TWM611911U - Mouse structure capable of adjusting actuating force of scroll roller - Google Patents

Abstract

This creation is a mouse structure that can adjust the scroll wheel as a power path. It includes a housing, a circuit board, a support base, a roller module and a gasket. The housing is provided with a roller opening, and the circuit board is arranged on In the housing, a micro switch is arranged on it, and the micro switch is electrically connected to the circuit board. One end of the support base is pivotally connected to the housing, and the other end extends to the top side of the micro switch. The roller mold The assembly is pivotally connected to the support base, a local area of which is exposed from the opening of the roller to the outside of the housing, the gasket is arranged between the support base and the micro switch, in a state where the roller module is pressed downward The roller module drives the other end of the support base to move downwards, so that the washer is squeezed and deformed by the support base, and at the same time, the washer generates a restoring force to force the support base to move upwards. In this way, the mouse The structure can prevent the micro switch from being accidentally touched by the excessive force of the toggle.

Description

Mouse structure capable of adjusting scroll wheel as power path

This creation is about the mouse structure, especially a mouse structure that can prevent the user from touching the micro switch by mistake by turning the scroll wheel with too much force.

According to the development of science and technology, the penetration rate of computers is getting higher and higher, and most of the work and entertainment are closely related to computers. Among them, the mouse is an indispensable important accessory when people operate the computer, the basic structure of the mouse. In addition to a sensor at the bottom (such as a traditional sensing mechanism consisting of a rolling ball and a rotating shaft, or an optical recognition mechanism popular in recent years... etc.), there are two buttons on the top for the user to change the computer. Position the cursor on the screen and input the corresponding command. In addition, there is usually a scroll wheel on the mouse, so that the user can intuitively and conveniently control the computer (such as scrolling animation) by turning the scroll wheel. .

For office workers who need to use the computer for a long time, or gaming game players, in addition to focusing on the feel of pressing the buttons, the scroll wheel is also the most commonly used component of computer users, for example, using the scroll wheel to browse the web or use the cursor The movement of the mouse, or the use of pressing the scroll wheel to output signals to switch between different function modes. Therefore, the feel of the mouse button pressing and the sensitivity of the scroll wheel after being moved are usually the key to the user's choice of the mouse However, when the user quickly flicks the mouse wheel to rotate the mouse wheel, it is easy to cause incorrect messages due to improper force. Therefore, how to effectively solve the aforementioned problems to satisfy consumers’ demand for electronic products The request is an important subject that this creation is desperately trying to solve here.

In order to stand out in the fiercely competitive market, the creators rely on years of professional and rich practical experience and uphold the research spirit of excellence. After a long period of hard research and experimentation, they finally developed an adjustable roller for this creation. The mouse structure of the power road, with the advent of this creation, can provide users with a better experience.

One purpose of this creation is to provide a mouse structure capable of adjusting the scroll wheel as a power path, which includes a shell, a circuit board, a support base, a wheel module and a gasket, wherein the shell is provided with an accommodating space , A roller opening is opened on the accommodating space, and the accommodating space is communicated with the roller opening, the circuit board is arranged in the accommodating space, and a micro switch is arranged on it, and the micro switch is electrically connected with the circuit on the circuit board, The supporting base is located in the containing space, one end of which can be pivotally connected to the housing, and the other end of the supporting base can be extended to the top side of the micro switch. The supporting base can rotate with its one end as the axis, so that the other One end can move up and down, the roller module is pivotally connected to the support base, and its partial area can be exposed from the roller opening to the outside of the shell, and can be rotated by force or be pressed downwards. The washer is arranged on Between the support base and the micro switch, when the roller module is pressed downward, the roller module can drive the other end of the support base to move downward, so that the gasket is squeezed by the support base The deformation causes the micro switch to be touched by the support base and/or the gasket; when the roller module is no longer pressed downward, the gasket will generate a restoring force to force the support base to move upward , So that the micro switch is no longer touched by the support base and/or the gasket. Therefore, since the force of the user to move the roller module must be greater than the force generated by the gasket’s own elastic restoring force, the The scroll wheel module can avoid accidentally touching the button due to excessive force being toggled, and generating an error signal.

Preferably, the middle part of the bottom end of the gasket presents an upwardly concave configuration, and a key of the micro switch can be accommodated in the aforementioned concave configuration. In this way, when the roller module is not pressed, the pad does not touch the button.

