A mechanical timer

Abstract

The present invention provides a mechanical timer, comprising: a housing and a main shaft assembly, a driving mechanism, a transmission mechanism, an adjusting mechanism and a lever mechanism respectively arranged in the housing, the main shaft assembly drives the driving mechanism, the adjusting mechanism is connected to the transmission mechanism, the lever mechanism cooperates with the main shaft assembly and the bell mechanism on the housing through a lever member arranged in the housing, one end of the lever member is rotatably arranged in the housing, the upper end of the lever member cooperates with the bell mechanism, and the lower end of the lever member cooperates with the main shaft assembly, the adjusting mechanism comprises: an escape wheel and a balance wheel assembly, the escape wheel is connected to the transmission mechanism; the adjusting mechanism also comprises an adjusting block arranged on the housing for adjusting the balance wheel assembly, one end of the adjusting block is coaxially connected to the balance wheel assembly. The mechanical timer of the present invention has a simple overall structure, is easy to operate, has a reasonable internal arrangement, can quickly adjust the total timing time through the adjusting mechanism during mass production, and improves the accuracy and qualified rate of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of timers, and in particular to a mechanical timer. Background Art

[0002] An electric oven is a kitchen appliance that uses radiant heat from electric heating elements to bake food. It is a traditional way of cooking food because it heats food through the principle of heat conduction. Food is heated evenly and the moisture and original nutrients of the food are better preserved. Therefore, it is very popular. With the increasing use of electric ovens, the use of electric oven timers is increasingly valued by families.

[0003] The existing mechanical timer of the oven generally includes three parts: the first part is the power component; the second part is the mechanism for releasing the energy of the spring, which is composed of a series of gear speed changes to increase the number of rotations of the spring when it is relaxed. An escape wheel, an escape claw and a hairspring are arranged at the end of the gear train to ensure that the speed of the gear train is constant under the drive of the spring. The hairspring has an adjustment device that can adjust its length to adjust the frequency of the swing of the escape claw, so as to ensure that the gear train rotates at a set speed, and the spring will not be completely relaxed at once, and the speed will not be affected by the tightness of the spring to cause changes in the speed; the third part is a timing trigger mechanism. When the spring is tightened, the timing trigger mechanism is also triggered synchronously, that is, the contact of the timing device is closed and connected to complete the timing function; and the setting of the existing timer trigger mechanism cannot well ensure that the bell is struck at the same time when the reed is disconnected, so as to play the effect of reminding the user, and the overall internal structure is relatively complex and troublesome to disassemble and assemble; in addition, the existing timer cannot be more conveniently adjusted through the adjustment mechanism to quickly adjust the total timing time during mass production, and the accuracy and qualified rate of the product are both low. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The technical problem to be solved by the present invention is to provide a mechanical timer which can quickly adjust the total timing time through an adjustment mechanism during mass production, effectively improve the accuracy and qualified rate of products, and has a good bell-ringing timing effect.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the present invention discloses a mechanical timer, comprising: a shell and a main shaft assembly, a driving mechanism, a transmission mechanism, an adjusting mechanism and a lever mechanism respectively arranged in the shell, the main shaft assembly drives the driving mechanism, the adjusting mechanism is connected with the transmission mechanism, the transmission mechanism and the adjusting mechanism control the rotation of the main shaft assembly, the lever mechanism cooperates with the main shaft assembly and the bell hammer mechanism on the shell respectively through a lever member arranged in the shell, the setting of this structure utilizes the adjusting effect of the adjusting mechanism to achieve changes in different timing requirements, and the lever mechanism is also provided to ensure that the bell hammer mechanism rings at the same time as the timing ends, and the reed on one side of the timer is disconnected, the overall structure is simple, the internal structure is arranged, and the user is more convenient in operation.

