A timer and its hairspring balance assembly

Abstract

The present invention discloses a timer and a hairspring balance assembly thereof, wherein the hairspring balance assembly comprises a frame, a hairspring, a balance wheel and a rotating shaft; the frame is used to be connected to the housing of the timer, the hairspring and the balance wheel are sleeved on the rotating shaft, the rotating shaft is pivotally connected to the frame, and the frame is provided with a fixing structure for fixing the hairspring bending structure at the end of the hairspring. When the hairspring balance assembly needs to be debugged separately, the modular hairspring balance assembly can be removed from the housing of the timer as a whole, and when the debugging is completed, the hairspring balance assembly is assembled with the housing of the timer as a whole, thereby avoiding the problem of small space and difficult debugging when the hairspring balance wheel is directly assembled on the housing of the timer, greatly improving the assembly efficiency, and facilitating the design of the automated assembly process, reducing the dependence on manual assembly.

Description

Technical Field

[0001] The invention belongs to the field of timing equipment, and in particular relates to a timer and a hairspring balance assembly thereof. Background Art

[0002] Mechanical timer is a product with mature technology. The clock mechanism is used as the transmission mechanism, and the starting mechanism and signal output mechanism are added to form a timing device. The above mechanism is set in a housing, in a frame composed of an upper and lower splint fixed by a splint column. The transmission mechanism is composed of a gear system composed of a head wheel component, a second wheel component, a third wheel component, etc., and an escape wheel component, an escapement fork and a balance spring component; the starting mechanism is composed of a main cam fixed on the head wheel shaft, a slave cam and a stop gate; the signal output mechanism is composed of a lever, a conductive reed, a hammer and a bell that start and close the control circuit. The specific transformation of the timing limit position and the disconnection position is achieved by changing the position of the main cam positioning hook and cooperating with the stop gate positioning hole.

[0003] The Chinese patent application number CN98212694 discloses a hairspring timer, which includes a housing component, a transmission wheel train component, a time limit control component, and a switch seat component. It uses a spring as a power source, and transmits the energy stored in the spring to the pallet fork through the transmission gear to drive the balance wheel to swing, gradually releasing energy, and driving the head wheel handle and the timing wheel and limit cam connected thereto to the set position. When the timing lever is pressed by the spring, the pallet fork of the timing lever falls into the notch of the timing wheel, and the moving and static contacts are disengaged, so that the circuit connected to the timer is disconnected, thereby achieving the function of a timing switch.

[0004] Chinese patent application number CN200320101810 discloses a mechanical timer, including a gear transmission mechanism fixed in a frame, an escapement mechanism, a balance spring mechanism, a main cam fixed on the head wheel shaft, a slave cam and a stopper fixed on the frame, and a lever, a conductive reed, a hammer and a bell for starting and closing a control circuit. The gear transmission mechanism includes a plurality of groups of gear sets meshing with each other, and the stopper component is composed of a stopper plate and an insulating block. A brake plate is fixed between the stopper plate and the insulating block, and the other end of the brake plate can cooperate with the balance wheel of the balance spring mechanism.

[0005] A Chinese patent with application number CN201921904726 discloses a timer with a vibrating feel and a sound, including a back bell with an open end and an inner cavity, and a running wheel assembly installed in the inner cavity of the back bell and equipped with a spring, an alarm wheel assembly, an escapement driven by the running wheel assembly, and a hammer with a hammer head; the escapement includes a balance wheel with a hairspring, the running wheel shaft in the running wheel assembly, the alarm wheel shaft in the alarm wheel assembly, and the balance wheel shaft are arranged parallel to each other and rotatably positioned on the upper and lower plywood, the hammer is swingably positioned between the upper and lower plywood through the hammer shaft and is provided with a timing rod; a second gear is fixed to the middle of the running wheel shaft, and the second gear drives the escapement through a bridge gear set.

[0006] It can be seen that the balance wheel and hairspring system is the core part of the timer and serves as a timing reference. Adjusting the balance wheel and hairspring system can adjust the timing accuracy of the timer.

[0007] In the prior art, since the hairspring balance system is connected to the housing of the timer, when the hairspring balance system needs to be debugged multiple times, the assembled timer must be disassembled again before the hairspring balance system can be removed, which undoubtedly reduces the production efficiency of the timer and increases the cost of the timer.

