Balanced reset key mechanism

Abstract

The invention belongs to the technical field of printers, and particularly relates to a balance reset key mechanism which comprises a flip cover, key grooves are symmetrically formed in the two sides of the flip cover, limiting blocks are fixedly installed on the inner walls of the two sides of the flip cover, and it is ensured that a cover opening key and the limiting blocks of an inner frame of the flip cover form a balanced moving track through the flip cover; a balance limiting structure is additionally arranged on the turning cover, double reset tension springs are additionally arranged on the cover opening hook and the turning cover for resetting, a rotating shaft buckle is additionally arranged on the inner frame of the turning cover for positioning, the inner frame of the turning cover does not bounce upwards, and inward, upward, downward and outward inclined limiting mechanisms aiming at the cover opening key are additionally arranged on the inner frame of the turning cover and the turning cover. The uncovering key returns to the initial position along the corresponding track when being reset; in the using process of the whole machine, the appearance can be kept consistent, due to the fact that the moving track is stable, the cover opening and closing process is smoother, and the accidental key clamping phenomenon is avoided. And the cover opening key can be accurately reset by utilizing a balance track formed by the double reset tension springs, the turning cover and the turning cover inner frame.

Description

Technical Field

[0001] The invention belongs to the technical field of printers, and in particular relates to a balance reset button mechanism. Background Art

[0002] The balance reset button mechanism of a printer generally refers to a hardware or button mechanism used to restore the normal working state of the printer, especially when there is a printing jam, error or other failure, the user can press the reset button to restore the printer to normal operation. This button mechanism involves multiple mechanical, electronic and control systems inside the printer, and the specific implementation method varies depending on the printer model, type and technology.

[0003] Function of the Balance Reset Button: The main function of the Balance Reset Button is to restore the printer to normal working state and solve some problems caused by paper jams, malfunctions or other abnormal conditions. It can help: Reset the working state of the printer: For example, when the printer has an error or has not responded for a long time, pressing the reset button can restart the system.

[0004] Resolve printer paper jams or paper feed failures: Help the printer return to normal status by resetting, restarting the paper feed system, or clearing internal errors.

[0005] Resetting the printhead or mechanical parts: If the printhead is stuck or there is a problem with the paper feed mechanism, the reset button can sometimes realign these parts.

[0006] When the printer cover is opened or closed, the buttons cannot be normally reset to the initial position in a balanced manner, and tilting may occur, which seriously affects the appearance. In view of this, a balanced reset button mechanism is proposed. Summary of the invention

[0007] The object of the present invention is to provide a balanced reset button mechanism to solve the problems raised in the above background technology.

[0008] In view of this, the present invention provides a balanced reset button mechanism, comprising: A flip cover, wherein key slots are symmetrically provided on both sides of the flip cover, and limit blocks are fixedly installed on the inner walls of both sides of the flip cover, and a cover opening button is slidably installed in the key slot, and one end of the two cover opening buttons respectively passes through the two limit blocks, and two cover opening hooks are provided on the rear side of the two cover opening buttons and between the two cover opening buttons, a rotating shaft is provided between the two cover opening hooks, and a shaft buckle is fixedly installed on the front side of the rotating shaft, and a flip cover inner frame is provided on the front side of the shaft buckle and inside the cover opening button; Two reset springs, the two reset springs are respectively fixedly mounted on both sides of the flip cover inner frame, and the two ends of the two reset springs are respectively fixed to the two cover opening hooks; The flap inner frame limiting block is fixedly mounted on the inner wall of the flap.

[0009] In this technical solution, the cover opening button, cover opening hook, button slot, rotating shaft, reset tension spring, shaft buckle, limit block and flip cover inner frame limit block cooperate to ensure that the cover opening button forms a balanced running track through the flip cover and the flip cover inner frame limit block; By adding a balancing limit structure to the flip cover, adding double reset tension springs to the cover opening hook and the flip cover for reset, adding a rotating shaft buckle to the inner frame of the flip cover for positioning, it is ensured that the inner frame of the flip cover does not bounce upwards, and adding tilt limit mechanisms inward, upward, downward and outward for the cover opening button to the inner frame and the flip cover, so as to ensure that the cover opening button returns to the initial position along the corresponding trajectory when reset.

[0010] In the above technical solution, further, one end of the two cover opening buttons is slidably connected to the two limit blocks respectively, and the flip cover and the two limit blocks are an integrally formed structure.

[0011] In this technical solution, it is ensured that when a person presses the cover opening button, the two cover opening buttons can slide in the two limit blocks respectively; and the structural stability of the flip cover and the two limit blocks is ensured.