Preferably, the washer is fixed on the support base, so that when the roller module is pressed downward, the roller module can drive the other end of the support base to move downward, so that the cushion The sheet is squeezed and deformed by the support base, so that the micro switch is touched and pressed by the support base and/or the gasket.

Preferably, the spacer is fixed on the surface of the micro switch, so that when the roller module is pressed downward, the roller module can drive the other end of the support base to move downward, so that The gasket is deformed by being squeezed by the supporting base, so that the micro switch is pressed by the supporting base and/or the gasket.

Preferably, opposite sides of one end of the support seat are respectively provided with a fixed shaft outwardly, a base of the housing is provided with two first pivot holes, and each fixed shaft can respectively extend into each of the first pivots. In the connecting hole, so that the support base can be pivotally connected to the base. In this way, the supporting base and the base can be pivotally connected to each other by the matching of the fixing shafts and the first pivoting holes.

Preferably, the top side of the other end of the support seat is provided with a first groove, and the mouse structure further includes a cover and a first elastic element, wherein the cover system is arranged in the housing, and At least a partial area can be located above the top surface of the first groove, and the first elastic element is located between the first groove and the cover. In this way, the first elastic element can be used to oppose the vibration generated when the mouse structure is pressed.

Preferably, both sides of the support base are respectively provided with a second pivot hole, the roller module is provided with a pivot shaft, both ends of the pivot shaft can respectively extend into each of the second pivot holes, so that The roller module can be pivotally connected to the support base. In this way, the roller module and the support base can be pivotally connected to each other by the matching of the pivot shaft and the second pivot holes.

Preferably, the roller module includes a roller and a roller frame, wherein an annular space is provided in the roller, the pivot shaft is located in the annular space, and the roller is pivotally connected to the support seat by the pivot shaft, The roller frame is sleeved on the roller, and a partial area of the roller frame can be exposed out of the shell from the opening of the roller. In this way, the user can move the wheel frame to operate the wheel module.

Preferably, the roller module further includes an assembly piece, a push piece, at least one second elastic element, and a ball, wherein the assembly piece has a through hole on opposite sides thereof, and the assembly piece can extend into the annular space , So that the pivot shaft can pass through the through hole, so that the assembly piece is pivotally connected to the roller, the top side of the assembly piece is recessed with at least one assembly space, and the top side of the push piece is provided with a second recess Groove, the second elastic element is located between the assembly part and the push part, the force generated by it can displace the push part in a direction away from the assembly part, and the ball is arranged in the second groove . In this way, the force indirectly applied to the sphere by the second elastic element can reliably and stably allow the roller module to stay on the scale dialed by the user.

Preferably, the inner surface of the roller is recessed with a plurality of grooves, and a tooth-like part is formed between two adjacent grooves, and the grooves and the tooth-like part can be exposed in the annular space. Together with the state in which the second elastic element, the pusher and the ball are assembled into the roller, the ball is indirectly affected by the force of the second elastic element and presses against one of the grooves. In this way, the user can feel the paragraph touch when operating the scroll wheel module to rotate.

In order to facilitate your reviewer to have a further understanding and understanding of the purpose, technical features and effects of this creation, the following examples are provided in conjunction with the diagrams. The detailed description is as follows:

This creation is a mouse structure that can adjust the power of the scroll wheel. Among them, this creation is mainly designed for the related structure of the scroll wheel module 14. Therefore, in the following description, the left button 101 and the right button of the mouse structure 1 will not be related. The related mechanism of the button 102 will be described. The aforementioned left/right buttons 101, 102 can use the existing mouse button structure (for example, the left/right buttons 101, 102 can respectively touch the corresponding micro switches after being pressed). For the convenience of description, the subsequent embodiments use the top side (upper) position of the element as the top side (upper) position of the element in Figure 1, the bottom side (lower) position of the element as the bottom side of Figure 1 and the upper left side of Figure 1 as the front side position of the element. Take the bottom right of the first figure as the back position of the component. Please refer to Figures 1 and 2. In an embodiment of this creation, the mouse structure 1 includes a housing 11, a circuit board 12, a support base 13, and a roller module 14, wherein the housing The body 11 is provided with an accommodating space to accommodate the components required by the mouse structure 1 during normal operation.