[0008] In view of this, the present invention is proposed. Summary of the invention

[0009] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a hairspring balance assembly for a timer, aiming to improve the assembly efficiency of the timer by integrating the hairspring and the balance wheel into an independent integral modular structure that can be assembled as a whole with the casing of the timer.

[0010] Another object of the present invention is to provide a timer comprising the above-mentioned hairspring balance assembly.

[0011] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0012] A hairspring balance wheel assembly for a timer, comprising a frame, a hairspring, a balance wheel and a rotating shaft;

[0013] The frame is used to be connected to the housing of the timer, the hairspring and the balance wheel are mounted on the rotating shaft, the rotating shaft is pivotally connected to the frame, and the frame is provided with a fixing structure for fixing the hairspring bending structure at the end of the hairspring.

[0014] Furthermore, the frame comprises a first side wall and a second side wall which are arranged opposite to each other, and two ends of the rotating shaft are pivotally connected to the first side wall and the second side wall respectively;

[0015] The first side wall, the hairspring, the balance wheel and the second side wall are connected in sequence.

[0016] Furthermore, the first side wall and the second side wall are made of hard plastic, and the fixing structure includes a fixing pin column and a fixing pin with a hollow interior;

[0017] The fixing pin is protrudingly arranged on the inner side surface of the second side wall opposite to the first side wall and extends toward the first side wall. A convex rib is arranged at the end of the fixing pin, and the convex rib cooperates with the fixing pin to fix the hairspring bending structure.

[0018] Furthermore, the first side wall and the second side wall are respectively provided with shaft holes, and both ends of the rotating shaft are respectively installed in the corresponding shaft holes;

[0019] Preferably, a bearing is provided between the rotating shaft and the shaft hole, the outer wall of the bearing is stepped along the axial direction, the end of the bearing with a smaller diameter matches the diameter of the shaft hole and is arranged in the shaft hole, and the inner end surface of the end with a larger diameter conflicts with the outer surface of the first side wall / the second side wall;

[0020] A protrusion is provided on the outer side surface of the first side wall / the second side wall for matching with the end with a larger diameter of the bearing.

[0021] Furthermore, a connection structure for connecting to a shell of a timer is provided on the outer side surface of the first side wall and / or the second side wall;

[0022] Preferably, the connection structure is a buckle.

[0023] Furthermore, the first side wall and the second side wall are made of metal material, and the fixing structure is arranged at the bottom of the first side wall, and includes a first fixing portion and a second fixing portion;

[0024] The first fixing portion is a plate-shaped structure formed by extending the bottom edge of the first side wall toward the hairspring, and the first fixing portion is provided with a first opening groove with an opening direction toward the hairspring;

[0025] The second fixing portion is a "V"-shaped folded edge structure formed by extending the bottom edge of the first side wall toward the direction of the hairspring and then folding back, and the opening of the "V"-shaped folded edge structure constitutes a second opening groove of the second fixing portion;

[0026] The hairspring bending structure is inserted into the first opening groove and the second opening groove and is fixedly arranged relative to the first fixing portion and the second fixing portion.

[0027] Furthermore, blind holes are provided on the inner side surfaces of the first side wall and the second side wall that are opposite to each other, and the two ends of the rotating shaft are respectively embedded in the blind holes.

[0028] Furthermore, the first side wall and / or the second side wall is provided with an observation hole for observing the direction of the fixed needle on the balance wheel.

[0029] A timer, comprising a housing and the hairspring balance assembly as described above;

[0030] The housing comprises a first cover body and a second cover body which are buckled with each other, and a mounting opening for mounting the balance spring assembly is provided at the buckling position of the first cover body and the second cover body.

[0031] Furthermore, a cam assembly, a gear transmission assembly, an escapement assembly and a switch assembly are provided in the housing;

[0032] The frame is connected to the housing, and the balance wheel is matched with the escapement assembly.

[0033] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0034] 1. The present invention integrates the hairspring and the balance wheel with the frame into an integral modular structure. The connection between the hairspring balance wheel assembly and the timer housing is realized through the connection relationship between the frame and the housing of the timer. In addition, the hairspring bending structure at the end of the hairspring is relatively fixedly arranged with the frame. Therefore, when it is necessary to debug the hairspring balance wheel assembly separately, the hairspring balance wheel assembly can be removed from the housing of the timer as a whole. After the debugging is completed, the hairspring balance wheel assembly and the housing of the timer are assembled as a whole.