[0012] In the above technical solution, further, the rotating shaft is rotatably connected to the two cover opening hooks, and the cover opening button is slidably connected to the button slot.

[0013] In the present technical solution, when a person presses the two cover opening buttons and slides in the two button grooves respectively, the two cover opening buttons will respectively squeeze the two cover opening hooks to slide on the rotating shaft and release the pressure on the rotating shaft. Subsequently, the two cover opening hooks will pull the flip cover inner frame to flip through two reset springs respectively, and in the process of flipping the flip cover inner frame, the rotating shaft will be flipped by squeezing the shaft buckle.

[0014] In the above technical solution, further, the rotating shaft and the shaft buckle are an integrally formed structure, and the shaft buckle is in contact with the inner frame of the flip cover.

[0015] In this technical solution, the structural stability of the rotating shaft and the shaft buckle is ensured, so that when the two cover opening buttons are not pressed, the inner frame of the flip cover is squeezed by the shaft buckle to maintain structural stability.

[0016] In the above technical solution, further, one end of the reset tension spring is hung on the inner frame of the flip cover, and the other end is hung on the cover opening hook.

[0017] In this technical solution, the structural stability of the reset tension spring, the inner frame of the flip cover and the cover opening hook is ensured.

[0018] In the above technical solution, further, it also includes: Two cover arms, the two cover arms are symmetrically fixedly mounted on the bottom side of the flip cover, and the two cover arms are provided with positioning shafts on the sides away from each other; Two elastic components are respectively mounted on the two cover arms and are used to fix the two positioning shafts on the two cover arms respectively.

[0019] In this technical solution, the structural stability of the two positioning shafts and the two cover arms is ensured.

[0020] In the above technical solution, further, the two cover arms and the flip cover are an integrally formed structure.

[0021] In this technical solution, the structural stability of the two cover arms and the flip cover is ensured.

[0022] In the above technical solution, further, the elastic component includes: A slot is provided on the cover arm, and card slots are provided on the upper and lower sides of the slot and inside the cover arm; An insert block is inserted into the slot and fixed to the positioning shaft. Limiting grooves are provided on the upper and lower sides of the insert block. A limiting plate is slidably installed in the limiting groove. A clamping block is provided on one side of the limiting plate, and one side of the clamping block extends into the clamping slot. A plurality of springs are provided on the other side of the limiting plate.

[0023] In the present technical solution, a person extends his hand into the two card slots and squeezes the two card blocks, so that the two card blocks are pressed into the two limit slots respectively, and the card blocks shrink in the limit slots and enter the limit slots through the limit plates squeezing a number of springs, thereby ensuring that the plug blocks are removed from the slots, making it convenient to replace and install the damaged positioning shafts; when installing the plug blocks, a person presses the two card blocks by hand, and the two card blocks respectively drive the two limit plates to squeeze a number of springs into the corresponding limit slots, and then the plug blocks are inserted into the slots, ensuring that the positioning shafts are stably fixed on the cover arm.

[0024] In the above technical solution, further, one end of a plurality of the springs is tightly welded to the limiting plate, and the number of the springs is at least three.

[0025] In this technical solution, the structural stability of the plurality of springs and the limiting plates is ensured.

[0026] In the above technical solution, further, the clamping block is engaged with the clamping slot, the limiting plate and the clamping block are an integrally formed structure, and the inserting block and the positioning shaft are an integrally formed structure.

[0027] In this technical solution, it is ensured that the card block can be inserted into the card slot, and the structure of the limit plate and the card block is stable, and the structure of the insert block and the positioning shaft is stable.

[0028] The beneficial effects of the present invention are: The balanced reset button mechanism ensures that the cover opening button forms a balanced running track through the flip cover and the limit block of the flip cover inner frame through the cooperation of the set cover opening button, cover opening hook, button slot, rotating shaft, reset tension spring, shaft buckle, limit block and flip cover inner frame limit block; due to the addition of a balanced limit structure on the flip cover, the addition of double reset tension springs on the cover opening hook and the flip cover for reset, the addition of a rotating shaft buckle on the flip cover inner frame for positioning, to ensure that the flip cover inner frame does not bounce upward, and the flip cover inner frame and the flip cover are added with inward, upward, downward and outward tilting limit mechanisms for the cover opening button, to ensure that the cover opening button returns to the initial position along the corresponding track when reset; the appearance of the entire machine can be kept consistent during use, and due to the stable running track, the cover opening and closing process is smoother without occasional key jamming; the cover opening button can be accurately reset by utilizing the balanced track formed by the double reset tension spring, the flip cover and the flip cover inner frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the top view of the flip cover in the present invention; Figure 3 This is one of the cross-sectional structural schematic diagrams of the flip cover in the present invention; Figure 4 This is the second schematic cross-sectional structure diagram of the flip cover in the present invention; Figure 5 It is a bottom view structural schematic diagram of the flip cover in the present invention; Figure 6 It is a schematic diagram of the structure of the cover arm in the present invention; Figure 7 It is a schematic cross-sectional structural diagram of the cover arm in the present invention; Figure 8 It is a structural schematic diagram of the positioning shaft in the present invention; Fig. 9 It is a schematic diagram of a local explosion structure in the present invention.

