Stable balance frame assembly

Abstract

The present application discloses a stable balance frame assembly, comprising a base (1), a first balance rod (2) movably connected to the base (1), a second balance rod (3) movably connected to the base (1), and at least one elastic member (4) connected between the first balance rod (2) and the second balance rod (3). When downward pressing is performed, under the elastic pulling action of the elastic member (4), the first balance rod (2) and the second balance rod (3) respectively swing up and down in a balanced manner by taking the base (1) as a support point. The balance frame assembly further comprises at least one upswing limiting structure (5) used for limiting the upswing height of the first balance rod (2) and the second balance rod (3). According to the balance frame assembly, the upswing height of the first balance rod (2) and the second balance rod (3) can be limited, thereby ensuring the structural stability of the balance frame assembly, facilitating stable swing of the balance frame assembly, improving user experience, and facilitating assembling.

Description

A stable gimbal assembly Technical Field

[0001] The utility model relates to the technical field of key switches, in particular to a stable balancing frame assembly. Background Art

[0002] In the existing key switch, in order to improve the pressing balance, a balance frame structure is added inside the key switch, and the conduction and disconnection performance of the key switch are realized by the downward swing and upward swing of the balance frame structure. The existing balance frame structure usually has two balance bars, and the two balance bars are hinged at the ends, which is conducive to the synchronous swing of the two balance bars, thereby realizing the balanced swing of the balance frame structure. Since the balance frame structure adopts the method of hingedly connecting two balance frames to each other, during use or assembly, when the upward or downward swing range of the balance frame structure is too large, the balance frame structure is prone to fall off and lose balance. The stability of the balance frame structure is poor, which affects the user experience and is difficult to assemble.

[0003] Utility Model Content

[0004] In response to the above-mentioned shortcomings, the purpose of the present invention is to provide a stable balancing frame assembly, which can limit the upper swing height of the first balancing pole and the second balancing pole, ensure the stability of the balancing frame assembly structure, facilitate the smooth swing of the balancing frame assembly, improve the user experience, and facilitate assembly.

[0005] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a stable balance frame assembly, including a base, a first balance bar movably connected to the base, a second balance bar movably connected to the base, and at least one elastic member connected between the first balance bar and the second balance bar. When pressed downward, the first balance bar and the second balance bar swing up and down in a balanced manner with the base as the support point under the elastic pulling action of the elastic member. The balance frame assembly also includes at least one upper swing limit structure for limiting the upper swing height of the first balance bar and the second balance bar.

[0006] As a further improvement of the present invention, the upper swing limit structure includes an upper swing limit rod arranged between the first balance rod and the second balance rod, one end of the upper swing limit rod abuts against the upper end surface of the first balance rod, and the other end of the upper swing limit rod abuts against the upper end surface of the second balance rod.

[0007] As a further improvement of the present invention, the upper swing limiting structure further includes a longitudinal support plate connected to the upper swing limiting rod, and the longitudinal support plate extends downward and is connected to the base plate to form an integral structure.

[0008] As a further improvement of the present invention, the upper swing limiting structure includes two structures respectively formed on both sides of the base.

[0009] As a further improvement of the present invention, a first supporting protrusion is formed on both sides of the first balance pole, and a first supporting groove for the first supporting protrusion to be movably inserted is formed on both side edges of the base, and the first supporting protrusion is movably inserted into the first supporting groove to form a support point of the first balance pole on the base; a second supporting protrusion is formed on both sides of the second balance pole, and a second supporting groove for the second supporting protrusion to be movably inserted is formed on both side edges of the base, and the second supporting protrusion is movably inserted into the second supporting groove to form a support point of the second balance pole on the base; a first inward convex limiting portion is formed at the opening of the first supporting groove and the opening of the second supporting groove.

[0010] As a further improvement of the present invention, the first balance bar has two first limit abutting ends, and the two first limit abutting ends respectively abut on at least one of the base and the PCB board; the second balance bar has two second limit abutting ends, and the two second limit abutting ends respectively abut on at least one of the base and the PCB board.

[0011] As a further improvement of the present invention, a limiting abutting block for abutting the first limiting abutting end and / or the second limiting abutting end is respectively provided on the two inner sides of the base.