[0035] 2. The present invention does not require the disassembly of other assembled structures of the timer, and can disassemble and assemble the hairspring balance assembly as a whole, thereby greatly improving the assembly efficiency.

[0036] 3. The balance spring assembly of the present invention has a simple structure and is easy to implement.

[0037] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0039] Figure 1 1 is a schematic structural diagram of an embodiment of a hairspring balance assembly of the present invention;

[0040] Figure 2 yes Figure 1 Exploded view of the structure;

[0041] Figure 3 yes Figure 1 A partial enlarged view of the middle part;

[0042] Figure 4 is an exploded view of a timer in one embodiment of the present invention;

[0043] Figure 5 is a schematic structural diagram of another embodiment of a hairspring balance assembly of the present invention;

[0044] Figure 6 yes Figure 5 Exploded view of the structure;

[0045] Figure 7 yes Figure 5 Side view of the middle structure;

[0046] Figure 8 yes Figure 6 A partial enlarged view of point B in the middle;

[0047] Fig. 9 is an exploded view of a timer in another embodiment of the present invention;

[0048] Fig.10 It is the external structure diagram of the timer of the present invention;

[0049] In the figure: 10, balance wheel assembly; 11, frame; 101, first side wall; 102, second side wall; 103, shaft hole; 104, bearing; 105, protrusion; 106, buckle; 107, blind hole groove; 108, convex hull; 109, observation hole; 12, balance; 121, balance wheel bending structure; 13, balance wheel; 131, fixed needle; 14, rotating shaft; 15, fixing structure; 151, fixing pin; 152, fixing pin; 153, convex rib; 154, first fixing part; 155, second fixing part; 156, first opening slot; 157, second opening slot;

[0050] 20. housing; 21. first cover; 22. second cover; 23. mounting opening; 24. sealing cover;

[0051] 30. Cam assembly;

[0052] 40. Gear transmission assembly;

[0053] 50. Escapement assembly; 51. Escapement fork;

[0054] 60. Switch assembly.

[0055] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0057] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0058] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] like Figures 1 to 10 As shown, the present invention provides a timer and a hairspring balance assembly thereof. The hairspring balance assembly 10 comprises a frame 11, a hairspring 12, a balance wheel 13 and a rotating shaft 14; the frame 11 is used to be connected to a housing 20 of the timer, the hairspring 12 and the balance wheel 13 are sleeved on the rotating shaft 14, the rotating shaft 14 is pivotally connected to the frame 11, and a fixing structure 15 for fixing a hairspring bending structure 121 at the end of the hairspring 12 is provided on the frame 11.

[0060] Detailed, such as Figure 4 , Fig. 9 and Fig.10As shown, the hairspring 12, the balance wheel 13 and the frame 11 are integrated into an integral modular structure, and the connection between the hairspring balance wheel assembly 10 and the timer housing 20 is realized through the connection relationship between the frame 11 and the housing 20 of the timer, and the hairspring bending structure 121 at the end of the hairspring 12 is relatively fixedly arranged with the frame 11. Therefore, when it is necessary to debug the hairspring balance wheel assembly 10 separately, the hairspring balance wheel assembly 10 can be removed from the timer housing 20 as a whole. After the debugging is completed, the hairspring balance wheel assembly 10 and the timer housing 20 are assembled as a whole.

[0061] In the above scheme, the present invention can disassemble and assemble the hairspring balance assembly 10 as a whole without disassembling other assembled structures of the timer, thereby greatly improving the assembly efficiency.

[0062] In further schemes, such as Figure 1 and Figure 2 , Figure 5 and Figure 6 As shown, the frame 11 includes a first side wall 101 and a second side wall 102 that are oppositely arranged, and both ends of the rotating shaft 14 are pivotally connected to the first side wall 101 and the second side wall 102 respectively, and the first side wall 101, the hairspring 12, the balance wheel 13 and the second side wall 102 are connected in sequence.