[0030] The symbols in the figure are: 1. Open cover button; 2. Open cover hook; 3. Flip cover; 31. Key slot; 4. Flip cover inner frame; 5. Rotating shaft; 6. Reset spring; 7. Axis buckle; 8. Limit block; 9. Flip cover inner frame limit block; 10. Cover arm; 11. Positioning shaft; 12. Slot; 13. Card slot; 14. Insert block; 15. Limit slot; 16. Limit plate; 17. Card block; 18. Spring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0032] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0034] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0035] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0036] Embodiment 1: See also Figure 1-9 As shown in the figure, this embodiment provides a balance reset button mechanism, including: A flip cover 3, with key slots 31 symmetrically provided on both sides of the flip cover 3, with limit blocks 8 fixedly installed on the inner walls on both sides of the flip cover 3, a cover opening key 1 slidably installed in the key slot 31, and one end of the two cover opening keys 1 respectively penetrates through the two limit blocks 8, two cover opening hooks 2 are provided at the rear side of the two cover opening keys 1 and between the two cover opening keys 1, a rotating shaft 5 is provided between the two cover opening hooks 2, and a shaft buckle 7 is fixedly installed on the front side of the rotating shaft 5, and a flip cover inner frame 4 is provided on the front side of the shaft buckle 7 and inside the cover opening key 1; Two reset springs 6, the two reset springs 6 are respectively fixedly mounted on both sides of the flip cover inner frame 4, and the two ends of the two reset springs 6 are respectively fixed to the two cover opening hooks 2; The flip cover inner frame limit block 9 is fixedly mounted on the inner wall of the flip cover 3 .

[0037] It can be seen from this embodiment that the cover opening button 1, the cover opening hook 2, the button slot 31, the rotating shaft 5, the reset tension spring 6, the shaft buckle 7, the limit block 8 and the flip cover inner frame limit block 9 cooperate to ensure that the cover opening button 1 forms a balanced running track through the flip cover 3 and the flip cover inner frame limit block 9; Due to the addition of a balancing limit structure on the flip cover 3, a double reset tension spring 6 is added to the cover opening hook 2 and the flip cover 3 for resetting, and a rotating shaft buckle 7 is added to the flip cover inner frame 4 for positioning, to ensure that the flip cover inner frame 4 does not bounce upward, and the flip cover inner frame 4 and the flip cover 3 are increased with tilting limit mechanisms for the cover opening button 1 inward, upward, downward and outward, to ensure that the cover opening button 1 returns to the initial position along the corresponding trajectory when resetting.

[0038] Embodiment 2: This embodiment provides a balanced reset button mechanism, which, in addition to the technical solutions of the above embodiments, also has the following technical features: one end of the two cover opening buttons 1 is slidably connected to the two limit blocks 8 respectively, and the flip cover 3 and the two limit blocks 8 are an integrally formed structure.

[0039] It can be seen from this embodiment that when a person presses the cover opening button 1, the two cover opening buttons 1 can slide in the two limit blocks 8 respectively, ensuring the structural stability of the flip cover 3 and the two limit blocks 8.

[0040] Embodiment 3: This embodiment provides a balanced reset button mechanism, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the rotating shaft 5 is rotatably connected to the two cover opening hooks 2, and the cover opening button 1 is slidably connected to the button slot 31.

[0041] It can be seen from the present embodiment that when a person presses the two cover opening buttons 1 and slides in the two button grooves 31 respectively, the two cover opening buttons 1 will respectively squeeze the two cover opening hooks 2 to slide on the rotating shaft 5 and release the pressure on the rotating shaft 5, and then, the two cover opening hooks 2 will pull the flip cover inner frame 4 to flip through the two reset tension springs 6 respectively, and in the process of flipping the flip cover inner frame 4, the rotating shaft 5 will be flipped by squeezing the shaft buckle 7.

[0042] Embodiment 4: This embodiment provides a balance reset button mechanism, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the rotating shaft 5 and the shaft buckle 7 are an integrally formed structure, and the shaft buckle 7 is in contact with the flip cover inner frame 4.