[0012] As a further improvement of the present invention, the first balance bar includes a first transverse balance bar, a first left support bar connected to one end of the first transverse balance bar, and a first right support bar connected to the other end of the first transverse balance bar, wherein the first support protrusions are respectively formed on the outer sides of the first left support bar and the first right support bar; the second balance bar includes a second transverse balance bar, a second left support bar connected to one end of the second transverse balance bar, and a second right support bar connected to the other end of the second transverse balance bar, wherein the second support protrusions are respectively formed on the outer sides of the second left support bar and the second right support bar.

[0013] As a further improvement of the present invention, a first connecting block is formed on the inner side of the end portion of the first left support bar, and a second clamping jaw is provided at the end portion of the second left support bar, and a second clamping jaw has a second clamping jaw opening for the first connecting block to be movably clamped into; a second connecting block is formed on the inner side of the end portion of the second right support bar, and a first clamping jaw is provided at the end portion of the first right support bar, and a first clamping jaw has a first clamping jaw opening for the second connecting block to be movably clamped into; at least one second inward convex limiting portion is formed at the opening of the first clamping jaw opening and the opening of the second clamping jaw opening respectively.

[0014] As a further improvement of the present invention, a connecting hole is respectively provided on the first transverse balance bar and the second transverse balance bar, one end of the elastic member is connected to the connecting hole of the first transverse balance bar, and the other end is connected to the connecting hole of the second transverse balance bar.

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

[0016] The balancing frame assembly is provided with an upper swing limit structure to limit the upper swing height of the first balance bar and the second balance bar to prevent the elastic member 4 from being over-compressed and easily damaged or the first balance bar 2 and the second balance bar 3 from falling off, thereby ensuring the stability of the balancing frame assembly structure, facilitating the smooth swing of the balancing frame assembly, improving user experience, and facilitating assembly.

[0017] The above is an overview of the technical solution of the utility model. The utility model will be further explained below in conjunction with the accompanying drawings and specific implementation methods.

[0018] BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 is an exploded view of the present invention;

[0021] FIG3 is a schematic structural diagram of the first balancing bar in the present invention;

[0022] FIG4 is a schematic structural diagram of the second balancing rod in the present invention;

[0023] Figure 5 is a schematic structural diagram of the base in the utility model;

[0024] FIG6 is a schematic diagram of the structure of the base and the first balance bar arranged on the PCB board in the present invention;

[0025] FIG7 is a cross-sectional view of the balance frame assembly of the present invention in a free state without being pressed;

[0026] FIG8 is a cross-sectional view of the balance frame assembly of the present invention in a pressed state.

[0027] DETAILED DESCRIPTION

[0028] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0029] Referring to Figures 1 to 4, an embodiment of the present invention provides a stable gimbal assembly comprising a base 1, a first gimbal 2 movably connected to the base 1, a second gimbal 3 movably connected to the base, and at least one elastic member 4 connected between the first gimbal 2 and the second gimbal 3. When pressed downward, the first gimbal 2 and the second gimbal 3, under the elastic pull of the elastic member 4, swing upward and downward in a balanced manner, respectively, with the base 1 as the support point. Specifically, the point at which the first gimbal 2 and the base 1 are movably connected serves as the support point for the first gimbal 2 on the base 1, and the point at which the second gimbal 3 and the base 1 are movably connected serves as the support point for the second gimbal 3 on the base 1. In this embodiment, the gimbal assembly further comprises at least one upward swing limiter 5 for limiting the upward swing height of the first and second gimbal 2 and 3. This prevents the elastic member 4 from being over-compressed and easily damaged, or the first and second gimbal 2 and 3 from falling off, thereby ensuring the structural stability of the gimbal assembly, facilitating smooth gimbal swing, improving user experience, and facilitating assembly.

