Reliable side pressing key structure

Abstract

The utility model relates to a reliable side pressing key structure, which solves the problems of low reliability, complex structure and high cost of the conventional side pressing key. Comprising a shell, a circuit board is arranged in the shell, keys are arranged on the circuit board, a button used for pressing the keys is arranged on the shell, the keys are arranged on the front face of the circuit board, the button is arranged corresponding to the side face of the circuit board, the keys are connected with the button through a side pressing lever, and a reset elastic piece used for driving the button to reset is arranged in the shell. During use, the button on the shell is pressed, the inclined plane on the button presses the swing end of the side pressing lever to rotate towards the key, and the side pressing lever pressing block presses the key along with the rotation of the side pressing lever; when the button is released, the button is reset under the action of the reset elastic piece, and the side pressing lever is also reset under the reset of the key, so that the effect that the stroke change of side pressing of the side pressing button is reliably converted into pressure triggering on the front key is realized, and the key is good in reliability and not easy to damage; the structure is simple and the cost is low.

Description

Technical Field

[0001] The utility model relates to a digital display measuring tool, in particular to a reliable side pressing button structure. Background Art

[0002] In the industrial age where technology is changing with each passing day, handheld electronic products are very common in life. In order to better reflect the function or better meet the human-machine operation, many products often design the buttons on the side. This situation results in the touch switch inside no longer lying on the circuit board, but standing on the circuit board at 90 degrees, and these buttons are generally designed on the edge of the circuit board for structural design. When the touch switch standing on the circuit board at 90 degrees is pressed, its force direction is not like the front button lying on the lead board, which is perpendicular to the circuit board, but parallel to the circuit board. This results in the durability and reliability of the touch switch standing at 90 degrees being much worse than the original touch switch lying on the circuit board. The reliability of this kind of touch switch standing on the circuit board at 90 degrees is directly related to the size of the soldering pad of the soldering touch switch and the soldering reliability. Each time the side pressure is applied, the force is finally applied to the pad. This causes the pad of the touch switch and the copper cladding on the circuit board to be subjected to lateral thrust every time. Over time, they are prone to loosening and falling off. Therefore, the reliability of the touch switch standing at 90 degrees on the circuit board is worse than that of the touch switch lying on the circuit board with its front side facing the circuit. Problems are prone to occur with side buttons during mass production.

[0003] For the above problems, the common practices in the industry are: if the internal space of the product allows, make a small circuit board and solder a flat button on it, insert the whole small circuit board vertically into the shell for assembly, and then connect the two circuit boards with wires. In this way, the side buttons made by the small circuit are reliable, but the cost, production process and assembly time are greatly increased; another method is to add two fixing columns to the upright buttons, open holes on the circuit board, and increase the soldering pad. This method is more convenient and the cost is not high, but the side buttons have requirements on the strength and number of times the buttons are pressed. At the same time, if the product needs to be waterproof, this structure cannot open fixing holes for the circuit board; there are also some processes such as adding some fixing glue on the above basis, but the production efficiency and labor costs are greatly affected. Utility Model Content

[0004] The utility model aims to solve the problems of low reliability, complex structure and high cost of the existing side pressure buttons.

[0005] The technical solution adopted to solve the technical problems raised by the utility model is as follows: the reliable side-pressing key structure of the utility model includes a shell, a circuit board is arranged in the shell, and a key is arranged on the circuit board, the shell is provided with a button for pressing the key, the key is arranged on the front side of the circuit board, and the button is arranged corresponding to the side of the circuit board, the key is connected to the button through a side pressure lever, and a side pressure lever pressing block is arranged on the side pressure lever corresponding to the top of the key, one end of the side pressure lever is rotatably connected to the shell through a first rotating shaft, and the other end of the side pressure lever swings back and forth in the direction of the key, one end of the button is rotatably connected to the shell through a second rotating shaft, and the other end of the button is movably connected to the swinging end of the side pressure rod lever, the button is provided with an inclined surface for pressing the swinging end of the side pressure rod lever to rotate in the direction of the key, and a reset elastic member for driving the button to reset is provided in the shell.

[0006] The technical solutions further defining the utility model include:

[0007] The circuit board is provided with a key sealing cover for sealing the key on the circuit board, the key sealing cover covers the key, and the shell is provided with a crimping rib for pressing and sealing the key sealing cover and the circuit board.

[0008] A key sealing cover pressing block is arranged on the key sealing cover corresponding to the side pressure lever pressing block.

[0009] The resetting elastic member is a resetting spring.

