CN107170613A

CN107170613A - Press-key structure and its assemble method

Info

Publication number: CN107170613A
Application number: CN201710543390.0A
Authority: CN
Inventors: 黄达雄; 王庆余
Original assignee: Darfon Electronics Suzhou Co Ltd; Darfon Electronics Corp
Current assignee: Darfon Electronics Suzhou Co Ltd; Darfon Electronics Corp
Priority date: 2017-07-05
Filing date: 2017-07-05
Publication date: 2017-09-15
Anticipated expiration: 2037-07-05
Also published as: CN107170613B

Abstract

The invention discloses a kind of press-key structure and its assemble method, the press-key structure includes bottom plate, keycap and connecting rod.First location division of bottom plate has the first Z axis arm and the first Y-axis arm.Second location division has the second Z axis arm and the second Y-axis arm.3rd location division has the 3rd Z axis arm.4th location division has the 4th Z axis arm.Connecting rod has center rod, the first Y-axis bar, the second Y-axis bar, the first X-axis bar and the second X-axis bar.When keycap is moved between pressing position and off-position, first X-axis bar is moved in the first accommodation space in Y direction, first Y-axis arm limits the first X-axis bar in range of movement on Z axis, second X-axis bar is moved in the second accommodation space in Y direction, and the second Y-axis arm limits the second X-axis bar in the range of movement on Z axis.The present invention can install connecting rod, ease of assembly and accuracy height using automated machine, to improve production efficiency, and save manpower assembling.

Description

Key structure and assembling method thereof

Technical Field

The present invention relates to a key structure and an assembling method thereof, and more particularly, to a key structure for an automated mechanical installation and an assembling method thereof.

Background

In the present key structure, in order to make the key move up and down stably, a connecting rod is arranged between the bottom of the keycap and the bottom plate. The connecting rod is U-shaped, and the bottom plate is provided with a pair of positioning grooves for the two sliding rods of the connecting rod to be inserted and slide up and down in the positioning grooves. In order to ensure that the two slide bars do not depart from the positioning grooves, the requirement on the tolerance gap between the two slide bars and the positioning grooves during assembly is high, if the tolerance gap is too small, the two slide bars can not slide smoothly, and if the tolerance gap is too large, the two slide bars can easily fall off. In addition, the design of present connecting rod and constant head tank is unfavorable for automatic machine installation, therefore can't improve production efficiency.

Disclosure of Invention

The invention relates to a key structure and an assembling method thereof, which can adopt automatic machinery to install a connecting rod, are convenient to assemble and have high accuracy, and improve the production efficiency.

In order to achieve the above object, the present invention provides a key structure, which includes a bottom plate, a circuit layer, an elastic body, a supporting structure, a key cap, and a connecting rod. The bottom plate is provided with a bottom plate body, and a first positioning part, a second positioning part, a third positioning part and a fourth positioning part which are mutually separated, wherein the first positioning part and the second positioning part are respectively provided with a first side wall and a second side wall which are erected on the bottom plate body, and the first side wall and the second side wall are respectively provided with a first folding edge and a second folding edge which are parallel to the bottom plate body; the circuit layer is arranged on the bottom plate and is provided with at least one triggering part; the elastic body is arranged on the triggering part; the supporting structure is arranged on the bottom plate; the keycap is arranged on the bottom plate, wherein the keycap is connected with the bottom plate through the supporting structure, and the elastic body can enable the keycap to rise from a pressing position to a releasing position; the connecting rod is connected below the keycap and is provided with a U-shaped body, a first bent part and a second bent part, the first bent part and the second bent part respectively extend from two ends of the U-shaped body to the lower parts of the first folded edge and the second folded edge along a first axis and respectively move in the first interval and the second interval, the first side wall and the second side wall are used for respectively stopping and positioning the first bent part and the second bent part at an assembling position, and the third side wall and the fourth side wall are used for positioning two sides of the U-shaped body.

As an optional technical solution, the third side wall and the fourth side wall are positioned between two inner sides of the U-shaped body; or, two outer sides of the U-shaped body are positioned between the third sidewall and the fourth sidewall.

As an optional technical solution, the first bending portion may be disposed in the first space and moved toward the first sidewall, and the second bending portion may be disposed in the second space and moved toward the second sidewall, so as to assemble the connecting rod.

In addition, the invention also provides an assembling method of the key structure, which comprises the following steps:

placing the first bending part of the connecting rod into the first space between the first side wall and the third side wall;

placing the second bending part of the connecting rod into the second space between the second side wall and the fourth side wall;

horizontally moving the connecting rod to make the connecting rod stopped by the first side wall and the second side wall at an assembling position, wherein the first bending part and the second bending part respectively extend from two ends of the first U-shaped body to the positions below the first folding edge and the second folding edge along the first axis, and the two sides of the U-shaped body are positioned by the third side wall and the fourth side wall; and

the key cap is assembled on the connecting rod, and the key cap is connected with the bottom plate through the supporting structure.

As an optional technical solution, the third sidewall and the fourth sidewall are positioned between two inner sides of the U-shaped body; or, two outer sides of the U-shaped body are positioned between the third sidewall and the fourth sidewall.

The key structure and the assembling method thereof can adopt automatic machinery to install the connecting rod, are convenient to assemble and have high accuracy, so that the production efficiency is improved, the labor assembly is saved, and further the manual installation error and the labor cost are reduced.

In addition, the invention also provides another key structure which comprises a bottom plate, a circuit layer, an elastic body, a supporting structure, a keycap and a first connecting rod. The bottom plate is provided with a bottom plate body, a first positioning part, a second positioning part, a third positioning part, a fourth positioning part and a first stopping part which are separated from each other, wherein the first positioning part is provided with a first side wall standing on the bottom plate body, the second positioning part is provided with a second side wall standing on the bottom plate body, the first side wall and the second side wall are arranged in parallel, and the first side wall and the second side wall are respectively provided with a first folding edge and a second folding edge which are parallel to the bottom plate body, wherein the third positioning part and the fourth positioning part are respectively provided with a third side wall and a fourth side wall which are erected on the bottom plate body, the third sidewall and the fourth sidewall are arranged in parallel, a first distance is formed between the vertical middle line of the first sidewall and the third sidewall, and a second distance is formed between the vertical middle line of the second sidewall and the fourth sidewall; the circuit layer is arranged on the bottom plate and is provided with at least one triggering part; the elastic body is arranged on the triggering part; the supporting structure is arranged on the bottom plate; the keycap is arranged on the bottom plate, wherein the keycap is connected with the bottom plate through the supporting structure, and the elastic body can enable the keycap to rise from a pressing position to a releasing position; the first connecting rod is connected below the keycap and provided with a first U-shaped body, a first bending part and a second bending part, the first bending part and the second bending part respectively extend from two ends of the first U-shaped body to the lower parts of the first folding edge and the second folding edge along a first axis and respectively move in the first interval and the second interval, the first stopping part is vertically arranged on the bottom plate and used for stopping the first connecting rod at an assembling position, and the third side wall and the fourth side wall are used for positioning two sides of the first U-shaped body.