[0030] Specifically, when the first and second balance bars 2 and 3 are pressed downward, they are initially moved downward due to the downward force exerted on them and the elastic pull of the elastic member 4. At the moment they reach the height of their support points and continue to move downward beyond the support points, the support points of the first and second balance bars 2 and 3 on the base 1 exert upward forces, i.e., upward arching forces, causing the portions of the first and second balance bars 2 and 3 away from the support points to move downward naturally. This upward arching force causes the first and second balance bars 2 and 3 to swing downward, achieving a balanced downward swing of the first and second balance bars 2 and 3, as shown in Figures 7 and 8 , transitioning from an unpressed state to a pressed state. During the pressing process, the upward swing limiting structure 5 does not restrict the downward movement of the first and second balance bars 2 and 3. At the moment the first and second balance bars 2 and 3 move downward below the height of their support points, a sense of pause, i.e., feedback, is provided to the user, thereby enhancing the pressing feel.

[0031] During the entire process, the elastic member 4 is deformed due to being stretched. When the pressure on the first balance bar 2 and the second balance bar 3 is released, the first balance bar 2 and the second balance bar 3 move upward and reset under the elastic restoring force of the elastic member 4, that is, the first balance bar 2 and the second balance bar 3 are pulled upward by the elastic restoring force, as shown in Figure 7. During this process, when the first balance bar 2 and the second balance bar 3 move up to the height of the support point and continue to move up beyond the support point, the first balance bar 2 and the second balance bar 3 continue to move up due to the continued upward elastic force, until the upper swing limit structure 5 exerts a force on the first balance bar 2 and the second balance bar 3 and limits the first balance bar 2 and the second balance bar 3 from continuing to move up, and the upward reset is completed. Due to the limiting effect of the upper swing limit structure 5, the first balance bar 2 and the second balance bar 3 move up to the initial position and stop swinging, thereby preventing the first balance bar 2 and the second balance bar 3 from continuing to move up due to inertia, causing the elastic member 4 to be over-compressed and easily damaged, or the first balance bar 2 and the second balance bar 3 to fall off and lose balance, thereby ensuring the stability of the balance frame assembly structure, facilitating the smooth swing of the balance frame assembly, and improving user experience.

[0032] To facilitate pressing the first and second balance bars 2 and 3, a keycap 7 is typically installed on the balance frame assembly, as shown in Figures 7 and 8. Due to the balanced swinging action of the first and second balance bars 2 and 3, the keycap 7 can be smoothly moved downward regardless of the position of the keycap 7. During assembly of the balance frame assembly of this embodiment, the keycap 7 sometimes needs to be removed. During the entire process of removing the keycap 7, an upward pulling force is generated on the first and second balance bars 2 and 3. However, due to the restriction of the upward swing limiting structure 5, the first and second balance bars 2 and 3 cannot move upward when subjected to the upward pulling force. This prevents the elastic member 4 from being over-compressed and easily damaged, or the first and second balance bars 2 and 3 from falling off, thereby ensuring the structural stability of the balance frame assembly and facilitating assembly.

[0033] It can be seen that the balancing frame assembly of this embodiment, since the upper swing limit structure 5 is provided, limits the upward movement position of the first balance bar 2 and the second balance bar 3, and the elastic member 4 will not be over-compressed and easily damaged, nor will the first balance bar 2 and the second balance bar 3 fall off due to excessive upward swing range. The stability of the balancing frame assembly structure is ensured, which is conducive to the smooth swing of the balancing frame assembly, improves the user experience, and is easy to assemble.

[0034] This embodiment specifically discloses an upward swing limiting structure 5. Specifically, as shown in FIG1 , the upward swing limiting structure 5 includes an upward swing limiting rod 51 disposed between the first balance bar 2 and the second balance bar 3. One end of the upward swing limiting rod 51 abuts against the upper end surface of the first balance bar 2, and the other end of the upward swing limiting rod 51 abuts against the upper end surface of the second balance bar 3. In other words, the upward swing limiting structure 5 blocks the upward movement of the first balance bar 2 and the second balance bar 3 via the upward swing limiting rod 51, thereby limiting the upward swing height of the first balance bar 2 and the second balance bar 3.

[0035] Specifically, as shown in Figures 5 and 6 , the upward swing limiting structure 5 further includes a longitudinal support plate 52 connected to the upward swing limiting rod 51. The longitudinal support plate 52 extends downward and is integrally connected to the base plate 1. In other words, the upward swing limiting structure 5 is fixedly connected to the base 1, effectively preventing the upward movement of the first and second balance bars 2 and 3.