[0010] The shell is provided with a U-shaped groove matching with the first rotating shaft, the first rotating shaft is placed in the U-shaped groove, the shell is provided with a pressure plate for positioning the first rotating shaft in the U-shaped groove, the pressure plate is arranged on the opening of the U-shaped groove, and the pressure plate is fixedly connected to the shell.

[0011] The cross section of the side pressure lever pressing block is U-shaped.

[0012] The contact surface between the swing end of the side pressure rod and the inclined surface is an arc surface.

[0013] The contact surface between the swing end of the side pressure rod and the inclined surface and the inclined surface are both wear-resistant surfaces.

[0014] Through the above technical scheme, the beneficial effects of the utility model are as follows: when the reliable side-pressing button structure of the utility model is used, the button on the shell is pressed, and the inclined surface on the button presses the swinging end of the side pressure rod lever to rotate in the direction of the button, and the side pressure lever pressure block presses the button as the side pressure lever rotates; when the button is released, the button is reset under the action of the reset elastic member, and the side pressure lever is also reset under the reset of the button, thereby realizing the reliable conversion of the stroke change of the side pressure button into the effect of pressure triggering on the front button, the button has good reliability, is not easy to be damaged, and has a long service life; at the same time, the structure is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a three-dimensional structural schematic diagram of a reliable side-pressing button structure.

[0016] Figure 2 The utility model is a cross-sectional structural schematic diagram of a reliable side-pressing key structure.

[0017] Figure 3 The utility model is a cross-sectional structural schematic diagram of a reliable side-pressing key structure.

[0018] Figure 4 The utility model is a schematic diagram of the installation structure of a pressure plate with a reliable side-pressing key structure.

[0019] Figure 5 The utility model is a schematic diagram of a three-dimensional structure of a button of a reliable side-pressing key structure. DETAILED DESCRIPTION

[0020] The structure of the utility model is further described below in conjunction with the accompanying drawings.

[0021] Reference Figures 1 to 5 This structure uses a waterproof digital caliper with wireless data transmission as an example, but the application of this structure is not limited to digital measuring tools. Because the waterproof digital caliper with wireless data transmission is a handheld tool and must have a wireless acquisition button, it is necessary to design a side button as an acquisition button to make the product function more in line with human-machine operating habits. Because the digital caliper has a waterproof grade requirement, the location of the side button cannot be fixed by opening a hole on the circuit board to touch the button; and the side acquisition button of the digital caliper is used very frequently, which requires the side button to be very reliable; and because the digital caliper is a handheld tool, the components of the display part must be very light and compact, which limits the internal space that can be used for the side button design to be very small.

[0022] In order to better illustrate the structure of the present invention, it is stipulated that on the front view of the digital caliper, the length direction of the digital display component is set as the X-axis, the width direction is set as the Y-axis, and the thickness direction is positioned as the Z-axis.

[0023] A reliable side-pressing key structure includes a shell 1, a circuit board 2 is arranged in the shell, a key 3 is arranged on the circuit board, a button 4 for pressing the key is arranged on the shell, the key is arranged on the front side of the circuit board, and the pressing direction is the Z-axis direction. The button is arranged on the side of the corresponding circuit board, and the button pressing direction is the Y-axis direction. The buttons are connected by a side pressure lever 5, and a side pressure lever pressing block 51 is arranged above the corresponding key on the side pressure lever 5. One end of the side pressure lever 5 is rotatably connected to the shell through a first rotating shaft 52, and the first rotating shaft is in the X-axis direction. The other end of the side pressure lever swings back and forth in the direction of the key. One end of the button 4 is rotatably connected to the shell through a second rotating shaft 41, and the second rotating shaft is in the Z-axis direction. The other end of the button is movably connected to the swinging end of the side pressure lever. The button 4 is provided with an inclined surface 42 for pressing the swinging end of the side pressure lever to rotate in the direction of the key. A reset elastic member 6 for driving the button to reset is provided in the shell. When in use, the button on the shell is pressed in the Y-axis direction, and the swinging end of the button swings around the second rotating shaft, and the inclined surface on the button presses the swinging end of the side pressure rod to rotate in the direction of the key, and the side pressure lever pressing block presses the key as the side pressure lever rotates; when the button is released, the button is reset under the action of the reset elastic member, and the side pressure lever is also reset under the reset of the key, thereby realizing the reliable conversion of the stroke change of the side pressure button into the effect of pressure triggering on the front button, and the key has good reliability, is not easy to be damaged, and has a long service life; at the same time, the structure is simple and the cost is low.

[0024] In this embodiment, the resetting elastic member is a resetting spring. The button bottom 4 is provided with a spring positioning column 43, and the outer side of the spring positioning column is provided with a spring positioning hole 44. The resetting spring is sleeved on the spring positioning column and is positioned in the spring positioning hole for positioning.