[0008] Furthermore, the adjusting mechanism comprises: an escapement wheel and a balance assembly, the escapement wheel is connected to the transmission mechanism, and the balance assembly is disposed in the housing; the adjusting mechanism also comprises an adjusting block disposed on the housing for adjusting the balance assembly, one end of the adjusting block is connected to the balance assembly, and the arrangement of this structure can utilize the adjusting mechanism to control the rotation of the main shaft assembly to achieve timing frequency adjustment, the arrangement of the adjusting block can facilitate user operation and use, and the overall structure is simple and occupies less space; the adjusting block comprises: an adjusting portion and a mounting portion, the adjusting portion is disposed at one end of the adjusting block to cooperate with the balance assembly, and the adjusting block is disposed on the housing through the mounting portion, and the arrangement of this structure can make the fixing of the adjusting block more secure, and the adjusting portion is utilized to adjust the balance assembly to change the center distance between the balance assembly and the escapement wheel, and operation and use are more convenient.

[0009] Furthermore, a mounting groove is provided on the shell, one end of the adjusting block is rotatably arranged in the mounting groove, a mounting hole is eccentrically arranged on the adjusting block, one end of the balance wheel assembly is arranged in the mounting hole through a rotating shaft, the adjusting block is installed by utilizing the mounting groove, and different center distances are adjusted by utilizing the mounting hole, small space is occupied, the adjustment operation is simple, and the overall structure is reasonably arranged.

[0010] Furthermore, one end of the lever member is rotatably arranged in the shell, the upper end of the lever member cooperates with the bell hammer mechanism, and the lower end of the lever member cooperates with the main shaft assembly. By utilizing the lever structure formed by the lever member in the shell, the lever member can be driven by the rotation of the main shaft assembly to achieve the effects of ringing reminders and automatic power-off when timing. The lever structure is reasonably arranged and the internal structure is simple. The bell hammer mechanism, the main shaft assembly and the lever member are tightly connected and matched, which can effectively improve the use effect.

[0011] Furthermore, the lever member includes: a first contact portion and a second contact portion, the upper end surface of the second contact portion is higher than the first contact portion, and the first contact portion is in contact and cooperate with the main shaft assembly; the second contact portion cooperates with the hammer of the bell mechanism, and the hammer is rotatably arranged on the shell, and a through hole is opened on the shell, and the upper end of the second contact portion passes through the second contact portion, and the first contact portion and the second contact portion cooperate with the main shaft assembly and the bell mechanism respectively to achieve the bell-ringing power-off effect of the timer, and the same hole opened on the shell can ensure the cooperation between the second contact portion and the bell mechanism, and the internal structure is more reasonable.

[0012] Furthermore, a movable reed and a static reed are provided on one side of the shell, and a first protrusion is provided on the side of the lower end of the lever member facing the main shaft assembly, and the first protrusion cooperates with the main shaft assembly. A cam is provided in the shell, and the cam is provided at one end of the main shaft assembly. A groove is provided on the edge of the cam, and the first protrusion cooperates with the groove on the cam. The setting of the first protrusion can cooperate with the groove on the cam to drive the lever assembly to rotate to achieve the bell-ringing effect of the bell hammer mechanism and the power-off effect of the reed. The structure is reasonably set up, and a second protrusion is provided on the side of the lever member away from the main shaft assembly, and the second protrusion cooperates with one side of the movable reed. The cooperation of the second protrusion and the movable reed can realize the disconnection and closing between the movable reed and the static reed, thereby ensuring the safe use of the oven, and automatically cutting off the power when the timing ends, ensuring the safety of use.

[0013] Furthermore, the shell includes: an upper shell and a lower shell, the lower shell is detachably arranged on one side of the upper shell, the driving mechanism is placed in the lower shell, and the transmission mechanism, the adjustment mechanism and the lever mechanism are placed in the upper shell; the arrangement of this structure can reduce the manufacturing cost and effectively reduce the overall volume of the timer, the driving mechanism includes: a spring and a spring box, the spring is arranged in the spring box, one end of the spring is connected to the main shaft assembly, the spring box is arranged in the shell, the transmission mechanism includes a transmission gear group, the transmission gear group includes: a first gear assembly, a second gear assembly, a third gear assembly and a fourth gear assembly, the lower end of the first gear assembly is connected to the driving mechanism, the first gear assembly, the second gear assembly, the third gear assembly and the fourth gear assembly are meshed and connected in sequence, the lower end of the fourth gear assembly is connected to the adjustment mechanism, the spring is tightened by rotating the main shaft assembly to drive the timer for timing, and the arrangement of the transmission gear group can ensure that the internal structure has higher accuracy and effectively ensure the timing effect of the timer.

