 5 is installed into the shell 3 along the direction in which it cooperates with the matching groove 12, so that the PCB board 5 cooperates with one side of the first positioning plate 1, and the PCB board 5 is preliminarily fixed; then, the second positioning plate 11 is installed into the shell 3 along the direction in which it cooperates with the matching groove 12, so that the PCB board 5 cooperates with one side of the first positioning plate 1, and the PCB board 5 is preliminarily fixed. The two ends of the plate 2 along the length direction are aligned with the mating direction of the second protrusion 32 and one end of the plate 2 along the width direction is aligned with the mating direction of the third protrusion 33, and the plate 2 is moved into the space of the shell 3 near the second protrusion 32 and the third protrusion 33 in a manner parallel to the surface of the first positioning plate 1. After the two ends of the second positioning plate 2 in the length direction are clamped between the first positioning plate 1 and the second protrusion 32 and one end of the second positioning plate 2 in the width direction is clamped between the third protrusion 33 and the PCB board 5, the second positioning plate 2 is connected to the shell 3, and an enclosing fixing structure composed of the end face of the first positioning plate 1 and the second positioning plate 2 is formed on the outside of the PCB board 5, thereby fixing the PCB board 5 in the shell 3. The entire assembly process does not require the use of screws to fix the components, which is convenient and quick.

[0032] The application of the screw-free assembly structure in the electronic thermometer and hygrometer can realize the screw-free assembly of the screen 4 and the PCB board 5, simplify the assembly process of the electronic thermometer and hygrometer, achieve the purpose of improving the assembly efficiency of the electronic thermometer and hygrometer, and make the structure of the electronic thermometer and hygrometer adapt to the requirements of mass production.

[0033] As a further preference of the above embodiment, Figure 6 As shown, the protrusion 11 extends in a direction perpendicular to the first positioning plate 1 , and the protrusion 11 is clamped on the left and right sides of the back of the screen 4 .

[0034] Among them, after the first positioning plate 1 is connected with the shell 3, the protrusion 11 on the first positioning plate 1 will clamp the left and right sides of the back of the screen 4, so that the first positioning plate 1 is connected to the screen 4, increasing the connection tightness of the internal parts of the electronic thermometer and hygrometer, and further fixing the position of the screen 4 in the electronic thermometer and hygrometer.

[0035] As a further preference of the above embodiment, Figure 4 and Fig. 9 As shown in the figure, the matching groove 12 is formed by a plurality of convex strips 16 arranged on the surface of the first positioning plate 1 in a semi-enclosed form, and the end of the second positioning plate 2 in the length direction is located outside the convex strips 16.

[0036] Among them, the mating groove 12 formed by the convex strip 16 can not only provide a position for the PCB board 5 to be connected to the first positioning plate 1, so that the connection tightness between the PCB board 5 and the first positioning plate 1 is enhanced, and the position of the PCB board 5 in the electronic thermometer and hygrometer can be further fixed, but also the convex strips 16 set at both ends of the length direction of the first positioning plate 1 can limit the second positioning plate 2 when the second positioning plate 2 moves into the space of the shell 3 close to the second protrusion 32 and the third protrusion 33, so that the second positioning plate 2 can move on the specified path, so that the second positioning plate 2 can be accurately clamped in the shell 3.

[0037] Preferably, Figure 4 and Fig. 9 As shown in the figure, the first positioning plate 1 outside the matching groove 12 is provided with at least one first through hole 13, and the first positioning plate 1 between the two convex strips 16 is provided with at least two second through holes 14.

[0038] Among them, the setting of the first through hole 13 and the second through hole 14 provides a position for forming an electrical connection between the PCB board 5 and the screen 4, so that the setting of the first positioning plate 1 does not affect the electrical connection between the two, ensuring that the electronic thermometer and hygrometer can work normally.

[0039] As a further preference of the above embodiment, Figure 4 , Figure 8 and Fig. 9 As shown in the figure, the cross-sectional shape of the end of the second positioning plate 2 in the length direction is stepped and a first rounded corner 20 is provided at the end face, and a clearance groove 15 is provided at the end of the first positioning plate 1 close to the second protrusion 32, and the clearance groove 15 is located on the outside of the end of the second positioning plate 2 in the length direction.