As an optional technical solution, the third side wall and the fourth side wall are positioned between two inner sides of the first U-shaped body; or, two outer sides of the first U-shaped body are positioned between the third sidewall and the fourth sidewall.

As an optional technical solution, the first bending portion may be disposed in the first space and move toward the vertical centerline of the first sidewall, and the second bending portion may be disposed in the second space and move toward the vertical centerline of the second sidewall, so as to assemble the first connecting rod.

As an optional technical solution, the key structure further comprises a second connecting rod connected below the keycap, wherein

The bottom plate is also provided with a fifth positioning part, a sixth positioning part and a second stopping part, wherein the fifth positioning part and the sixth positioning part are respectively provided with a fifth side wall and a sixth side wall which are erected on the bottom plate body, the fifth side wall and the sixth side wall are arranged in parallel, a third distance is arranged between the vertical central line of the first side wall and the fifth side wall, a fourth distance is arranged between the vertical central line of the second side wall and the fourth side wall,

the second connecting rod has a second U-shaped body, a third bending portion and a fourth bending portion, and the third bending portion and the fourth bending portion respectively extend from two ends of the second U-shaped body to below the first folding edge and the second folding edge along a second axis, and respectively move in the third space and the fourth space, wherein the second stopping portion is erected on the bottom plate body to stop the second connecting rod at the assembling position, and the fifth sidewall and the sixth sidewall are used for positioning two sides of the second U-shaped body.

As an optional technical solution, the fifth side wall and the sixth side wall are positioned between two inner sides of the second U-shaped body; or, two outer sides of the second U-shaped body are positioned between the fifth side wall and the sixth side wall.

As an optional technical solution, the third bending portion may be disposed in the third space and move toward the vertical centerline of the first sidewall, and the fourth bending portion may be disposed in the second space and move toward the vertical centerline of the second sidewall, so as to assemble the second connecting bar.

In addition, the invention also provides another assembling method of the key structure, which comprises the following steps:

placing the first bending part of the first connecting rod into the first gap between the vertical center line of the first sidewall and the third sidewall;

placing the second bending part of the first connecting rod into the second gap between the vertical center line of the second sidewall and the fourth sidewall;

horizontally moving the first connecting rod to stop the first connecting rod at the assembling position by the first stopping portion, wherein the first bending portion and the second bending portion respectively extend from two ends of the first U-shaped body to the positions below the first folded edge and the second folded edge along the first axis, and two sides of the first U-shaped body are positioned by the third positioning portion and the fourth positioning portion; and

the key cap is assembled on the first connecting rod, and the key cap is connected with the bottom plate through the supporting structure.

The key structure and the assembling method thereof can adopt automatic machinery to install the first connecting rod and the second connecting rod, are convenient to assemble and have high accuracy, so that the production efficiency is improved, the labor assembly is saved, and further, the manual installation error and the labor cost are reduced.

In addition, the invention also provides another key structure which comprises a bottom plate, a keycap and a connecting rod. The bottom plate is provided with a bottom plate body, a first positioning part, a second positioning part, a third positioning part and a fourth positioning part which are mutually separated; the base plate body extends along a plane defined by the intersection of an X axis and a Y axis, the X axis and the Y axis being orthogonal to the Z axis; the first positioning part is provided with a first Z-axis arm and a first Y-axis arm, the first Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, the first Y-axis arm extends from the first Z-axis arm to the negative direction of the Y axis, and a first accommodating space is defined between the first Y-axis arm and the bottom plate body; the second positioning part is provided with a second Z-axis arm and a second Y-axis arm, the second Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, the second Y-axis arm extends from the second Z-axis arm to the negative direction of the Y axis, and a second containing space is defined between the second Y-axis arm and the bottom plate body; the third positioning part is provided with a third Z-axis arm, the third Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, and a first Y-axis gap is formed between the first Y-axis arm and the third Z-axis arm in the Y-axis direction and is communicated with the first accommodating space; the fourth positioning part is provided with a fourth Z-axis arm, the fourth Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, and a second Y-axis gap is formed between the second Y-axis arm and the fourth Z-axis arm in the Y-axis direction and is communicated with the second accommodating space; the keycap is arranged on the bottom plate, can move up and down relative to the bottom plate and can move between a pressing position and a releasing position; the connecting rod is provided with a central rod, a first Y shaft rod, a second Y shaft rod, a first X shaft rod and a second X shaft rod, the central rod is movably connected with the keycap, the first Y shaft rod and the second Y shaft rod are respectively positioned at two ends of the central rod, the first X shaft rod is connected with the first Y shaft rod, the first X shaft rod extends along the X axis to enter the first accommodating space, the second X shaft rod is connected with the second Y shaft rod, and the second X shaft rod extends along the X axis to enter the second accommodating space; in the X-axis direction, the first Y-axis lever interferes with the third Z-axis arm, the second Y-axis lever interferes with the fourth Z-axis arm, and the third Z-axis arm and the fourth Z-axis arm jointly limit the range of motion of the connecting rod on the X-axis; when the keycap moves between the pressing position and the releasing position, the first X shaft rod moves in the first accommodating space along the Y-axis direction, the first Y-axis arm limits the movement range of the first X shaft rod on the Z axis, the second X shaft rod moves in the second accommodating space along the Y-axis direction, and the second Y-axis arm limits the movement range of the second X shaft rod on the Z axis.

As an optional technical solution, the first Y-axis rod is located on the negative X-axis direction side of the third Z-axis arm, the second Y-axis rod is located on the positive X-axis direction side of the fourth Z-axis arm, and the third Z-axis arm and the fourth Z-axis arm limit the movement range of the connecting rod on the X-axis together; or

The first Y-axis rod is located on the positive X-axis side of the third Z-axis arm, the second Y-axis rod is located on the negative X-axis side of the fourth Z-axis arm, and the third Z-axis arm and the fourth Z-axis arm limit the movement range of the connecting rod on the X axis together.

(1) placing the first X-axis rod into the first Y-axis gap and the second X-axis rod into the second Y-axis gap;

(2) positioning the first Y-axis lever at a first position where X-axis interference with the third Z-axis arm can occur, and positioning the second Y-axis lever at a second position where X-axis interference with the fourth Z-axis arm can occur;

(3) horizontally moving the connecting rod along the positive direction of the Y axis to enable the first X shaft rod to enter the first accommodating space and the second X shaft rod to enter the second accommodating space; and

(4) the key cap is assembled on the central rod, so that the central rod can be movably connected to the key cap.

As an optional technical solution, in the step (2), the first Y axle rod is located at the X-axis negative direction side of the third Z-axis arm, and the second Y axle rod is located at the X-axis positive direction side of the fourth Z-axis arm; or

In step (2), the first Y-axis rod is located on the positive X-axis side of the third Z-axis arm, and the second Y-axis rod is located on the negative X-axis side of the fourth Z-axis arm.

As an optional technical solution, in the step (1), the connecting rod is maintained in a first state, and in the first state, the first X-axis rod and the second X-axis rod are closer to the bottom plate than the central rod, and the connecting rod is lowered onto the bottom plate body first; in step (2), the central rod is lowered onto the bottom plate body toward the Z-axis negative direction.