[0036] Specifically, the upward swing limiting structure 5 includes two structures formed on both sides of the base 1. The two sides of the first balance bar 2 and the second balance bar 3 can be limited at the same time, which is beneficial to the balance of the balance frame assembly when it moves upward and resets.

[0037] As for the specific connection method between the first balance pole 2 and the base 1, as shown in Figures 1, 3 and 5, in this embodiment, a first supporting protrusion 21 is formed on both sides of the first balance pole 2, and a first supporting groove 11 for the first supporting protrusion 21 to be movably engaged is formed on both sides of the base 1. The first supporting protrusion 21 is movably engaged in the first supporting groove 11 to form a support point of the first balance pole 2 on the base 1, and the first balance pole 2 swings up and down at this support point; as for the specific connection method between the second balance pole 3 and the base 1, as shown in Figures 1, 4 and 5, in this embodiment, a second supporting protrusion 31 is formed on both sides of the second balance pole 3, and a second supporting groove 12 for the second supporting protrusion 31 to be movably engaged is formed on both sides of the base 1. The second supporting protrusion 31 is movably engaged in the second supporting groove 12 to form a support point of the second balance pole 3 on the base 1, and the second balance pole 3 swings up and down at this support point.

[0038] Specifically, the first supporting slot 11 and the second supporting slot 12 are formed on the longitudinal supporting plate 52 of the swing limiting structure 5 to ensure the swing stability of the balance frame assembly. At the same time, the entire balance frame assembly has a compact structure and good stability.

[0039] In order to prevent the first support protrusion 21 from falling out of the first support slot 11 and the second support protrusion 31 from falling out of the second support slot 12 during the swinging of the first balance bar 2 and the second balance bar 3, as shown in FIG5 , a first inner convex limiting portion (111, 121) is formed at the opening of the first support slot 11 and the opening of the second support slot 12, respectively. The first inner convex limiting portion (111, 121) limits the first support protrusion 21 and the second support protrusion 31, so that the first support protrusion 21 and the second support protrusion 31 will not fall out or shift while moving in the first support slot 11 and the second support slot 12, respectively. As a result, the first balance bar 2 and the second balance bar 3 can always swing at the support point on the base 1, improving the stability of the up and down swinging of the first balance bar 2 and the second balance bar 3 while also providing a sense of feedback, thereby improving the pressing feel.

[0040] During the up and down swinging of the first and second balance bars 2 and 3, in order to further limit their swinging strokes, as shown in Figures 3 and 4, the first balance bar 2 has two first position-limiting abutting ends 22, each of which abuts against at least one of the base 1 and the PCB board 6. In other words, the two first position-limiting abutting ends 22 of the first balance bar 2 can both abut against the base 1 or the PCB board 6, or one of the two first position-limiting abutting ends 22 abuts against the base 1 and the other abuts against the PCB board 6, as shown in Figure 6. Simultaneously, the second balance bar 3 has two second position-limiting abutting ends 32, each of which abuts against at least one of the base 1 and the PCB board 6. Similarly, the two second limit abutting ends 32 of the second balance bar 3 can both abut on the base 1, or both abut on the PCB board 6, or one of the two second limit abutting ends 32 abuts on the base 1 and the other abuts on the PCB board 6.

[0041] Correspondingly, as shown in FIG6 , a limiting abutting block 13 for abutting the first limiting abutting end 22 and / or the second limiting abutting end 32 is respectively provided on the two inner sides of the base 1 .

[0042] Regardless of the abutment method, as long as the two first limiting abutment ends 22 of the first balance bar 2 and the two second limiting abutment ends 32 of the second balance bar 3 are able to be limited, it is sufficient to prevent the first balance bar 2 and the second balance bar 3 from swinging too far when the elastic member 4 elastically pulls the first balance bar 2 and the second balance bar 3, or even the first balance bar 2 from swinging toward the second balance bar 3, or the second balance bar 3 from swinging toward the first balance bar 2. This ensures that the first balance bar 2 and the second balance bar 3 can swing within a certain range, with an accurate swing stroke, and improves the stability of their swing.