[0043] It can be seen from this embodiment that the structural stability of the rotating shaft 5 and the shaft buckle 7 is ensured, so that when the two cover opening buttons 1 are not pressed by a person, the flip cover inner frame 4 is squeezed by the shaft buckle 7 to maintain structural stability.

[0044] Embodiment 5: This embodiment provides a balanced reset button mechanism, which, in addition to the technical solutions of the above embodiments, also has the following technical features: one end of the reset tension spring 6 is hung on the flip cover inner frame 4, and the other end is hung on the cover opening hook 2.

[0045] It can be seen from this embodiment that the structures of the return tension spring 6, the flip cover inner frame 4 and the cover opening hook 2 are ensured to be stable.

[0046] Embodiment 6: This embodiment provides a balance reset button mechanism, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including: Two cover arms 10, the two cover arms 10 are symmetrically fixedly mounted on the bottom side of the flip cover 3, and the two cover arms 10 are provided with a positioning shaft 11 on the side away from each other; Two elastic components are respectively mounted on the two cover arms 10 and are used to fix the two positioning shafts 11 on the two cover arms 10 respectively.

[0047] It can be seen from this embodiment that the structures of the two positioning shafts 11 and the two cover arms 10 are ensured to be stable.

[0048] Embodiment 7: This embodiment provides a balanced reset button mechanism, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the two cover arms 10 and the flip cover 3 are an integrally formed structure.

[0049] It can be seen from this embodiment that the structures of the two cover arms 10 and the flip cover 3 are ensured to be stable.

[0050] Embodiment 8: This embodiment provides a balanced reset button mechanism, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and the elastic component includes: A slot 12 is provided on the cover arm 10, and a card slot 13 is provided on the upper and lower sides of the slot 12 and located in the cover arm 10; The insert block 14 is inserted and installed in the slot 12 and fixed to the positioning shaft 11. Limiting grooves 15 are provided on the upper and lower sides of the insert block 14. A limiting plate 16 is slidably installed in the limiting groove 15. A clamping block 17 is provided on one side of the limiting plate 16, and one side of the clamping block 17 extends into the clamping slot 13. A plurality of springs 18 are provided on the other side of the limiting plate 16.

[0051] It can be seen from the present embodiment that a person reaches into the two card slots 13 by hand and squeezes the two card blocks 17, so that the two card blocks 17 are pressed into the two limit slots 15 respectively, and the card blocks 17 squeeze the plurality of springs 18 through the limit plates 16 to shrink in the limit slots 15 and enter the limit slots 15, ensuring that the insert block 14 is taken out of the slot 12, so as to facilitate the replacement and installation of the damaged positioning shaft 11; when installing the insert block 14, a person presses the two card blocks 17 by hand, and the two card blocks 17 respectively drive the two limit plates 16 to squeeze the plurality of springs 18 into the corresponding limit slots 15, and then the insert block 14 is inserted into the slot 12, ensuring that the positioning shaft 11 is stably fixed on the cover arm 10.

[0052] Embodiment 9: This embodiment provides a balanced reset button mechanism, which, in addition to the technical solutions of the above embodiments, also has the following technical features: one end of a plurality of springs 18 is tightly welded to the limit plate 16, and the number of the springs 18 is at least three.

[0053] It can be seen from this embodiment that the structures of the springs 18 and the limiting plates 16 are ensured to be stable.

[0054] Embodiment 10: This embodiment provides a balance reset button mechanism, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the block 17 is engaged with the slot 13, the limit plate 16 and the block 17 are an integrally formed structure, and the insert block 14 and the positioning shaft 11 are an integrally formed structure.

[0055] It can be seen from this embodiment that the clamping block 17 can be inserted into the clamping slot 13, the structure of the limiting plate 16 and the clamping block 17 is ensured to be stable, and the structure of the inserting block 14 and the positioning shaft 11 is ensured to be stable.