The key structure and the assembling method thereof can adopt automatic machinery to install the connecting rod, are convenient to assemble and have high accuracy, so that the production efficiency is improved, the labor assembly is saved, and further the manual installation error and the labor cost are reduced. In addition, when the connecting rod is installed by the automatic machine, the connecting rod can be prevented from falling off by limiting the positioning parts in the X-axis direction, the Y-axis direction and the Z-axis direction of the bottom plate, and therefore assembly tolerance is reduced.

In addition, the invention also provides another key structure which comprises a bottom plate, a keycap and a first connecting rod. The bottom plate is provided with a bottom plate body, a first positioning part, a second positioning part, a third positioning part, a fourth positioning part and a first stopping part which are mutually separated; the base plate body extends along a plane defined by the intersection of an X axis and a Y axis, the X axis and the Y axis being orthogonal to the Z axis; the first positioning part is provided with a first Z-axis arm and a first X-axis arm, the first Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, the first X-axis arm extends from the first Z-axis arm to the negative direction of the X axis, and a first accommodating space is defined between the first X-axis arm and the bottom plate body; the second positioning part is provided with a second Z-axis arm and a second X-axis arm, the second Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, the second X-axis arm extends from the second Z-axis arm to the positive direction of the X axis, a second containing space is defined between the second X-axis arm and the bottom plate body, and in the direction of the X axis, the first stopping part is positioned between the first positioning part and the second positioning part; the third positioning part is provided with a third Z-axis arm, the third Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, and in the Y-axis direction, a first Y-axis gap is formed between the first X-axis arm and the third Z-axis arm and is communicated with the first accommodating space; the fourth positioning part is provided with a fourth Z-axis arm, the fourth Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, and in the Y-axis direction, a second Y-axis gap is formed between the second X-axis arm and the fourth Z-axis arm and is communicated with the second accommodating space; the keycap is arranged on the bottom plate, can move up and down relative to the bottom plate and can move between a pressing position and a releasing position; the first connecting rod is provided with a first central rod, a first Y shaft rod, a second Y shaft rod, a first X shaft rod and a second X shaft rod, the first central rod is movably connected with the keycap, the first Y shaft rod and the second Y shaft rod are respectively positioned at two ends of the central rod, the first X shaft rod is connected with the first Y shaft rod, the first X shaft rod extends along the X axis to enter the first accommodating space, the second X shaft rod is connected with the second Y shaft rod, and the second X shaft rod extends along the X axis to enter the second accommodating space; in the X-axis direction, the first Y-axis rod interferes with the third Z-axis arm, the second Y-axis rod interferes with the fourth Z-axis arm, and the third Z-axis arm and the fourth Z-axis arm jointly limit the range of motion of the first connecting rod on the X-axis; when the keycap moves between the pressing position and the releasing position, the first X-axis rod moves in the first accommodating space along the Y-axis direction, the first X-axis arm limits the movement range of the first X-axis rod on the Z-axis, the second X-axis rod moves in the second accommodating space along the Y-axis direction, and the second X-axis arm limits the movement range of the second X-axis rod on the Z-axis, wherein the first connecting rod interferes with the first stopping portion in the Y-axis direction, and the first stopping portion limits the movement range of the first connecting rod on the Y-axis.

As an optional technical solution, the first Y-axis rod is located at the negative X-axis direction side of the third Z-axis arm, the second Y-axis rod is located at the positive X-axis direction side of the fourth Z-axis arm, and the third Z-axis arm and the fourth Z-axis arm limit the movement range of the connecting rod on the X-axis together; or,

As an optional technical solution, the bottom plate further has a fifth positioning portion, a sixth positioning portion and a second stopping portion, the key structure further includes a second connecting rod, in the X-axis direction, the second stopping portion is located between the first positioning portion and the second positioning portion,

the fifth positioning part is provided with a fifth Z-axis arm, the fifth Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, and a third Y-axis gap is formed between the first X-axis arm and the fifth Z-axis arm in the Y-axis direction and is communicated with the first accommodating space;

the sixth positioning part is provided with a sixth Z-axis arm, the sixth Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, a fourth Y-axis gap is formed between the second X-axis arm and the sixth Z-axis arm in the Y-axis direction, and the fourth Y-axis gap is communicated with the second accommodating space;

the second connecting rod is provided with a second central rod, a third Y shaft rod, a fourth Y shaft rod, a third X shaft rod and a fourth X shaft rod, the second central rod is movably connected with the keycap, the third Y shaft rod and the fourth Y shaft rod are respectively positioned at two ends of the central rod, the third X shaft rod is connected with the third Y shaft rod, the third X shaft rod extends along the X axis to enter the first accommodating space, the fourth X shaft rod is connected with the fourth Y shaft rod, and the fourth X shaft rod extends along the X axis to enter the second accommodating space;

in the X-axis direction, the third Y-axis rod interferes with the fifth Z-axis arm, the fourth Y-axis rod interferes with the sixth Z-axis arm, and the fifth Z-axis arm and the sixth Z-axis arm jointly limit the range of motion of the second connecting rod on the X-axis;

wherein, when the key cap moves between the pressing position and the releasing position, the third X-axis rod moves along the Y-axis direction in the first accommodating space, the first X-axis arm limits the movement range of the third X-axis rod on the Z-axis, the fourth X-axis rod moves along the Y-axis direction in the second accommodating space, and the second X-axis arm limits the movement range of the fourth X-axis rod on the Z-axis,

in the Y-axis direction, the second connecting rod interferes with the second stopping portion, and the second stopping portion limits the movement range of the second connecting rod on the Y-axis.

As an optional technical solution, the third Y-axis rod is located on the negative X-axis direction side of the fifth Z-axis arm, the fourth Y-axis rod is located on the positive X-axis direction side of the sixth Z-axis arm, and the fifth Z-axis arm and the sixth Z-axis arm limit the range of motion of the second connecting rod on the X-axis together; or,

the third Y-axis lever is located on the positive X-axis side of the fifth Z-axis arm, the fourth Y-axis lever is located on the negative X-axis side of the sixth Z-axis arm, and the fifth Z-axis arm and the sixth Z-axis arm limit the range of motion of the second connecting rod on the X-axis together.

As an optional technical solution, the first stopping portion and the second stopping portion are both located in an area surrounded by the first connecting rod and the second connecting rod together.

(3) horizontally moving the first connecting rod along the positive direction of the Y axis to enable the first X-axis rod to enter the first accommodating space, enable the second X-axis rod to enter the second accommodating space, and enable the first stopping part to be located at a third position where Y-axis interference can occur with the first connecting rod; and

(4) the key cap is assembled on the first central rod, so that the first central rod is movably connected to the key cap.

As an optional technical solution, in the step (1), the first connecting rod is maintained in a second state, in the second state, the first X-axis rod and the second X-axis rod are closer to the bottom plate than the first central rod, and the first connecting rod is lowered onto the bottom plate body first; in step (2), the first center rod is lowered onto the bottom plate body toward the Y-axis negative direction.