[0063] In detail, the frame 11 is a frame structure, including a first side wall 101 and a second side wall 102 arranged opposite to each other. The hairspring 12 and the balance wheel 13 are coaxially assembled and then assembled with the first side wall 101 and the second side wall 102, while ensuring that the rotating shaft 14 can pivot relative to the first side wall 101 and the second side wall 102.

[0064] In the above solution, by arranging the two ends of the rotating shaft 14 to be relatively pivotally connected to the first side wall 101 and the second side wall 102 , the hairspring 12 and the balance wheel 13 can realize their own functions under the action of the escapement assembly 50 .

[0065] The present invention simplifies the structure of the balance spring assembly 10 of the present invention without affecting the function of the balance spring assembly 10, and is easy to implement.

[0066] In one embodiment of the present invention, Figures 1 to 4As shown, the first side wall 101 and the second side wall 102 are made of hard plastic, and the fixing structure 15 includes a fixing pin 152 column 151 and a fixing pin 152 which are hollow inside; the fixing pin 152 column 151 is protruded on the inner side surface of the second side wall 102 which is opposite to the first side wall 101, and extends toward the first side wall 101, and a convex rib 153 is provided at the end of the fixing pin 152 column 151, and the convex rib 153 cooperates with the fixing pin 152 to fix the hairspring bending structure 121.

[0067] In detail, the following steps are included when assembling the balance spring assembly 10:

[0068] A1, such as Figure 2 As shown, the rotating shaft 14 is inserted into the center holes of the hairspring 12 and the balance wheel 13, and the positions of the hairspring 12 and the balance wheel 13 are relatively fixed;

[0069] A2, assemble the two ends of the rotating shaft 14 with the frame 11;

[0070] A3, such as Figure 3 As shown, the hairspring bending structure 121 at the end of the hairspring 12 is hooked on the convex rib 153, and the fixing pin 152 is inserted into the hollow structure of the fixing pin 152 column 151 to lock the hairspring bending structure 121, thereby fixing the hairspring bending structure 121.

[0071] In the preferred scheme, in step S1, a limiting groove is radially provided at a position on the rotating shaft 14 where the hairspring 12 and the balance wheel 13 are relatively fixedly arranged, and the center holes of the hairspring 12 and the balance wheel 13 are arranged as a lamellar hole structure matching the limiting groove, and the relative fixed arrangement of the hairspring 12, the balance wheel 13 and the rotating shaft 14 is achieved through the cooperation of the limiting groove and the lamellar hole.

[0072] In a further solution, the first side wall 101 and the second side wall 102 are respectively provided with shaft holes 103 , and both ends of the rotating shaft 14 are respectively installed in the corresponding shaft holes 103 .

[0073] In detail, in the assembly step A2, both ends of the rotating shaft 14 are respectively installed in the corresponding shaft holes 103.

[0074] In a preferred embodiment, a bearing 104 is provided between the rotating shaft 14 and the shaft hole 103, and the outer wall of the bearing 104 is stepped along the axial direction. The end of the bearing 104 with a smaller diameter matches the diameter of the shaft hole 103 and is arranged in the shaft hole 103, and the inner end surface of the end with a larger diameter conflicts with the outer side surface of the first side wall 101 / the second side wall 102;

[0075] A protrusion 105 for matching with an end of the bearing 104 with a larger diameter is provided on the outer side surface of the first side wall 101 / the second side wall 102 .

[0076] Detailed, such as Figures 1 to 4 As shown, the bearing 104 can support the rotating shaft 14, because the end of the bearing 104 with a larger diameter protrudes from the first side wall 101 and the second side wall 102. Therefore, in order to install the frame 11 into the timer housing 20, the housing 20 of the timer is provided with a groove for removing the interference of the bearing 104. Then, when the frame 11 is installed in the timer housing 20 as a whole, the groove originally used for removing the interference forms a gap. In the present invention, a protrusion 105 for matching with the end of the bearing 104 with a larger diameter is provided on the outer side of the first side wall 101 / the second side wall 102. When the frame 11 is installed in the timer housing 20 as a whole, the protrusion 105 cooperates with the groove to reduce the gap, thereby preventing dust from entering the timer and affecting the accuracy of the timer.

[0077] In a further solution, a connection structure for connecting to a housing 20 of a timer is provided on the outer surface of the first side wall 101 and / or the second side wall 102 .