[0014] Furthermore, the upper shell includes: an upper cover and a lower cover, the upper cover is buckled with the lower cover, the driving mechanism, the transmission mechanism, the adjustment mechanism and the lever mechanism are all placed between the upper cover and the lower cover, a back bell is arranged above the upper cover, the bell hammer mechanism is placed in the back bell, the upper cover and the lower cover are convenient for disassembly and maintenance, and can make the overall structure more stable.

[0015] (III) Beneficial effects

[0016] The advantages of the mechanical timer of the present invention over the prior art are: it can achieve the effect of ringing a bell and cutting off the power when the timing ends, the internal structure cooperates tightly, a lever member is provided, and the rotation of the lever member is achieved by the cooperation of a cam and a protrusion on the lever member, the internal structure is reasonably arranged, and the functionality of the timer is stronger; the timer is safer to use, and the time of the timer can be quickly adjusted during mass production, and the operation is convenient; an adjustment block is provided, and the center distance of the balance wheel assembly and the escape wheel is changed by rotating the adjustment block to meet different timing requirements; the internal structure occupies less space, and the overall structure is more reasonably arranged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A cross-sectional view of a mechanical timer of the present invention;

[0018] Figure 2 A top view of a mechanical timer of the present invention with the upper cover removed;

[0019] Figure 3 A top view of a mechanical timer of the present invention without a back bell;

[0020] Figure 4 It is an enlarged view of A of a mechanical timer of the present invention;

[0021] Figure 5 It is an enlarged view of B of a mechanical timer of the present invention;

[0022] Among them: 1 is the housing, 101 is the upper cover, 102 is the lower cover, 2 is the main shaft assembly, 3 is the driving mechanism, 301 is the mainspring, 302 is the mainspring box, 4 is the transmission mechanism, 401 is the transmission gear set, 411 is the first gear assembly, 421 is the second gear assembly, 431 is the third gear assembly, 441 is the fourth gear assembly, 5 is the adjustment mechanism, 501 is the escape wheel, 502 is the balance wheel assembly, 503 is the adjustment block, 513 is the adjustment part , 523 is a mounting portion, 6 is a lever mechanism, 601 is a lever member, 611 is a first contact portion, 621 is a second contact portion, 631 is a first protrusion, 641 is a second protrusion, 7 is a bell hammer mechanism, 701 is a hammer, 702 is a back bell, 8 is a mounting groove, 9 is a mounting hole, 1001 is a moving reed, 1002 is a static reed, 11 is a through hole, 12 is a groove, 1301 is an upper shell, 1302 is a lower shell, and 14 is a cam. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] See also Figure 1 to Figure 5 A mechanical timer comprises: a housing 1 and a main shaft assembly 2, a driving mechanism 3, a transmission mechanism 4, an adjusting mechanism 5 and a lever mechanism 6 respectively arranged in the housing 1, the main shaft assembly 2 drives the driving mechanism 3, the adjusting mechanism 5 is connected with the transmission mechanism 4, the transmission mechanism 4 and the adjusting mechanism 5 control the rotation of the main shaft assembly 2, and the lever mechanism 6 cooperates with the main shaft assembly 2 and the bell hammer mechanism 7 on the housing 1 respectively through a lever member 601 arranged in the housing 1, specifically: the main shaft assembly 2 is rotated to tighten the mainspring 301 on the driving mechanism 3, and the transmission mechanism 4 is transmitted to the mainspring 301 through the adjusting mechanism 5 for slow relaxation, thereby realizing the timing effect of the main shaft assembly 2, and the lever mechanism 6 completes the bell ringing and power-off effects, the overall structure is simple, and the internal structure is reasonably arranged.