As an alternative solution, in case of including the second connecting rod,

in the step (1), the third X-axis rod is disposed in the third Y-axis gap, and the fourth X-axis rod is disposed in the fourth Y-axis gap;

in the step (2), the third Y-axis rod is located at a fourth position where the third Y-axis rod can generate X-axis interference with the fifth Z-axis arm, and the fourth Y-axis rod is located at a fifth position where the fourth Y-axis rod can generate X-axis interference with the sixth Z-axis arm;

in the step (3), the second connecting rod is horizontally moved along the Y-axis negative direction, so that the third X-axis rod enters the first receiving space, the fourth X-axis rod enters the second receiving space, and the second stopping portion is located at a sixth position where the Y-axis interference with the second connecting rod can occur; and

in step (4), assembling the key cap on the second central rod, so that the second central rod is movably connected to the key cap.

The key structure and the assembling method thereof can adopt automatic machinery to install the first connecting rod and the second connecting rod, are convenient to assemble and have high accuracy, so that the production efficiency is improved, the labor assembly is saved, and further, the manual installation error and the labor cost are reduced. In addition, when the first connecting rod and the second connecting rod are installed by the automatic machine, the first connecting rod and the second connecting rod can be prevented from falling off by virtue of the position limitation of the positioning parts in the X-axis direction, the Y-axis direction and the Z-axis direction of the bottom plate, so that the assembling tolerance is reduced.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

FIGS. 1A and 1B are exploded views of a key structure according to a first embodiment of the present invention;

FIGS. 2A and 2B are schematic top views illustrating a key structure assembling method according to a first embodiment of the invention;

fig. 3A to 3D are schematic side views illustrating a key structure assembling method according to an embodiment of the invention;

FIGS. 4A and 4B are exploded views of a key structure according to a second embodiment of the present invention;

FIGS. 5A and 5B are schematic top views illustrating a key structure assembling method according to a second embodiment of the invention;

FIGS. 6A to 6D are schematic side views illustrating a key structure assembling method according to a second embodiment of the invention;

FIGS. 7A-7B are schematic views illustrating the up-and-down movement of the key structure according to the first embodiment of the invention;

fig. 8A to 8B are schematic diagrams illustrating the up-and-down movement of the key structure according to the second embodiment of the invention.

Detailed Description

The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. The directional terms used in the present invention, such as "up", "down", "front", "back", "left", "right", "side", etc., refer to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention.

In the following embodiments, the same portions are denoted by the same reference numerals in different drawings.

Referring to fig. 1A, fig. 1B, fig. 2A and fig. 2B, a key structure 100 according to a first embodiment of the invention includes a base plate 101, a circuit layer 102, an elastic body 103, a supporting structure 104, a key cap 105 and a connecting rod 106. The bottom plate 101 has a bottom plate body 1011 and a first positioning portion 111, a second positioning portion 112, a third positioning portion 113 and a fourth positioning portion 114 separated from each other, wherein the first positioning portion 111 and the second positioning portion 112 respectively have a first side wall 1111 and a second side wall 1121 standing on the bottom plate body 1011 (i.e. the first positioning portion 111 has a first side wall 1111 standing on the bottom plate body 1011, and the second positioning portion 112 has a second side wall 1121 standing on the bottom plate body 1011). The first side wall 1111 and the second side wall 1121 are respectively provided with a first folding edge 1112 and a second folding edge 1122 parallel to the bottom plate body 1011 (i.e. the first side wall 1111 is provided with the first folding edge 1112 parallel to the bottom plate body 1011, and the second side wall 1121 is provided with the second folding edge 1122 parallel to the bottom plate body 1011). The third positioning portion 113 and the fourth positioning portion 114 respectively have a third sidewall 1131 and a fourth sidewall 1141 standing on the bottom plate body 1011 (i.e., the third positioning portion 113 has the third sidewall 1131 standing on the bottom plate body 1011, and the fourth positioning portion 114 has the fourth sidewall 1141 standing on the bottom plate body 1011), the third sidewall 1131 and the fourth sidewall 1141 are disposed in parallel, and a first distance (corresponding to the first Y-axis gap) is provided between the first sidewall 1111 and the third sidewall 1131, and a second distance (corresponding to the second Y-axis gap) is provided between the second sidewall 1121 and the fourth sidewall 1141.

As shown in the coordinate axes of the drawing, the base plate body 1011 extends along a plane defined by the intersection of the X-axis and the Y-axis, which are orthogonal to each other. The first side wall 1111 is defined as a first Z-axis arm 1111, the second side wall 1121 is defined as a second Z-axis arm 1121, the first folding edge 1112 is defined as a first Y-axis arm 1112, the second folding edge 1122 is defined as a second Y-axis arm 1122, the third side wall 1131 is defined as a third Z-axis arm 1131, and the fourth side wall 1141 is defined as a fourth Z-axis arm 1141. The first Z-axis arm 1111 extends from the bottom plate body 1011 substantially toward the positive Z-axis direction, the first Y-axis arm 1112 extends from the upper end of the first Z-axis arm 1111 substantially toward the negative Y-axis direction, and a first receiving space C1 is defined between the first Y-axis arm 1112 and the bottom plate body 1011. In addition, the second Z-axis arm 1121 extends from the bottom plate body 1011 toward the positive Z-axis direction, the second Y-axis arm 1122 extends from the upper end of the second Z-axis arm 1121 toward the negative Y-axis direction, and a second storage space C2 is defined between the second Y-axis arm 1122 and the bottom plate body 1011. The third Z-axis arm 1131 extends from the base plate body 1011 in the positive Z-axis direction, and the first Y-axis gap Δ Y1 is provided between the first Y-axis arm 1112 and the third Z-axis arm 1131 in the Y-axis direction, and the first Y-axis gap Δ Y1 communicates with the first housing space C1. Further, the fourth Z-axis arm 1141 extends from the base plate body 1011 in the positive Z-axis direction, and a second Y-axis gap Δ Y2 is provided between the second Y-axis arm 1122 and the fourth Z-axis arm 1141 in the Y-axis direction, and the second Y-axis gap Δ Y2 communicates with the second housing space C2.

In one embodiment, the circuit layer 102 is disposed on the bottom plate 101, and the circuit layer 102 has at least one triggering portion 1021. The elastic body 103 is provided on the trigger 1021. The circuit layer 102 is, for example, a thin film circuit board, the triggering portion 1021 is, for example, a membrane switch, the elastic body 103 is, for example, a rubber dome (rubber dome) or other elastic structure, and the elastic body 103 can enable the key cap 105 to ascend from a lower position (or a pressing position, the same below) to a higher position (or a releasing position, the same below). When the key cap 105 is pressed, the triggering portion 1021 is triggered by the elastic body 103 to be electrically conducted, so as to generate a pressing signal correspondingly.

Furthermore, a support structure 104 is provided on the base plate 101. The key cap 105 is disposed on the base plate 101, and the key cap 105 is connected to the base plate 101 through the supporting structure 104. The support structure 104 is, for example, a crater plunger structure or a scissor structure; the drawings illustrate a scissors structure, in which each arm 104a, 104b is pivotally or slidably connected between the key cap 105 and the base 101, so that the key cap 105 can move up and down relative to the base 101. The bottom of the key cap 105 is provided with a plurality of pivot holes 1051, so that the key cap 105 is connected to the support structure 104 and the connecting rod 106 respectively.