[0040] Among them, the shape of the end portion of the second positioning plate 2 in the length direction can make the end face of the second positioning plate 2 pressed against the surface of the PCB board 5, and at the same time, the end portion of the second positioning plate 2 in the length direction can avoid the structure near the matching groove 12 and be stuck in the space of the shell 3 between the first positioning plate 1 and the second protrusion 32; during the assembly process of the second positioning plate 2, because the end portion of the second positioning plate 2 in the length direction needs to be stuck in the space of the shell 3 between the first positioning plate 1 and the second protrusion 32, the end portion of the second positioning plate 2 in the length direction will be hard squeezed and deformed by the second protrusion 32, so as to enter the first positioning plate 1 The first fillet 20 can play a guiding role when the end of the second positioning plate 2 in the length direction contacts the second protrusion 32, so that the deformation of the end of the second positioning plate 2 in the length direction can be smooth without getting stuck. At the same time, the setting of the yield groove 15 can provide a moving space for the end of the second positioning plate 2 in the length direction when deformation occurs, so that the end of the second positioning plate 2 in the length direction can be bent into it, thereby smoothly entering the space of the shell 3 between the first positioning plate 1 and the second protrusion 32, making it easier for the second positioning plate 2 to be assembled into the shell 3.

[0041] As a further preference of the above embodiment, Figures 7-9 As shown in the combination, the end of the third protrusion 33 close to the center of the shell 3 is provided with a second rounded corner 331, and the surface of one end of the second positioning plate 2 in the width direction is provided with at least a semi-closed first clamping groove 21, and the third protrusion 33 is fitted into the first clamping groove 21 and presses the second positioning plate 2, and the wall surface of the second positioning plate 2 close to the opening side of the first clamping groove 21 is provided with a third rounded corner 211.

[0042] Among them, when one end of the second positioning plate 2 in the width direction moves into the space of the shell 3 close to the third protrusion 33, the second rounded corner 331 and the third rounded corner 211 are set, one end of the second positioning plate 2 in the width direction can be moved more smoothly between the PCB board 5 and the third protrusion 33, and the third protrusion 33 can also smoothly enter the first clamping groove 21 to press the second positioning plate 2, so that the second positioning plate 2 can be easier to assemble into the shell 3.

[0043] Preferably, Figure 2 , Fig. 9 , Fig.10 and Fig.11As shown in the combination, the cross-sectional shape of the third protrusion 33 is L-shaped, and the end of the third protrusion 33 away from the second fillet 331 is provided with a second snap-in groove 332 for fixing the end cover 6 of the electronic thermometer and hygrometer, and the edge of the end cover 6 is provided with a convex edge 61 with a cross-sectional shape identical to its edge profile, and the end cover 6 is connected to the back of the shell 3 through the cooperation between the convex edge 61 and the second snap-in groove 332.

[0044] Since the end cover 6 needs to be installed on the back of the shell 3 of the electronic thermometer and hygrometer to form the entire shell of the electronic thermometer and hygrometer, when the end cover 6 is assembled to the shell 3, the convex edge 61 on the edge of the end cover 6 can be snapped into the second snap-in groove 332 on the third protrusion 33, so that the end cover 6 is connected to the back of the shell 3 to form a complete shell structure.

[0045] Preferably, Figure 2 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown in the combination, at least one clamping block 34 is provided on the inner walls around the shell 3, and a hook-shaped clamping member 62 is provided on the surface of the end cover 6 close to the flange 61, and the end of the clamping member 62 is clamped on the surface of the clamping block 34 to achieve a fixed connection between the end cover 6 and the shell 3.

[0046] During the process of forming a connection between the end cover 6 and the shell 3, the clamping piece 62 on the end cover 6 will be clamped on the surface of the clamping block 34 on the inner wall of the shell 3. Through the clamping of several clamping pieces 62 and the clamping block 34, the end cover 6 and the shell 3 are fixedly connected, so that the electronic thermometer and hygrometer forms a tightly connected shell structure. The end cover 6 does not need to be fixed with screws during assembly, and the operation is also relatively convenient.