[0025] In this embodiment, a U-shaped groove 11 is provided in the housing 1 to match the first rotating shaft, the first rotating shaft is placed in the U-shaped groove, a pressing plate 12 is provided in the housing to position the first rotating shaft in the U-shaped groove, the pressing plate is provided on the opening of the U-shaped groove, and the pressing plate is fixedly connected to the housing. The pressing plate is pressed on the middle of the first rotating shaft, a pressing plate positioning column 13 and a screw hole 14 are provided on the housing 1, a pressing plate positioning hole matching the pressing plate positioning column and a screw through hole matching the screw hole are provided on the pressing plate, and the pressing plate is fixedly connected to the housing by screws, thereby positioning the first rotating shaft in the housing.

[0026] In this embodiment, the cross section of the side pressure lever pressing block is U-shaped. The U-shaped side pressure lever pressing block enables the side pressure lever pressing block to be in good contact with the key during the rotation process.

[0027] In this embodiment, the contact surface between the swing end of the side pressure rod and the inclined surface is an arc surface. The arc-shaped contact surface enables the swing end of the side pressure rod to contact the inclined surface well during the rotation process, which can make the pressing more stable and smooth.

[0028] In this embodiment, the contact surface between the swing end of the side pressure rod and the inclined surface and the inclined surface are wear-resistant surfaces. The contact surface between the swing end of the side pressure rod and the inclined surface and the inclined surface can be coated with wear-resistant material or made of wear-resistant material to make the contact between the side pressure rod and the inclined surface more stable and improve the service life.

[0029] In this embodiment, a key sealing cover 7 for sealing the key on the circuit board is provided on the circuit board, and the key sealing cover covers the key, and a crimping rib 15 for pressing and sealing the key sealing cover and the circuit board is provided on the housing 1. When the button is pressed, the button presses the button forward through the side pressure lever, which is convenient for the design of the waterproof structure. In this embodiment, a key sealing cover pressing block 71 is provided on the key sealing cover 7 corresponding to the side pressure lever pressing block. This makes it easy to press the key by pressing the lever pressing block, which is easy and labor-saving.

[0030] Although the specific implementation of the utility model is described in detail in conjunction with the drawings, it should not be understood as limiting the protection scope of the utility model. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still belong to the protection scope of the utility model.

Claims

1. A reliable side-pressing key structure, comprising a housing, a circuit board is arranged in the housing, a key is arranged on the circuit board, and a button for pressing the key is arranged on the housing, characterized in that: The button is arranged on the front side of the circuit board, and the button is arranged corresponding to the side of the circuit board. The button is connected to the button through a side pressure lever, and a side pressure lever pressure block is arranged on the side pressure lever corresponding to the top of the button. One end of the side pressure lever is rotatably connected to the shell through a first rotating shaft, and the other end of the side pressure lever swings back and forth in the direction of the button. One end of the button is rotatably connected to the shell through a second rotating shaft, and the other end of the button is movably connected to the swinging end of the side pressure rod lever. The button is provided with an inclined surface for pressing the swinging end of the side pressure rod lever to rotate in the direction of the button, and a reset elastic member for driving the button to reset is arranged in the shell.

2. A reliable side-pressing key structure as claimed in claim 1, characterized in that: The circuit board is provided with a key sealing cover for sealing the key on the circuit board, the key sealing cover covers the key, and the shell is provided with a crimping rib for pressing and sealing the key sealing cover and the circuit board.

3. A reliable side-pressing key structure as claimed in claim 2, characterized in that: A key sealing cover pressing block is arranged on the key sealing cover corresponding to the side pressure lever pressing block.

4. A reliable side-pressing key structure as claimed in claim 1, characterized in that: The resetting elastic member is a resetting spring.

5. A reliable side-pressing key structure as claimed in claim 1, characterized in that: The shell is provided with a U-shaped groove matching with the first rotating shaft, the first rotating shaft is placed in the U-shaped groove, the shell is provided with a pressure plate for positioning the first rotating shaft in the U-shaped groove, the pressure plate is arranged on the opening of the U-shaped groove, and the pressure plate is fixedly connected to the shell.

6. A reliable side-pressing key structure as claimed in claim 1, characterized in that: The cross section of the side pressure lever pressing block is U-shaped.

7. A reliable side-pressing key structure as claimed in claim 1, characterized in that: The contact surface between the swing end of the side pressure rod and the inclined surface is an arc surface.

8. A reliable side-pressing key structure as claimed in claim 1, characterized in that: The contact surface between the swing end of the side pressure rod and the inclined surface and the inclined surface are both wear-resistant surfaces.

Images