In addition, the connecting rod 106 is connected under the key cap 105, the connecting rod 106 has a U-shaped body 1066, a first bending portion 1064 and a second bending portion 1065, and the first bending portion 1064 and the second bending portion 1065 extend from two ends of the U-shaped body 1066 along a first axis (i.e., an X axis) to below the first folding edge 1112 and the second folding edge 1122 respectively and move in the first receiving space C1 and the second receiving space C2 respectively (i.e., the first bending portion 1064 extends from one end of the U-shaped body 1066 along the first axis to below the first folding edge 1112 and moves in the first receiving space C1, and the second bending portion 1065 extends from the other end of the U-shaped body 1066 along the first axis to below the second folding edge 1122 and moves in the second receiving space C2). In the present embodiment, the first side wall 1111 and the second side wall 1121 are used for stopping and positioning the first bending portion 1064 and the second bending portion 1065 at an assembling position, and the third side wall 1131 and the fourth side wall 1141 are used for positioning two sides of the U-shaped body 1066.

As shown in the coordinate axes, the U-shaped body 1066 is defined as having a central rod 1061, a first Y-axis 1062 and a second Y-axis 1063, the first bent portion 1064 is defined as a first X-axis 1064, and the second bent portion 1065 is defined as a second X-axis 1065. The central rod 1061 is movably connected to the key cap 105, the first Y shaft 1062 and the second Y shaft 1063 are respectively located at two ends of the central rod 1061, and the first Y shaft 1062 and the second Y shaft 1063 extend from the central rod 1061 to the positive direction of the Y axis. In addition, the first X shaft 1064 is coupled to the first Y shaft 1062, and the first X shaft 1064 extends along the X axis into the first receiving space C1. The second X shaft 1065 is coupled to the second Y shaft 1063, and the second X shaft 1065 extends along the X axis into the second receiving space C2.

In the present embodiment, in the X-axis direction, the first Y-axis 1062 interferes with the third Z-axis arm 1131, the second Y-axis 1063 interferes with the fourth Z-axis arm 1141, and the third Z-axis arm 1131 and the fourth Z-axis arm 1141 limit the movement range of the connecting rod 106 on the X-axis. In addition, referring to fig. 7A and 7B, when the key cap 105 moves between the lower position and the upper position, the first X-axis 1064 moves along the Y-axis direction in the corresponding first receiving space C1, the first Y-axis arm 1112 limits the movement range of the first X-axis 1064 on the Z-axis, the second X-axis 1065 moves along the Y-axis direction in the corresponding second receiving space C2, and the second Y-axis arm 1122 limits the movement range of the second X-axis 1065 on the Z-axis.

Referring to fig. 1A, the first Y-axis 1062 is located on the negative X-axis side of the third Z-axis arm 1131, the second Y-axis 1063 is located on the positive X-axis side of the fourth Z-axis arm 1141, and the third Z-axis arm 1131 and the fourth Z-axis arm 1141 limit the range of motion of the connecting rod 106 on the X-axis. That is, the third and fourth sidewalls 1131 and 1141 are positioned between the two inner sides of the U-shaped body 1066 of the connecting rod 106 to limit the range of motion of the connecting rod 106 in the X-axis. In another embodiment (not shown), the first Y-axis 1062 may also be located on the positive X-axis side of the third Z-axis arm 1131, the second Y-axis 1063 may also be located on the negative X-axis side of the fourth Z-axis arm 1141, and the third Z-axis arm 1131 and the fourth Z-axis arm 1141 jointly limit the movement range of the connecting rod 106 on the X-axis. That is, the two outer sides of the U-shaped body 1066 of the connecting rod 106 are positioned between the third sidewall 1131 and the fourth sidewall 1141 to limit the range of motion of the connecting rod 106 in the X-axis.

Referring to fig. 2A and 2B, the key structure 100 is assembled as follows. In step (1), the first bent portion 1064 of the connecting rod 106 is disposed in the first gap between the first sidewall 1111 and the third sidewall 1131, and the second bent portion 1065 of the connecting rod 106 is disposed in the second gap between the second sidewall 1121 and the fourth sidewall 1141. That is, the first X-axis 1064 is placed in the first Y-axis gap Δ Y1 and the second X-axis 1065 is placed in the second Y-axis gap Δ Y2. Next, in step (2), the first Y shaft 1062 is located at a first position where the first Y shaft can be in X-axis interference with the third Z shaft 1131, and the second Y shaft 1063 is located at a second position where the second Y shaft can be in X-axis interference with the fourth Z shaft 1141, so that the two sides of the U-shaped body 1066 are located by the third side wall 1131 and the fourth side wall 1141. Next, in step (3), the connecting rod 106 is horizontally moved along the positive direction of the Y axis, so that the first X shaft 1064 enters the first receiving space C1, and the second X shaft 1065 enters the second receiving space C2, so that the connecting rod 106 is stopped by the first side wall 1111 and the second side wall 1121 at the assembling position. Next, in step (4), the key cap 105 is assembled on the central rod 1061, such that the central rod 1061 is movably connected to the key cap 105, and the key cap 105 can be connected to the base plate 101 through the supporting structure 104, thereby completing the assembly of the key structure 100.

Then, referring to fig. 3A to 3B, in step (1), the connecting rod 106 may be maintained in a posture that the central rod 1061 is located at a higher position and the first X shaft 1064 and the second X shaft 1065 are located at a lower position (i.e., the connecting rod 106 is in a first state, in which the first X shaft 1064 and the second X shaft 1065 are closer to the bottom plate 101 than the central rod 1061), and the connecting rod 106 is first lowered onto the bottom plate body 1011 (i.e., the first X shaft 1064 and the second X shaft 1065 are first brought into contact with the bottom plate body 1011); referring to fig. 3C to fig. 3D, in step (2), the central rod 1061 is lowered onto the bottom plate body 1011 in the negative Z-axis direction. Then, the connecting rod 106 is horizontally moved, so that the first X shaft 1064 enters the first receiving space C1, and the second X shaft 1065 enters the second receiving space C2.

The assembly method of the key structure 100 according to the above embodiment of the invention can adopt an automatic machine to install the connecting rod 106, so that the assembly is convenient and the accuracy is high, thereby improving the production efficiency, saving the labor for assembly, and further reducing the manual installation error and the labor cost. In addition, when the connecting rod 106 is installed by an automated machine, the connecting rod 106 can be prevented from falling off by the positioning part limitation in the X-axis direction, the Y-axis direction and the Z-axis direction of the bottom plate 101, thereby reducing the assembly tolerance.