Continuing, please refer to Figures 1 and 2. The housing 11 can at least be composed of a base 111 and an outer cover 112, wherein the circuit board 12, the support base 13 and the roller module 14 can be arranged on On the base 111, the outer cover 112 is provided with a roller opening 1121. The roller opening 1121 communicates with the accommodating space. The outer cover 112 can cover the top side of the base 111 to cover the circuit board 12 and the The supporting seat 13 is supported, and a partial area of the roller module 14 can expose the roller opening 1121 to the outside. In addition, one end (front end) of the support base 13 will be pivotally connected to the base 111, and the other end (rear end) of the support base 13 will extend toward the rear of the base 111, and the support base 13 can have one end as its axis. Rotate so that the other end can move up and down. Please refer to Figures 2 and 3, in this embodiment, a fixed shaft 131 is protruding outward from opposite sides of one end of the support base 13, and one end (front end) of the base 111 is provided with two first pivots. Holes 1111, each of the fixed shafts 131 can respectively extend into each of the first pivot holes 1111, so that the support base 13 can be pivotally connected to the base 111, that is, the support base 13 can use its front end as a support point , The rear end can move up and down freely. Also, please refer to Figure 3, the circuit board 12 is provided with a micro switch 15 which will form an electrical connection with the circuit of the circuit board 12, and the micro switch 15 will correspond to the support base 13 another side.

Furthermore, please refer to FIGS. 1 to 3 again. The roller module 14 will be pivotally connected to the support base 13, and its partial area will be exposed from the roller opening 1121 to the outside of the cover 112, so that the roller The module 14 can be rotated by the user or pressed downward. In this embodiment, a second pivot hole 132 is opened on both sides of the support base 13, and the roller module 14 is provided with a pivot Rotation shaft 1421, both ends of the pivot shaft 1421 can respectively extend into each of the second pivot holes 132, so that the roller module 14 can be pivotally connected to the support base 13, that is, the roller module 14 can be The pivot shaft 1421 is pivoted and rotated as a supporting point. Moreover, when the roller module 14 is pressed downward by the user, the roller module 14 can drive the other end of the support base 13 to move downward, so as to directly or indirectly press the support base 13 to activate the micro switch 15 (Detailed later), so that the micro switch 15 can send the corresponding touch signal through the circuit on the circuit board 12.

When the user toggles the roller module 14, especially when the roller module 14 is quickly moved with a finger, the roller module 14 will bear part of the downward force. Therefore, in order to avoid the roller module 14 The micro switch 15 was accidentally touched due to the excessive force being toggled and an error signal was generated. This creation will place a spacer 16 between the support base 13 and the micro switch 15 (as shown in Figure 3) Among them, the gasket 16 is made of elastic material (such as: silicone) to have an elastic restoring force. When it is compressed and deformed by an external force, it will return to its original state due to the elastic restoring force when the external force is released. . Here is an explanation of the arrangement of the spacer 16, please refer to Figures 3 to 6. In this embodiment, the bottom side of the other end of the support base 13 is protruding downwards with a protruding member 135, the micro switch A button 151 is protruding upward on the top side of 15 and an opening is opened on the top side of the gasket 16 with a space in it. The opening will communicate with the space, and the protruding member 135 can extend into the space through the opening. In order to enable the washer 16 to be fixed to the protruding member 135 in an inserting manner, but not limited to this, in other embodiments of the present invention, the washer 16 can be fixed to the support base in other ways 13 on. Alternatively, the gasket 16 can be fixed on the surface of the micro switch 15 that does not correspond to the button 151 by adhesion or other means.