[0056] Working principle: the cover opening button 1 forms a balanced running track through the flip cover 3 and the limit block 9 of the flip cover inner frame; due to the addition of a balanced limit structure on the flip cover 3, a double reset tension spring 6 is added to the cover opening hook 2 and the flip cover 3 for reset, and a rotating shaft buckle 7 is added to the flip cover inner frame 4 for positioning to ensure that the flip cover inner frame 4 does not bounce upward, and the flip cover inner frame 4 and the flip cover 3 are added with an inward, upward, downward and outward tilt limit mechanism for the cover opening button 1 to ensure that the cover opening button 1 returns to the initial position along the corresponding track when reset; during the use of the whole machine, the appearance can be kept consistent, and due to the stable running track, the process of opening and closing the cover is smoother, and there will be no occasional key jamming; the cover opening button 1 can be accurately reset by using the balanced track formed by the double reset tension spring 6, the flip cover 3 and the flip cover inner frame 4; The personnel put their hands into the two card slots 13 and squeeze the two card blocks 17, so that the two card blocks 17 are pressed into the two limit slots 15 respectively, and the card blocks 17 squeeze the plurality of springs 18 through the limit plates 16 to shrink in the limit slots 15 and enter the limit slots 15, ensuring that the plug block 14 is taken out of the slot 12, so as to facilitate the replacement and installation of the damaged positioning shaft 11; when installing the plug block 14, the personnel press the two card blocks 17 by hand, and the two card blocks 17 respectively drive the two limit plates 16 to squeeze the plurality of springs 18 into the corresponding limit slots 15, and then, the plug block 14 is inserted into the slot 12 to ensure that the positioning shaft 11 is stably fixed on the cover arm 10.

[0057] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A balance reset button mechanism, characterized in that: include: A flip cover (3), wherein key slots (31) are symmetrically provided on both sides of the flip cover (3), and limit blocks (8) are fixedly installed on the inner walls of both sides of the flip cover (3), and a cover opening key (1) is slidably installed in the key slot (31), and one end of the two cover opening keys (1) respectively passes through the two limit blocks (8), and two cover opening hooks (2) are provided at the rear side of the two cover opening keys (1) and between the two cover opening keys (1), and a rotating shaft (5) is provided between the two cover opening hooks (2), and a shaft buckle (7) is fixedly installed on the front side of the rotating shaft (5), and a flip cover inner frame (4) is provided at the front side of the shaft buckle (7) and inside the cover opening key (1); Two reset tension springs (6), the two reset tension springs (6) being respectively fixedly mounted on two sides of the flip cover inner frame (4), and the two ends of the two reset tension springs (6) being respectively fixed to the two cover opening hooks (2); A flap inner frame limit block (9), wherein the flap inner frame limit block (9) is fixedly mounted on the inner wall of the flap (3).

2. The balance reset button mechanism according to claim 1, characterized in that: One end of the two cover opening buttons (1) is slidably connected to the two limit blocks (8) respectively, and the flip cover (3) and the two limit blocks (8) are an integrally formed structure.

3. The balance reset button mechanism according to claim 1, characterized in that: The rotating shaft (5) is rotatably connected to the two cover opening hooks (2), and the cover opening button (1) is slidably connected to the button slot (31).

4. The balance reset button mechanism according to claim 1, characterized in that: The rotating shaft (5) and the shaft buckle (7) are an integrally formed structure, and the shaft buckle (7) is in contact with the flip cover inner frame (4).

5. The balance reset button mechanism according to claim 1, characterized in that: One end of the return tension spring (6) is hung on the flip cover inner frame (4), and the other end is hung on the cover opening hook (2).

6. The balance reset button mechanism according to claim 1, characterized in that: Also includes: Two cover arms (10), the two cover arms (10) being symmetrically fixedly mounted on the bottom side of the flip cover (3), and a positioning shaft (11) being provided on the sides of the two cover arms (10) that are away from each other; Two elastic components are respectively mounted on the two cover arms (10) and are used to fix the two positioning shafts (11) on the two cover arms (10).

7. The balance reset button mechanism according to claim 6, characterized in that: The two cover arms (10) and the flip cover (3) are an integrally formed structure.

8. The balance reset button mechanism according to claim 6, characterized in that: The elastic component comprises: A slot (12), the slot (12) being provided on the cover arm (10), and card slots (13) being provided on upper and lower sides of the slot (12) and located inside the cover arm (10); An insert block (14) is inserted and installed in the slot (12) and fixed to the positioning shaft (11); upper and lower sides of the insert block (14) are provided with limit slots (15); a limit plate (16) is slidably installed in the limit slot (15); a clamping block (17) is provided on one side of the limit plate (16); and one side of the clamping block (17) extends into the clamping slot (13); and a plurality of springs (18) are provided on the other side of the limit plate (16).

9. The balance reset button mechanism according to claim 8, characterized in that: One end of a plurality of the springs (18) is tightly welded to the limiting plate (16), and the number of the springs (18) is at least three.

10. The balance reset button mechanism according to claim 9, characterized in that: The clamping block (17) is engaged with the clamping slot (13), the limiting plate (16) and the clamping block (17) are an integrally formed structure, and the inserting block (14) and the positioning shaft (11) are an integrally formed structure.

Images