Referring to fig. 4A, fig. 4B, fig. 5A and fig. 5B, a key structure 200 according to a second embodiment of the invention includes a bottom plate 201, a circuit layer 202, an elastic body 203, a supporting structure 204, a key cap 205, a first connecting rod 206 and a second connecting rod 207. The bottom plate 201 has a bottom plate body 2011 and a first positioning portion 211, a second positioning portion 212, a third positioning portion 213, a fourth positioning portion 214, a fifth positioning portion 215, a sixth positioning portion 216, a first stopper 217 and a second stopper 218 which are separated from each other. The present embodiment is different from the first embodiment in that: the first positioning portion 211 is defined as having a first Z-axis arm 2111 (or called a first side wall 2111) and a first X-axis arm 2112 (or called a first folded edge 2112), the first X-axis arm 2112 extends from the upper end of the first Z-axis arm 2111 substantially toward the negative X-axis direction, and a first receiving space C1 is defined between the first X-axis arm 2112 and the bottom plate body 2011. In addition, the second positioning portion 212 is defined as having a second Z-axis arm 2121 (or called a second side wall 2121) and a second X-axis arm 2122 (or called a second folded edge 2122), the second X-axis arm 2122 extends from the upper end of the second Z-axis arm 2121 toward the positive direction of the X-axis, and a second receiving space C2 is defined between the second X-axis arm 2122 and the bottom plate 2011. In addition, the third positioning portion 213 is defined to have a third Z-axis arm 2131 (or a third side wall 2131); in the Y-axis direction, a first Y-axis gap Δ Y1 is provided between the first X-axis arm 2112 and the third Z-axis arm 2131, and the first Y-axis gap Δ Y1 communicates with the first housing space C1. Furthermore, the fourth positioning portion 214 is defined to have a fourth Z-axis arm 2141 (or a fourth sidewall 2141); in the Y-axis direction, a second Y-axis gap Δ Y2 is provided between the second X-axis arm 2122 and the fourth Z-axis arm 2141, and the second Y-axis gap Δ Y2 communicates with the second housing space C2. That is, in the Y-axis direction, the vertical centerline 2101 of the first sidewall 2111 and the third sidewall 2131 have a first spacing (corresponding to the first Y-axis gap) therebetween, and the vertical centerline 2102 of the second sidewall 2121 and the fourth sidewall 2141 have a second spacing (corresponding to the second Y-axis gap) therebetween. In addition, in the X-axis direction, the first stopping portion 217 is located between the first positioning portion 211 and the second positioning portion 212 for stopping the first connecting rod 206 at the assembling position, and the second stopping portion 218 is located between the first positioning portion 211 and the second positioning portion 212 for stopping the second connecting rod 207 at the assembling position. In an embodiment, the first stopping portion 217 and the second stopping portion 218 are both located in an area surrounded by the first connecting rod 206 and the second connecting rod 206.

Furthermore, the difference between the present embodiment and the first embodiment is: the bottom plate 201 further has a fifth detent 215 and a sixth detent 216, the interaction between the fifth detent 215 and the second connecting rod 207 is similar to the interaction between the third detent 213 and the first connecting rod 206, and the interaction between the sixth detent 216 and the second connecting rod 207 is similar to the interaction between the fourth detent 214 and the first connecting rod 206, please refer to the above description, which will not be repeated herein.

Although the above embodiments are described by taking two connecting rods as an example, the embodiments can also be implemented by using a single connecting rod, and the invention is not limited thereto. The structure and assembly of the first connecting rod 206 are the same as those of the second connecting rod 207, and therefore, the first connecting rod 206 is only used as an example for detailed description. The definitions of the first central rod 2061, the first Y-axis rod 2062, the second Y-axis rod 2063, the first X-axis rod 2064, and the second X-axis rod 2065 in the first connecting rod 206 are the same as those of the connecting rod 106 in the first embodiment, and the same components are denoted by the same reference numerals and will not be described again.

In the present embodiment, in the X-axis direction, the first Y-axis rod 2062 interferes with the third Z-axis arm 2131, the second Y-axis rod 2063 interferes with the fourth Z-axis arm 2141, and the third Z-axis arm 2131 and the fourth Z-axis arm 2141 jointly limit the movement range of the first connecting rod 206 in the X-axis direction. Further, similarly to the first embodiment: referring to fig. 8A and 8B, when the key cap 205 moves between the lower position and the upper position, the first X-axis rod 2064 moves along the Y-axis direction in the corresponding first receiving space C1, and the first X-axis arm 2112 limits the movement range of the first X-axis rod 2064 on the Z-axis; the second X shaft 2065 moves in the corresponding second receiving space C2 along the Y-axis direction, and the second X-axis arm 2122 limits the range of movement of the second X shaft 2065 in the Z-axis direction. The same is true of the second connecting rod 207.

In addition, the difference from the first embodiment is: in the Y-axis direction, the first connecting rod 206 interferes with the first stopping portion 217, and the first stopping portion 217 limits the moving range of the first connecting rod 206 in the Y-axis direction. Similarly, in the Y-axis direction, the second connecting rod 207 interferes with the second stopping portion 218, and the second stopping portion 218 limits the moving range of the second connecting rod 206 in the Y-axis direction.

Referring to fig. 5A and 5B, the key structure 200 is assembled as follows. In step (1), the first bending portion 2064 of the first connecting rod 206 is inserted into the first gap between the vertical central line 2101 of the first sidewall 2111 and the third sidewall 2131, and the second bending portion 2065 of the first connecting rod 206 is inserted into the second gap between the vertical central line 2102 of the second sidewall 2121 and the fourth sidewall 2141. That is, the first X-axis rod 2064 is disposed in the first Y-axis gap Δ Y1, and the second X-axis rod 2065 is disposed in the second Y-axis gap Δ Y2. Next, in step (2), the first Y-axis rod 2062 is located at a first position where the first Y-axis rod can be in X-axis interference with the third Z-axis arm 2131, and the second Y-axis rod 2063 is located at a second position where the second Y-axis rod can be in X-axis interference with the fourth Z-axis arm 2141, so that the two sides of the U-shaped body 2066 are located by the third side wall 2131 and the fourth side wall 2141. Next, in step (3), the first connecting rod 206 is horizontally moved along the positive direction of the Y axis, so that the first X shaft 2064 enters the first receiving space C1, and the second X shaft 2065 enters the second receiving space C2, so that the first connecting rod 206 is stopped by the first stopping portion 217 at the assembling position. That is, the first stopping portion 217 is located at a third position where the Y-axis interference with the first connecting rod 206 can occur. Similarly, the second connecting rod 207 is also performed in the same manner as the above steps (1) to (3). Next, in step (4), the key cap 205 is assembled on the supporting structure 204, the first connecting rod 206 and the second connecting rod 207 at the same time, so that the first connecting rod 206 and the second connecting rod 207 are movably connected to the key cap 205, and the key cap 205 is connected to the bottom plate 201 through the supporting structure 204, thereby completing the assembly of the key structure 200.