[0078] In the above solution, a connection structure for connecting with the housing 20 of the timer is provided on the first side wall 101 and the second side wall 102 , which has a simple structure and is easy to implement.

[0079] In a preferred solution, the connection structure is a buckle 106 formed during the integral molding process with the first side wall 101 and the second side wall 102 of the hard plastic, and the housing 20 of the timer is provided with a slot that cooperates with the buckle 106. The assembly relationship between the frame 11 and the housing 20 of the timer is achieved through the cooperation between the buckle 106 and the slot.

[0080] In another embodiment of the present invention, Figures 5 to 9 As shown, the first side wall 101 and the second side wall 102 are made of metal material, and the fixing structure 15 is disposed at the bottom of the first side wall 101 , and includes a first fixing portion 154 and a second fixing portion 155 .

[0081] The first fixing portion 154 is a plate-shaped structure formed by extending the bottom edge of the first side wall 101 toward the hairspring 12 . The first fixing portion 154 is provided with a first opening groove 156 with an opening direction toward the hairspring 12 .

[0082] The second fixing portion 155 is a “V”-shaped folded edge structure formed by extending the bottom edge of the first side wall 101 toward the hairspring 12 and then folding back, and the opening of the “V”-shaped folded edge structure constitutes a second opening groove 157 of the second fixing portion 155 .

[0083] The hairspring bending structure 121 is inserted into the first opening slot 156 and the second opening slot 157 and fixedly disposed relative to the first fixing portion 154 and the second fixing portion 155 .

[0084] In detail, the assembly of the balance spring assembly 10 mainly includes the following steps:

[0085] B1, such as Figure 6 As shown, the rotating shaft 14 is inserted into the center holes of the hairspring 12 and the balance wheel 13, and the positions of the hairspring 12 and the balance wheel 13 are relatively fixed;

[0086] B2, assemble the two ends of the rotating shaft 14 with the frame 11;

[0087] B3, such as Figure 8 As shown, the hairspring bending structure 121 at the end of the hairspring 12 is passed through the first opening groove 156 and the second opening groove 157 in sequence, and then the first opening groove 156 and the second opening groove 157 are clamped with pliers to fix the hairspring bending structure 121.

[0088] In the above scheme, the metal material's characteristic of long-lasting deformation is utilized, and after the hairspring bending structure 121 passes through the first opening groove 156 and the second opening groove 157 in sequence, the staff then clamps the first opening groove 156 and the second opening groove 157 with pliers to fix the hairspring bending structure 121. The implementation method is simple and feasible.

[0089] It is understandable that there are many ways to relatively fix the hairspring 12, the balance wheel 13 and the rotating shaft 14 in step B1. The matching structure of the limit groove and the sheet hole in the above embodiment can be adopted, and other methods can also be adopted. Only structures that can achieve the above functions are within the protection scope of the present invention.

[0090] In a further solution, blind holes 107 are provided on the opposite sides of the first side wall 101 and the second side wall 102 , and both ends of the rotating shaft 14 are respectively embedded in the blind holes 107 .

[0091] In the above scheme, utilizing the good ductility of metal materials, in step B2, blind holes 107 are provided on the first side wall 101 and the second side wall 102, so that both ends of the shaft 14 are respectively embedded in the blind holes 107 to achieve connection between the shaft 14 and the frame 11.

[0092] In a preferred solution, the rotating shaft 14 is a shaft with pointed ends at both ends, and the pointed ends abut against the blind hole groove 107 and can pivotally rotate relative to the blind hole groove 107 .

[0093] Furthermore, during the process of forming the blind hole, the back of the blind hole groove 107 protrudes to form a convex bump 108 with the outer side surfaces of the first side wall 101 and the second side wall 102, thereby enhancing the supporting effect of the blind hole groove on the rotating shaft.

[0094] In a preferred solution, the edges of the first side wall and the second side wall of the frame are provided with a concave-convex matching structure, and a stepped structure matching the concave-convex structure can be provided on the shell of the timer. The wall thickness of the frame is used to be stuck in the stepped structure of the shell to achieve the assembly relationship between the frame and the timer shell.

[0095] It can be understood that, in the above two embodiments, the first side wall and / or the second side wall is provided with an observation hole 109 for observing the direction of the fixed needle 131 on the balance wheel.