[0043] In this embodiment, as shown in Figure 3, the first balance bar 2 includes a first transverse balance bar 23, a first left support bar 24 connected to one end of the first transverse balance bar 23, and a first right support bar 25 connected to the other end of the first transverse balance bar 23. First support protrusions 21 are formed on the outer sides of the first left support bar 24 and the first right support bar 25. Furthermore, two first position-limiting abutment ends 22 of the first balance bar 2 are formed at the ends of the first left support bar 24 and the first right support bar 25, respectively. The first balance bar 2 is generally U-shaped.

[0044] In this embodiment, as shown in Figure 4 , the second balance bar 3 includes a second transverse balance bar 33, a second left support bar 34 connected to one end of the second transverse balance bar 33, and a second right support bar 35 connected to the other end of the second transverse balance bar 33. Second support protrusions 31 are formed on the outer sides of the second left support bar 34 and the second right support bar 35, respectively. Furthermore, two second position-limiting abutment ends 32 of the second balance bar 3 are formed at the ends of the second left support bar 34 and the second right support bar 35, respectively. The second balance bar 3 is generally U-shaped.

[0045] Regarding the connection between the first balance bar 2 and the second balance bar 3, as shown in Figures 1, 3 and 4, in this embodiment, a first connecting block 241 is formed on the inner side of the end of the first left support bar 24, and a second clamping claw 341 is provided at the end of the second left support bar 34. The second clamping claw 341 has a second clamping claw opening 3411 for the first connecting block 241 to be movably engaged. The engagement between the first connecting block 241 and the second clamping claw 341 realizes the movable connection between the first left support bar 24 and the second left support bar 34. As a result, the first left support bar 24 and the second left support bar 34 will neither interfere with each other's swinging movement nor facilitate the synchronous swinging movement of the two. A second connecting block 351 is formed on the inner side of the end of the second right support bar 35, and a first clamping claw 251 is provided at the end of the first right support bar 25. The first clamping claw 251 has a first clamping claw opening 2511 for the second connecting block 351 to be movably clamped into. The second connecting block 351 is clamped with the first clamping claw 251 to realize the movable connection between the second right support bar 35 and the first right support bar 25. Therefore, the second right support bar 35 and the first right support bar 25 will neither interfere with each other's swinging action nor cause the two to swing synchronously.

[0046] By movably connecting the first balancing pole 2 and the second balancing pole 3, there is no interference with each other's swinging motion, and the two can swing synchronously to achieve the purpose of smooth swinging.

[0047] In order to prevent the first connecting block 241 from disengaging from the second clamping jaw 341 and the second connecting block 351 from disengaging from the first clamping jaw 251 during the swinging of the first balance pole 2 and the second balance pole 3, as shown in FIG3 and FIG4, at least one second inwardly convex limiting portion (25111, 34111) is formed at the opening of the first clamping jaw 2511 and the opening of the second clamping jaw 3411, respectively. The second inwardly convex limiting portion (25111, 34111) limits the first connecting block 241 and the second connecting block 351, so that the first connecting block 241 and the second connecting block 351 are within the second clamping jaw 3411 and the second connecting block 351 are movable within the first clamping jaw 2511 without dislodging or shifting, thereby improving the stability of the up and down swinging of the first balance pole 2 and the second balance pole 3.

[0048] Regarding the connection between the elastic member 4, the first balance bar 2, and the second balance bar 3, in this embodiment, a connection hole (231, 331) is defined on each of the first and second transverse balance bars 23, 33. One end of the elastic member 4 is connected to the connection hole 231 of the first transverse balance bar 23, and the other end is connected to the connection hole 331 of the second transverse balance bar 33. Specifically, the elastic member 4 in this embodiment is a tension spring. Because one end of the tension spring is connected to the connection hole 231 of the first transverse balance bar 23, and the other end is connected to the connection hole 331 of the second transverse balance bar 33, when the first and second balance bars 2 and 3 are pressed downward, the tension spring is stretched and deformed. When the pressure on the first and second balance bars 2 and 3 is released, the first and second balance bars 2 and 3 can move upward and return to their original position due to the elastic restoring force of the tension spring.