Next, referring to fig. 6A to 6B, in step (1), the first connecting rod 206 may be maintained in a posture that the first central rod 2061 is higher and the first X-axis rod 2064 and the second X-axis rod 2065 are lower (i.e., the first connecting rod 206 is in the second state, and in the second state, the first X-axis rod 2064 and the second X-axis rod 2065 are closer to the bottom plate 101 than the first central rod 2061), and the first connecting rod 206 is first lowered onto the bottom plate body 2011 (i.e., the first X-axis rod 2064 and the second X-axis rod 2065 are first brought into contact with the bottom plate body 1011); referring to fig. 6C to 6D, in step (2), the first central rod 2061 is lowered onto the bottom plate 2011 in the negative Z-axis direction. Then, the first connecting rod 206 is horizontally moved, so that the first X shaft 2064 enters the first receiving space C1, and the second X shaft 2065 enters the second receiving space C2. The same is true of the second connecting rod 207.

The assembly method of the key structure 200 according to the above embodiment of the invention can adopt automatic mechanical installation of the first connecting rod 206 and the second connecting rod 207, so that the assembly is convenient and the accuracy is high, the production efficiency is improved, the labor assembly is saved, and further the manual installation error and the labor cost are reduced. In addition, when the first connecting rod 206 and the second connecting rod 207 are installed by the automated machine, the first connecting rod 206 and the second connecting rod 207 can be prevented from falling off by the positioning part limitation in the X-axis direction, the Y-axis direction and the Z-axis direction of the bottom plate 201, thereby reducing the assembly tolerance.

The above detailed description of the preferred embodiments is intended to more clearly illustrate the features and spirit of the present invention, and is not intended to limit the scope of the present invention by the preferred embodiments disclosed above. On the contrary, it is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims. The scope of the claims to be accorded the invention is therefore to be accorded the broadest interpretation so as to encompass all such modifications and equivalent arrangements as is known in the art.

Claims

1. A key structure, comprising:

a bottom plate having a bottom plate body and a first positioning portion, a second positioning portion, a third positioning portion and a fourth positioning portion separated from each other, wherein the first positioning portion and the second positioning portion respectively have a first side wall and a second side wall standing upright on the bottom plate body, and the first side wall and the second side wall are respectively provided with a first folding edge and a second folding edge parallel to the bottom plate body,

the third positioning part and the fourth positioning part are respectively provided with a third side wall and a fourth side wall which are erected on the bottom plate body, the third side wall and the fourth side wall are arranged in parallel, a first interval is formed between the first side wall and the third side wall, and a second interval is formed between the second side wall and the fourth side wall;

the circuit layer is arranged on the bottom plate and is provided with at least one triggering part;

an elastic body arranged on the trigger part;

the supporting structure is arranged on the bottom plate;

a keycap disposed on the base plate, wherein the keycap is connected to the base plate via the support structure, and the elastic body can raise the keycap from a pressed position to a released position; and

the connecting rod is connected below the keycap and provided with a U-shaped body, a first bent part and a second bent part, the first bent part and the second bent part respectively extend from two ends of the U-shaped body to the lower parts of the first folded edge and the second folded edge along a first axis and respectively move in the first interval and the second interval, the first side wall and the second side wall are used for respectively stopping and positioning the first bent part and the second bent part on an assembly position, and the third side wall and the fourth side wall are used for positioning two sides of the U-shaped body.

2. The key structure according to claim 1, wherein: the third side wall and the fourth side wall are positioned between two inner sides of the U-shaped body; or, two outer sides of the U-shaped body are positioned between the third sidewall and the fourth sidewall.

3. The key structure according to claim 1, wherein: the first bending part can be placed in the first space and move towards the first side wall, and the second bending part can be placed in the second space and move towards the second side wall, so that the connecting rod is assembled.

4. A method of assembling a key structure according to claim 1, comprising:

5. The method of assembling a key structure according to claim 4, wherein: the third side wall and the fourth side wall are positioned between two inner sides of the U-shaped body; or, two outer sides of the U-shaped body are positioned between the third sidewall and the fourth sidewall.

6. A key structure, comprising:

a bottom plate having a bottom plate body, and a first positioning portion, a second positioning portion, a third positioning portion, a fourth positioning portion and a first stopping portion separated from each other, wherein the first positioning portion has a first sidewall standing upright on the bottom plate body, the second positioning portion has a second sidewall standing upright on the bottom plate body, the first sidewall and the second sidewall are arranged in parallel, and the first sidewall and the second sidewall are respectively provided with a first folding edge and a second folding edge parallel to the bottom plate body,

the third positioning part and the fourth positioning part are respectively provided with a third side wall and a fourth side wall which are erected on the bottom plate body, the third side wall and the fourth side wall are arranged in parallel, a first distance is formed between a vertical center line of the first side wall and the third side wall, and a second distance is formed between a vertical center line of the second side wall and the fourth side wall;

an elastic body arranged on the trigger part;

the supporting structure is arranged on the bottom plate;

the first connecting rod is connected below the keycap and provided with a first U-shaped body, a first bent part and a second bent part, the first bent part and the second bent part respectively extend to the lower parts of the first folded edge and the second folded edge from two ends of the first U-shaped body along a first axis and respectively move in the first interval and the second interval, the first stopping part is vertically arranged on the bottom plate and used for stopping the first connecting rod at an assembling position, and the third side wall and the fourth side wall are used for positioning two sides of the first U-shaped body.

7. The key structure according to claim 6, wherein: the third side wall and the fourth side wall are positioned between two inner sides of the first U-shaped body; or, two outer sides of the first U-shaped body are positioned between the third sidewall and the fourth sidewall.

8. The key structure according to claim 6, wherein: the first bending part can be placed in the first space and move towards the vertical midline of the first side wall, and the second bending part can be placed in the second space and move towards the vertical midline of the second side wall, so as to assemble the first connecting rod.

9. The key structure according to claim 6, wherein: the key structure further comprises a second connecting rod connected below the keycap, wherein

10. The key structure according to claim 9, wherein: the fifth side wall and the sixth side wall are positioned between two inner sides of the second U-shaped body; or, two outer sides of the second U-shaped body are positioned between the fifth side wall and the sixth side wall.

11. The key structure according to claim 9, wherein: the third bending part can be placed in the third space and move towards the vertical midline of the first side wall, and the fourth bending part can be placed in the second space and move towards the vertical midline of the second side wall, so as to assemble the second connecting rod.

12. A method of assembling a key structure according to claim 6, comprising:

13. The method of assembling a key structure of claim 12, wherein: the third side wall and the fourth side wall are positioned between two inner sides of the first U-shaped body; or, two outer sides of the first U-shaped body are positioned between the third sidewall and the fourth sidewall.