[0096] The observation hole 109 is provided to facilitate the staff to observe the direction of the fixed needle 131 on the balance wheel to ensure the assembly relationship.

[0097] It can also be understood that, in the above two embodiments, the frame 11 should also include a third side wall and / or a fourth side wall for stabilizing the first side wall 101 and the second side wall 102. For example, the third side wall is a side wall connected to the first side wall 101 and the second side wall 102 on both sides, and the fourth side wall is a top wall connected to the first side wall 101, the second side wall 102, and the third side wall, etc.

[0098] It is also understandable that the first side wall 101, the second side wall 102, the third side wall and the fourth side wall described in the present invention may not be complete structures, and may be provided with structures such as grooves or through holes for cooperating with other components of the timer.

[0099] For example, for the second side wall 102 made of metal, the position where the blind hole slot 107 is set can be set as a beam structure, such as Figure 6 When the two ends of the rotating shaft 14 are assembled with the frame 11 in step B2, the structure of the crossbeam can provide a deformation to facilitate the assembly of the rotating shaft 14 with the first side wall 101 and the second side wall 102.

[0100] It is further understandable that structures such as reinforcing ribs for enhancing the stability of the frame 11 may be provided between the first side wall 101 , the second side wall 102 , the third side wall and the fourth side wall described in the present invention.

[0101] In another embodiment of the present invention, the timer of the present invention includes a housing 20 and the above-mentioned balance spring assembly 10 .

[0102] The housing 20 includes a first cover 21 and a second cover 22 that are buckled with each other. An installation opening 23 for installing the balance spring assembly 10 is provided at the buckled portion between the first cover 21 and the second cover 22 .

[0103] After the balance assembly 10 is assembled as a whole, it is installed into the housing 20 formed by the first cover 21 and the second cover 22 through the installation opening 23 .

[0104] When it is necessary to remove the balance spring assembly 10 from the housing 20 , the staff can perform the disassembly work through the installation opening 23 .

[0105] It is understandable that the housing 20 of a general timer is made of plastic material. Therefore, when the frame 11 is also made of plastic material, when the balance spring assembly 10 is installed in the housing 20, one of the side walls of the frame 11 can serve as a cover 24 of the installation opening 23.

[0106] When the frame 11 is made of metal, Fig. 9 As shown, a cover 24 may be separately provided for the installation opening 23 , and when the balance assembly 10 is installed into the housing 20 , the installation opening 23 is sealed by the cover 24 .

[0107] In a further solution, a cam assembly 30 , a gear transmission assembly 40 and an escapement assembly 50 are disposed in the housing 20 ; the frame 11 is connected to the housing 20 , and the balance wheel 13 cooperates with the escapement assembly 50 .

[0108] The balance wheel 13 of the balance wheel assembly 10 cooperates with the pallet fork 51 in the escapement assembly 50 to achieve its function. Therefore, when the balance wheel assembly 10 is installed as a whole into the housing 20, the cooperation relationship between the balance wheel 13 assembly and the pallet fork must be ensured.

[0109] Therefore, an observation hole may be provided on the housing 20 , through which a worker can conveniently observe whether the balance wheel 13 is correctly connected to the pallet fork 51 .

[0110] In detail, the assembly method of the timer of the present invention comprises the following steps:

[0111] C1, installing the cam assembly 30 on the first cover body 21;

[0112] C2, assembling the gear transmission assembly 40 and the escapement assembly 50 with the cam assembly 30;

[0113] C3, buckle the second cover 22 with the first cover 21;

[0114] C4, after assembling the hairspring 12 and the balance wheel 13 with the frame 11 through the rotating shaft 14, the hairspring bending structure 121 of the hairspring 12 is fixed relatively to the frame 11 through the fixing structure 15;

[0115] C5. Install the balance spring assembly 10 into the housing 20 formed by the second cover 22 and the first cover 21 through the installation opening 23 , and cooperate with the escapement assembly 50 .

[0116] It should be noted that if Fig.10 As shown, the timer of the present invention also includes other components required to realize its timing function, such as a switch assembly 60, etc., and after the hairspring balance assembly 10 is installed in the housing 20 of the timer and the balance wheel 13 is matched with the escapement assembly 50, the working principle of the timer is no different from the prior art. Therefore, the present invention will not repeat the working principle of the timer.