[0047] As a further preference of the above embodiment, Figure 8 and Fig. 9 As shown in the figure, at least one convex plate 22 is provided at the other end of the second positioning plate 2 in the width direction.

[0048] Among them, the setting of the protruding plate 22 can provide a position for the finger to form a fulcrum between the second positioning plate 2 when people install the second positioning plate 2 into the shell 3 or remove the second positioning plate 2 from the shell 3, so that people can more easily exert force to install and remove the second positioning plate 2.

[0049] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A screw-free assembly structure of an electronic thermometer and hygrometer, wherein the screw-free assembly structure is arranged in a housing of the electronic thermometer and hygrometer to fix a screen and a PCB board, and is characterized in that: The invention comprises a first positioning plate and a second positioning plate, wherein the inner walls on the left and right sides of one end of the shell are provided with a plurality of first protrusions, the screen is arranged in the shell space inside the first protrusion, the left and right sides of the first positioning plate are provided with a plurality of protrusions, the middle part of the protrusion is provided with an assembly opening, the first positioning plate is connected to the shell through the cooperation of the assembly opening of the protrusion and the end of the first protrusion, the surface of the first positioning plate away from the screen side is provided with a cooperation groove for cooperating with a PCB board, the second positioning plate is arranged on the outside of the PCB board, the shell wall surface where the first protrusion is located is provided with at least a second protrusion, both ends of the second positioning plate in the length direction are clamped between the first positioning plate and the second protrusion, at least a third protrusion is provided on the shell inner wall perpendicular to the shell wall surface where the second protrusion is located, and one end of the second positioning plate in the width direction is clamped between the third protrusion and the PCB board.

2. The screw-free assembly structure according to claim 1, characterized in that: The protrusion extends in a direction perpendicular to the first positioning plate, and the protrusion is clamped on the left and right sides of the back of the screen.

3. The screw-free assembly structure according to claim 1, characterized in that: The matching groove is formed by a plurality of convex strips arranged on the surface of the first positioning plate in a semi-enclosed form, and the end of the second positioning plate in the length direction is located outside the convex strips.

4. The screw-free assembly structure according to claim 3, characterized in that: The first positioning plate outside the matching groove is provided with at least one first through hole, and the first positioning plate between the two convex strips is provided with at least two second through holes.

5. The screw-free assembly structure according to claim 1, characterized in that: The cross-sectional shape of the end of the second positioning plate in the length direction is stepped and a first rounded corner is provided at the end surface. A clearance groove is provided at the end of the first positioning plate close to the second protrusion, and the clearance groove is located outside the end of the second positioning plate in the length direction.

6. The screw-free assembly structure according to claim 1, characterized in that: The end of the third protrusion close to the center of the shell is provided with a second rounded corner, the surface of one end of the second positioning plate in the width direction is provided with at least a semi-closed first clamping groove, the third protrusion is fitted into the first clamping groove and presses the second positioning plate, and the wall surface of the second positioning plate close to the opening side of the first clamping groove is provided with a third rounded corner.

7. The screw-free assembly structure according to claim 6, characterized in that: The cross-sectional shape of the third protrusion is L-shaped, and the end of the third protrusion away from the second fillet is provided with a second snap-in groove for fixing the end cover of the electronic thermometer and hygrometer. The edge of the end cover is provided with a convex edge with a cross-sectional shape identical to its edge profile, and the end cover is connected to the back of the shell through the cooperation between the convex edge and the second snap-in groove.

8. The screw-free assembly structure according to claim 7, characterized in that: At least one clamping block is provided on the inner walls around the shell, and a hook-shaped clamping piece is provided on the surface of the end cover close to the convex edge. The end of the clamping piece is clamped on the surface of the clamping block to achieve a fixed connection between the end cover and the shell.

9. The screw-free assembly structure according to claim 1, characterized in that: At least one convex plate is provided at the other end of the second positioning plate in the width direction.

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