14. A key structure, comprising:

the bottom plate is provided with a bottom plate body, and a first positioning part, a second positioning part, a third positioning part and a fourth positioning part which are mutually separated;

the base plate body extends along a plane defined by the intersection of an X axis and a Y axis, the X axis and the Y axis being orthogonal to the Z axis;

the first positioning part is provided with a first Z-axis arm and a first Y-axis arm, the first Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, the first Y-axis arm extends from the first Z-axis arm to the negative direction of the Y axis, and a first accommodating space is defined between the first Y-axis arm and the bottom plate body;

the second positioning part is provided with a second Z-axis arm and a second Y-axis arm, the second Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, the second Y-axis arm extends from the second Z-axis arm to the negative direction of the Y axis, and a second containing space is defined between the second Y-axis arm and the bottom plate body;

the third positioning part is provided with a third Z-axis arm, the third Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, and a first Y-axis gap is formed between the first Y-axis arm and the third Z-axis arm in the Y-axis direction and is communicated with the first accommodating space;

the fourth positioning part is provided with a fourth Z-axis arm, the fourth Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, and a second Y-axis gap is formed between the second Y-axis arm and the fourth Z-axis arm in the Y-axis direction and is communicated with the second accommodating space;

the keycap is arranged on the bottom plate, can move up and down relative to the bottom plate and can move between a pressing position and a releasing position; and

the connecting rod is provided with a central rod, a first Y shaft rod, a second Y shaft rod, a first X shaft rod and a second X shaft rod, the central rod is movably connected to the keycap, the first Y shaft rod and the second Y shaft rod are respectively positioned at two ends of the central rod, the first X shaft rod is connected with the first Y shaft rod, the first X shaft rod extends along the X axis to enter the first accommodating space, the second X shaft rod is connected with the second Y shaft rod, and the second X shaft rod extends along the X axis to enter the second accommodating space;

in the X-axis direction, the first Y-axis lever interferes with the third Z-axis arm, the second Y-axis lever interferes with the fourth Z-axis arm, and the third Z-axis arm and the fourth Z-axis arm jointly limit the range of motion of the connecting rod on the X-axis;

when the keycap moves between the pressing position and the releasing position, the first X shaft rod moves in the first accommodating space along the Y-axis direction, the first Y-axis arm limits the movement range of the first X shaft rod on the Z axis, the second X shaft rod moves in the second accommodating space along the Y-axis direction, and the second Y-axis arm limits the movement range of the second X shaft rod on the Z axis.

15. The key structure according to claim 14, wherein: the first Y-axis rod is positioned on the X-axis negative direction side of the third Z-axis arm, the second Y-axis rod is positioned on the X-axis positive direction side of the fourth Z-axis arm, and the third Z-axis arm and the fourth Z-axis arm jointly limit the movement range of the connecting rod on the X axis; or

16. A method of assembling a key structure according to claim 14, comprising the steps of:

17. The method of assembling a key structure of claim 16, wherein: in step (2), the first Y-axis rod is located on the negative X-axis side of the third Z-axis arm, and the second Y-axis rod is located on the positive X-axis side of the fourth Z-axis arm; or

18. The method of assembling a key structure of claim 16, wherein: in the step (1), the connecting rod is kept in a first state, and in the first state, the first X shaft rod and the second X shaft rod are closer to the bottom plate than the central rod, so that the connecting rod is firstly descended onto the bottom plate body; in step (2), the central rod is lowered onto the bottom plate body toward the Z-axis negative direction.

19. A key structure, comprising:

the bottom plate is provided with a bottom plate body, and a first positioning part, a second positioning part, a third positioning part, a fourth positioning part and a first stopping part which are mutually separated;

the first positioning part is provided with a first Z-axis arm and a first X-axis arm, the first Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, the first X-axis arm extends from the first Z-axis arm to the negative direction of the X axis, and a first accommodating space is defined between the first X-axis arm and the bottom plate body;

the second positioning part is provided with a second Z-axis arm and a second X-axis arm, the second Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, the second X-axis arm extends from the second Z-axis arm to the positive direction of the X axis, a second containing space is defined between the second X-axis arm and the bottom plate body, and in the direction of the X axis, the first stopping part is positioned between the first positioning part and the second positioning part;

the third positioning part is provided with a third Z-axis arm, the third Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, and in the Y-axis direction, a first Y-axis gap is formed between the first X-axis arm and the third Z-axis arm and is communicated with the first accommodating space;

the fourth positioning part is provided with a fourth Z-axis arm, the fourth Z-axis arm extends from the bottom plate body to the positive direction of the Z axis, and in the Y-axis direction, a second Y-axis gap is formed between the second X-axis arm and the fourth Z-axis arm and is communicated with the second accommodating space;

the first connecting rod is provided with a first central rod, a first Y shaft rod, a second Y shaft rod, a first X shaft rod and a second X shaft rod, the first central rod is movably connected to the keycap, the first Y shaft rod and the second Y shaft rod are respectively positioned at two ends of the central rod, the first X shaft rod is connected with the first Y shaft rod, the first X shaft rod extends along the X axis to enter the first accommodating space, the second X shaft rod is connected with the second Y shaft rod, and the second X shaft rod extends along the X axis to enter the second accommodating space;

in the X-axis direction, the first Y-axis rod interferes with the third Z-axis arm, the second Y-axis rod interferes with the fourth Z-axis arm, and the third Z-axis arm and the fourth Z-axis arm jointly limit the range of motion of the first connecting rod on the X-axis;

wherein, when the keycap moves between the pressing position and the releasing position, the first X-axis rod moves along the Y-axis direction in the first accommodating space, the first X-axis arm limits the movement range of the first X-axis rod on the Z-axis, the second X-axis rod moves along the Y-axis direction in the second accommodating space, and the second X-axis arm limits the movement range of the second X-axis rod on the Z-axis,

in the Y-axis direction, the first connecting rod interferes with the first stopping portion, and the first stopping portion limits the range of motion of the first connecting rod in the Y-axis direction.

20. The key structure of claim 19, wherein: the first Y-axis rod is positioned on the X-axis negative direction side of the third Z-axis arm, the second Y-axis rod is positioned on the X-axis positive direction side of the fourth Z-axis arm, and the third Z-axis arm and the fourth Z-axis arm jointly limit the movement range of the connecting rod on the X axis; or,

21. The key structure of claim 19, wherein: the bottom plate is also provided with a fifth positioning part, a sixth positioning part and a second stopping part, the key structure also comprises a second connecting rod, the second stopping part is positioned between the first positioning part and the second positioning part in the X-axis direction,

22. The key structure of claim 21, wherein: the third Y-axis lever is located on the negative X-axis side of the fifth Z-axis arm, the fourth Y-axis lever is located on the positive X-axis side of the sixth Z-axis arm, and the fifth Z-axis arm and the sixth Z-axis arm jointly limit the range of motion of the second connecting rod on the X-axis; or,

23. The key structure of claim 21, wherein: the first stopping portion and the second stopping portion are both located in an area surrounded by the first connecting rod and the second connecting rod.

24. A method of assembling a key structure according to claim 19 or 21, comprising the steps of:

25. The method of assembling a key structure of claim 24, wherein: in step (2), the first Y-axis rod is located on the negative X-axis side of the third Z-axis arm, and the second Y-axis rod is located on the positive X-axis side of the fourth Z-axis arm; or

26. The method of assembling a key structure of claim 24, wherein: in the step (1), the first connecting rod is kept in a second state, and in the second state, the first X-axis rod and the second X-axis rod are closer to the bottom plate than the first central rod, so that the first connecting rod is firstly lowered onto the bottom plate body; in step (2), the first center rod is lowered onto the bottom plate body toward the Y-axis negative direction.

27. The method of assembling a key structure of claim 24, wherein: in the case where the second connecting rod is included,