[0117] The present invention modularizes the timer structure, including a hairspring balance assembly, a gear drive assembly, and a switch assembly. Since the assembly process of the hairspring balance is the most complicated, the present invention simplifies the complicated process, and produces the hairspring balance as an independent assembly, which is convenient for debugging and assembling the hairspring balance assembly, and avoids the problem of small space and difficult debugging when the hairspring balance is directly assembled on the timer housing. The assembly efficiency is greatly improved, and the design of the automated assembly process is convenient, reducing the dependence on manual assembly.

[0118] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A hairspring balance assembly for a timer, characterized in that: Including frame, hairspring, balance wheel and rotating shaft; The frame is used to connect with the housing of the timer, the hairspring and the balance wheel are sleeved on the rotating shaft, the rotating shaft is pivotally connected to the frame, and the frame is provided with a fixing structure for fixing the hairspring bending structure at the end of the hairspring; The frame comprises a first side wall and a second side wall which are arranged opposite to each other, and two ends of the rotating shaft are pivotally connected to the first side wall and the second side wall respectively; The first side wall, the hairspring, the balance wheel and the second side wall are connected in sequence.

2. A hairspring balance assembly for a timer according to claim 1, characterized in that: The first side wall and the second side wall are made of hard plastic, and the fixing structure includes a fixing pin column and a fixing pin with a hollow interior; The fixing pin is protrudingly arranged on the inner side surface of the second side wall opposite to the first side wall and extends toward the first side wall. A convex rib is arranged at the end of the fixing pin, and the convex rib cooperates with the fixing pin to fix the hairspring bending structure.

3. A hairspring balance assembly for a timer according to claim 2, characterized in that: The first side wall and the second side wall are respectively provided with shaft holes, and both ends of the rotating shaft are respectively installed in the corresponding shaft holes.

4. A hairspring balance assembly for a timer according to claim 3, characterized in that: A bearing is provided between the rotating shaft and the shaft hole, the outer wall of the bearing is stepped along the axial direction, the end of the bearing with a smaller diameter matches the diameter of the shaft hole and is arranged in the shaft hole, and the inner end surface of the end with a larger diameter conflicts with the outer side surface of the first side wall / the second side wall; A protrusion is provided on the outer side surface of the first side wall / the second side wall for matching with the end with a larger diameter of the bearing.

5. A hairspring balance assembly for a timer according to claim 3, characterized in that: A connection structure for connecting to a housing of a timer is provided on the outer side surface of the first side wall and / or the second side wall; The connection structure is a buckle.

6. A hairspring balance assembly for a timer according to claim 1, characterized in that: The first side wall and the second side wall are made of metal material, and the fixing structure is arranged at the bottom of the first side wall and includes a first fixing portion and a second fixing portion; The first fixing portion is a plate-shaped structure formed by extending the bottom edge of the first side wall toward the hairspring, and the first fixing portion is provided with a first opening groove with an opening direction toward the hairspring; The second fixing portion is a "V"-shaped folded edge structure formed by extending the bottom edge of the first side wall toward the direction of the hairspring and then folding back, and the opening of the "V"-shaped folded edge structure constitutes a second opening groove of the second fixing portion; The hairspring bending structure is inserted into the first opening groove and the second opening groove and is fixedly arranged relative to the first fixing portion and the second fixing portion.

7. A hairspring balance assembly for a timer according to claim 6, characterized in that: Blind hole grooves are arranged on the inner side surfaces opposite to each other of the first side wall and the second side wall, and the two ends of the rotating shaft are respectively embedded in the blind hole grooves.

8. A hairspring balance assembly for a timer according to any one of claims 1 to 7, characterized in that: The first side wall and / or the second side wall is provided with an observation hole for observing the direction of the fixed needle on the balance wheel.

9. A timer, comprising a housing, characterized in that: Also includes a hairspring balance assembly as described in any one of claims 1 to 8; The housing comprises a first cover body and a second cover body which are buckled with each other, and a mounting opening for mounting the balance spring assembly is provided at the buckling position of the first cover body and the second cover body.

10. A timer according to claim 9, characterized in that: The housing is provided with a cam assembly, a gear transmission assembly, an escapement assembly and a switch assembly; The frame is connected to the housing, and the balance wheel is matched with the escapement assembly.

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