[0049] The balance frame assembly of this embodiment can be applied to a key switch. During installation or removal of the keycap 7, or during use, the first balance bar 2 and the second balance bar 3 will not swing excessively downward or upward, effectively preventing the elastic member 4 from being excessively stretched or compressed, which could easily cause damage, or the first balance bar 2 and the second balance bar 3 from falling off. The balance frame assembly has good swing stability and excellent overall structural stability.

[0050] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, other structures obtained by adopting the same or similar technical features as the above embodiments of the present invention are within the scope of protection of the present invention.

Claims

1. A stable balancing frame assembly, comprising a base, a first balancing pole movably connected to the base, a second balancing pole movably connected to the base, and at least one elastic member connected between the first balancing pole and the second balancing pole, wherein when pressed downward, the first balancing pole and the second balancing pole are pulled elastically by the elastic member to swing up and down in a balanced manner with the base as a support point, respectively, wherein: It also includes at least one upper swing limiting structure for limiting the upper swing height of the first balance pole and the second balance pole.

2. The stable gimbal assembly according to claim 1, characterized in that: The upper swing limiting structure includes an upper swing limiting rod arranged between the first balance rod and the second balance rod, one end of the upper swing limiting rod abuts against the upper end surface of the first balance rod, and the other end of the upper swing limiting rod abuts against the upper end surface of the second balance rod.

3. The stable gimbal assembly according to claim 2, characterized in that: The upper swing limiting structure also includes a longitudinal support plate connected to the upper swing limiting rod, and the longitudinal support plate extends downward and is connected to the base plate to form an integral structure.

4. The stable gimbal assembly according to claim 3, characterized in that: The upper swing limiting structure includes two structures which are respectively formed on two side edges of the base.

5. The stable gimbal assembly according to claim 1, characterized in that: A first supporting protrusion is formed on both sides of the first balance pole, and a first supporting groove for the first supporting protrusion to be movably inserted is formed on both side edges of the base, and the first supporting protrusion is movably inserted into the first supporting groove to form a supporting point of the first balance pole on the base; a second supporting protrusion is formed on both sides of the second balance pole, and a second supporting groove for the second supporting protrusion to be movably inserted is formed on both side edges of the base, and the second supporting protrusion is movably inserted into the second supporting groove to form a supporting point of the second balance pole on the base; a first inner convex limiting portion is formed at the opening of the first supporting groove and the opening of the second supporting groove.

6. A stable gimbal assembly according to any one of claims 1 to 5, characterized in that: The first balance bar has two first limit abutting ends, which respectively abut on at least one of the base and the PCB board; the second balance bar has two second limit abutting ends, which respectively abut on at least one of the base and the PCB board.

7. The stable gimbal assembly according to claim 6, characterized in that: A limiting abutting block for abutting the first limiting abutting end and / or the second limiting abutting end is respectively arranged on the two inner side edges of the base.

8. The stable gimbal assembly according to claim 5, characterized in that: The first balance bar includes a first transverse balance bar, a first left support bar connected to one end of the first transverse balance bar, and a first right support bar connected to the other end of the first transverse balance bar, wherein the first support protrusions are respectively formed on the outer sides of the first left support bar and the first right support bar; the second balance bar includes a second transverse balance bar, a second left support bar connected to one end of the second transverse balance bar, and a second right support bar connected to the other end of the second transverse balance bar, wherein the second support protrusions are respectively formed on the outer sides of the second left support bar and the second right support bar.

9. The stable gimbal assembly according to claim 8, characterized in that: A first connecting block is formed on the inner side of the end of the first left support bar, and a second clamping jaw is provided at the end of the second left support bar, and a second clamping jaw has a second clamping jaw opening for the first connecting block to be movably clamped in; a second connecting block is formed on the inner side of the end of the second right support bar, and a first clamping jaw is provided at the end of the first right support bar, and a first clamping jaw has a first clamping jaw opening for the second connecting block to be movably clamped in; at least one second inner convex limiting portion is formed at the opening of the first clamping jaw opening and the opening of the second clamping jaw opening, respectively.

10. The stable gimbal assembly according to claim 8, characterized in that: A connecting hole is respectively provided on the first transverse balance bar and the second transverse balance bar. One end of the elastic member is connected to the connecting hole of the first transverse balance bar, and the other end is connected to the connecting hole of the second transverse balance bar.

Images