By the way, in this embodiment, the middle part of the bottom end of the gasket 16 will present an upwardly concave configuration, and its bottom end can abut against the top side of the micro switch 15 near the opposite sides, and the button 151 can correspond to the recessed configuration of the gasket 16 (as shown in Figure 4). When the gasket 16 is nested (embedded) on the protruding part 135, the length of the protruding part 135 can be adjacent and the same Or beyond the concave configuration of the spacer 16, when the roller module 14 is not pressed downward, the protrusion 135 will not press the button 151, but when the roller module 14 is pressed downward, and When the downward pressing force is greater than the elastic restoring force of the gasket 16, the roller module 14 can drive the other end of the support base 13 to move downward, so that the gasket 16 is squeezed and deformed by the support base 13. The bottom edge of the protrusion 135 and/or the partial bottom edge of the gasket 16 can touch the button 151, so that the micro switch 15 is pressed by the protrusion 135 and/or the gasket 16 to generate a signal. However, in other embodiments of the present invention, when the gasket 16 is fitted (embedded) on the protruding member 135, the length of the protruding member 135 can be shorter. Therefore, the key 151 is composed of the pad 16 only. When the roller module 14 is not pressed, the partial bottom edge of the pad 16 will not touch the button 151, but when the roller module 14 is pressed downwards, it is pressed downwards. When the force is greater than the elastic restoring force of the gasket 16, the roller module 14 can drive the other end of the support base 13 to move downward, so that the gasket 16 is squeezed and deformed by the support base 13, so that the gasket 16 is deformed. The part of the bottom edge can touch the button 151 so that the micro switch 15 is touched and pressed by the pad 16 to generate a signal.

In addition, in other embodiments of the present invention, the bottom side of the other end of the support base 13 may not have the protruding member 135 protruding, and the middle part of the bottom end of the spacer 16 will have an upwardly concave configuration to provide To accommodate the button 151, the bottom end of the gasket 16 adjacent to opposite sides can be adhesively fixed to the surface of the micro switch 15 that does not correspond to the button 151, when the wheel module 14 is not pressed , The bottom edge of the gasket 16 will not touch the button 151; but when the roller module 14 is pressed downward, the roller module 14 can drive the other end of the support 13 to move downward, so that The gasket 16 is deformed by being squeezed by the support base 13, so that a part of the bottom edge of the gasket 16 can touch the button 151, so that the micro switch 15 is touched and pressed by the gasket 16 to generate a signal.

Furthermore, when the roller module 14 is no longer pressed downwards, the gasket 16 will generate a restoring force to force the support base 13 to move upwards, so that the micro switch 15 is no longer subject to the protrusion 135. And/or the gasket 16 is pressed, so that although the user moves the roller module 14, part of the downward force is exerted on the roller module 14, but the aforementioned force is not sufficient to overcome the The elastic restoring force of the gasket 16 itself, therefore, when the user toggles the roller module 14, it can prevent the micro switch 15 from being activated by the roller module 14 by accident. In addition, when the user operates the mouse structure 1, the spacer 16 can also reduce the vibration generated after the scroll wheel module 14 is toggled or pressed, so that the mouse structure 1 can be operated more smoothly. .

Please refer to Figures 3 to 6, in this embodiment, the top side of the other end of the support base 13 is provided with a first groove 134, and a cover 18 is provided in the housing 11, at least A local area can be located above the top surface of the first groove 134 (to avoid the complexity of the drawings in Figures 5 and 6, the cover 18 is omitted in Figures 5 and 6), and the first groove 134 A fixing member 1341 is protrudingly provided. One end (bottom end) of a first elastic element 17 extends into and is fixed to the fixing member 1341, and the other end (top) abuts against the cover 18 so that the first elastic element 17 The elastic element 17 is received between the first groove 134 and the cover 18. When the user first presses the roller module 14 and then no longer presses the roller module 14, another part of the support base 13 One end will be affected by the restoring force of the gasket 16 and will move upward. Moreover, after the first elastic element 17 is compressed due to the upward displacement of the other end of the support base 13, its own elastic restoring force (That is, return to the position before deformation), the other end of the support 13 will be displaced downwards. In this way, the force of both the first elastic element 17 and the washer 16 can make the support The other end of the seat 13 remains stable and does not form an excessive shaking amplitude. Therefore, the vibration generated by the user pushing or pressing the roller module 14 will be affected by the first elastic element 17 and the gasket 16 The kinetic energy of the mouse structure 1 is more stable.

Please refer to Figures 2, 7 and 8. In this embodiment, the mouse structure 1 can follow the scroll wheel decoder of an existing mouse to determine the rotation range and direction of the scroll wheel module 14. When When the user toggles the roller module 14, the roller module 14 can use the roller decoder to determine its rotation speed, and then calculate the actual rotation amplitude, and confirm the rotation direction of the roller module 14, according to The determined rotation amplitude and rotation direction generate a scroll wheel operation signal. However, since the aforementioned features are not the focus of this creation, they will not be repeated. In addition, the roller module 14 includes a roller 142 and a roller frame 143. The roller 142 is provided with an annular space 1420. The inner surface of the roller 142 is recessed with a plurality of grooves 1422, and there is a gap between two adjacent grooves 1422. A toothed portion 1423 is formed respectively. The grooves 1422 and the toothed portion 1423 are exposed in the annular space 1420. The pivot shaft 1421 is located in the annular space 1420 so that the roller 142 can pass through the pivot shaft. 1421 and pivotally connected to the support base 13, the roller frame 143 is sleeved on the outside of the roller 142 and can be exposed outside the housing 11 so that the user's fingers can move the aforementioned exposed轮轮架143。 轮轮架143. In addition, the roller module 14 further includes an assembly 141, a pusher 144, at least one second elastic element 145, and a ball 146, wherein the assembly 141 has a through hole on two opposite sides (left and right sides) 1411, at least one assembly space 1412 is provided in the top recess, and the assembly 141 can extend into the annular space 1420, so that the pivot shaft 1421 can pass through the through hole 1411, so that the assembly 141 can be pivotally connected to The roller 142.

Continuing, please refer to Figures 2, 7 and 8, the second elastic element 145 can be located between the assembly part 141 and the pushing part 144. In this embodiment, the second elastic element 145 One end (bottom side) can extend into and abut against the inner bottom surface of the assembly space 1412, and the other end (top side) can be connected to the bottom surface of the pushing member 144, and the top side of the pushing member 144 is also provided with a first Two grooves 1440, the ball 146 can be set in the second groove 1440, when the assembly 141 together with the second elastic element 145, the push piece 144 and the ball 146 are assembled into the roller 142, the The pushing member 144 can be affected by the force of the second elastic element 145 and move away from the assembling member 141 so that the ball 146 can be positioned in one of the grooves 1422.

To illustrate the foregoing features in detail, please refer to Figures 2, 7 and 8. In this embodiment, in the state where the assembly 141 is assembled into the roller 142, the ball 146 can be indirectly received by the second The elastic force provided by the elastic element 145 is pressed against one of the grooves 1422. When the user pushes the roller module 14 with force, the aforementioned force can overcome the indirect application of the second elastic element 145 to the ball 146. The acting force enables the toothed portion 1423 adjacent to the aforementioned groove 1422 to push the ball 146 to retract (that is, the ball 146 moves toward the direction of the pivot axis 1421), until the ball 146 passes the current toothed portion 1423 Afterwards, it can be affected by the force of the second elastic element 145 and extend into another groove 1422, so that the user can feel the paragraph touch generated by the rotation when the roller module 14 is moved. For example, every time the scroll wheel module 14 rotates one scale, the user will feel a pause. In addition, when the user does not move the roller module 14 any more, the force applied by each toothed portion 1423 to the ball 146 will be less than the force applied by the second elastic element 145 to the ball 146 indirectly, Therefore, the ball 146 is pressed against the groove 1422 without being displaced. In this way, the roller module 14 can reliably and stably stay at the current position. In particular, the tooth-shaped part 1423 of this creation will adopt a cone shape. Therefore, when the roller module 14 is stopped from rotating, if the sphere 146 exactly corresponds to the tooth-shaped part 1423, because the sphere The contact area between 146 and the toothed portion 1423 is small. Therefore, the ball 146 is indirectly affected by the force of the second elastic element 145 and will slide into the groove 1422 to ensure that the ball 146 can Stay in the groove 1422 stably.

Press, the above is only the preferred embodiment of this creation. However, the scope of rights claimed in this creation is not limited to this. Anyone who is familiar with the art can use the technical content disclosed in this creation. Easily considered equivalent changes should fall within the scope of protection of this creation.

1: Mouse structure 101: Left button 102: Right button 11: shell 111: Base 1111: The first pivot hole 112: Outer cover 1121: Roller opening 12: Circuit board 13: Support seat 131: fixed shaft 132: second pivot hole 134: The first groove 1341: fixed parts 135: convex 14: Wheel module 141: Assembly 1411: Through hole 1412: assembly space 142: Wheel 1420: Annular Space 1421: pivot axis 1422: groove 1423: dentate 143: Wheel Frame 144: push piece 1440: second groove 145: second elastic element 146: Sphere 15: Micro switch 151: Button 16: Gasket 17: The first elastic element 18: Hood

[Figure 1] is a schematic diagram of the mouse structure of this creation; [Picture 2] is an exploded schematic diagram of the mouse structure of this creation; [Figure 3] An exploded schematic diagram of the mouse structure of this creation from another perspective; [Figure 4] is a schematic diagram of the spacers between the support base and the micro switch of this creation; [Figure 5] is a schematic diagram showing that the scroll wheel module of this creation is not pressed downward; [Figure 6] is a schematic diagram of the scroll wheel module of this creation being pressed downward to drive the support base to move downward, so that the micro switch is pressed by the support base and/or gasket; [Figure 7] is a schematic diagram of the sphere pressed in the groove of this creation; and [Figure 8] is a schematic diagram of the sphere moving away from the groove in this creation.

11: shell

12: Circuit board

13: Support seat

134: The first groove

1341: fixed parts

14: Wheel module

15: Micro switch

151: Button

16: Gasket

17: The first elastic element

Claims (10)

A mouse structure capable of adjusting the scroll wheel as a power path, including: A shell, in which there is an accommodating space, and a roller opening is opened on the housing, and the accommodating space is communicated with the roller opening; A circuit board is located in the accommodating space, the circuit board is provided with a micro switch, and the micro switch is electrically connected with the circuit on the circuit board; A support seat is located in the accommodating space, one end of which can be pivotally connected to the housing, and the other end can extend to the top side of the micro switch. The support seat can rotate with one end as the axis, so that it The other end can move up and down; A roller module is pivotally connected to the support base, a partial area of the roller module can be exposed from the roller opening to the outside of the casing, and can be rotated by force or be pressed downward; and A gasket is arranged between the support base and the micro switch; When the roller module is pressed downward, the roller module can drive the other end of the support base to move downward, so that the gasket is squeezed and deformed by the support base, so that the micro switch is subjected to the The support base and/or the washer is pressed; when the roller module is no longer pressed downward, the washer will generate a restoring force to force the support base to move upwards, so that the micro switch is no longer subject to the The support base and/or the gasket is touched. The mouse structure according to claim 1, wherein the middle part of the bottom end of the gasket is in an upwardly concave configuration, and one of the keys of the micro switch can be accommodated in the aforementioned concave configuration. The mouse structure according to claim 2, wherein the spacer is fixed on the support base. The mouse structure according to claim 2, wherein the gasket is fixed on the surface of the micro switch. The mouse structure according to claim 1, wherein a fixed shaft protrudes outward from opposite sides of one end of the support base, and a base of the housing is provided with two first pivot holes, each of the fixed shafts It can respectively extend into each of the first pivot holes, so that the support base can be pivotally connected to the base. The mouse structure according to claim 5, wherein the top side of the other end of the support base is provided with a first groove, and the mouse structure further includes: A cover, which is arranged in the shell, and at least a partial area of the cover can be located above the top surface of the first groove; and A first elastic element is located between the first groove and the cover. The mouse structure according to claim 6, wherein a second pivot hole is respectively opened on both sides of the support base, a pivot shaft is provided on the roller module, and both ends of the pivot shaft can respectively extend into each of the In the second pivot hole, the roller module can be pivotally connected to the support base. The mouse structure according to claim 7, wherein the scroll wheel module includes: A roller with an annular space therein, the pivot shaft is located in the annular space, and the roller is pivotally connected to the support seat by the pivot shaft; and A roller frame is sleeved on the roller, and a partial area of the roller frame can be exposed outside the shell from the opening of the roller. The mouse structure according to claim 8, wherein the scroll wheel module further includes: An assembling piece is provided with a through hole on opposite sides thereof, the assembling piece can extend into the annular space, so that the pivot shaft can pass through the through hole, so that the assembling piece is pivotally connected to the roller, the assembling piece The top side recess is provided with at least one assembly space; A pusher with a second groove on the top side; At least one second elastic element is located between the assembly and the pusher, and the force generated by it can displace the pusher in a direction away from the assembly; and A ball is set in the second groove. The mouse structure according to claim 9, wherein the inner surface of the roller is recessed with a plurality of grooves, and a tooth-like part is formed between two adjacent grooves, and the grooves and the tooth-like part can be exposed In the annular space, in the state in which the assembly piece together with the second elastic element, the push piece and the ball are assembled into the roller, the ball is indirectly affected by the force of the second elastic element and is pressed against In one of the grooves.

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