[0025] See also Figure 1 and Figure 4The adjusting mechanism 5 includes: an escape wheel 501 and a balance assembly 502. The escape wheel 501 is connected to the transmission mechanism 4. In the present embodiment, the escape wheel 501 is a ratchet, and the balance assembly 502 is placed in the housing 1. The adjusting mechanism 5 also includes an adjusting block 503 placed on the housing 1 for adjusting the balance assembly 502. One end of the adjusting block 503 is connected to the balance assembly 502. The adjusting block 503 includes: an adjusting portion 513 and a mounting portion 523. The adjusting portion 513 is arranged at one end of the adjusting block 503 to cooperate with the balance assembly 502. The adjusting block 503 is arranged on the housing 1 through the mounting portion. Specifically: the spindle assembly 2 is rotated so that the emission in the driving mechanism 3 is released. The mainspring 301 is wound up, and the escape wheel 501 is driven to rotate by the mainspring 301. Since the mainspring 301 is wound up, the rotation speed of the transmission gear set 401 is faster. The setting of the balance assembly 502 can limit the speed of the escape wheel 501. The center distance between the balance assembly 502 and the escape wheel 501 is changed by rotating the adjusting block 503, thereby limiting the rotation of the transmission gear set 401 to achieve different timing requirements. The overall structure is reasonably set, and the user operation is simple. The rotation of the adjusting block 503 is achieved through the setting of the mounting portion 523, thereby achieving the adjustment setting of the balance assembly 502. The setting of the adjusting block 503 occupies a small space, and the overall structure is simple.

[0026] See also Figure 1 , Figure 2 and Figure 4 The housing 1 is provided with a mounting groove 8, one end of the adjusting block 503 is rotatably arranged in the mounting groove 8, the adjusting block 503 is eccentrically provided with a mounting hole 9, one end of the balance wheel assembly 502 is arranged in the mounting hole 9 through a rotating shaft. Specifically, the setting of the mounting hole 9 can limit and fix the rotating shaft of the balance wheel assembly 502, and the rotation adjustment setting of the balance wheel assembly 502 can be realized through the mounting hole 9 by rotating the adjusting block 503, thereby changing the center distance between the balance wheel assembly 502 and the escape wheel 501, and realizing the time adjustment effect.

[0027] See also Figure 1 , Figure 3 and Figure 5 The lever member 601 includes: a first contact portion 611 and a second contact portion 621. The upper end surface of the second contact portion 621 is higher than the first contact portion 611. The first contact portion 611 contacts and cooperates with the main shaft assembly 2; the second contact portion 621 cooperates with the hammer 701 of the bell hammer mechanism 7. The hammer 701 is rotatably arranged on the shell 1. A through hole 11 is opened on the shell 1. The upper end of the second contact portion 621 passes through the second contact portion 621. Specifically, the first contact portion 611 is arranged below the second contact portion 621. The first contact portion 611 cooperates with the main shaft assembly 2 and the reed, and the second contact portion 621 cooperates with the bell hammer mechanism 7. The overall structure is more reasonably arranged.

[0028] See also Figure 2 , Figure 3 and Figure 5 A movable spring piece 1001 and a stationary spring piece 1002 are provided on one side of the housing 1, a first protrusion 631 is provided on the side of the lower end of the lever member 601 facing the spindle assembly 2, and the first protrusion 631 cooperates with the spindle assembly 2. A cam 14 is provided in the housing 1, and the cam 14 is provided at one end of the spindle assembly 2. A groove 12 is provided on the edge of the cam 14, and the first protrusion 631 cooperates with the groove 12 on the cam 14. A second protrusion 641 is provided on the side of the lever member 601 away from the spindle assembly 2, and the second protrusion 641 cooperates with one side of the movable spring piece 1001. Specifically, : The first protrusion 631 is matched with the groove 12 on one side of the cam 14. When the cam 14 rotates, the first protrusion 631 falls into the groove 12. Under the elastic action of the spring leaf, the lever member 601 makes the first protrusion 631 abut against the groove 12, and the movable spring leaf 1001 and the static spring leaf 1002 are disconnected. At the same time, the second contact portion 641 at the upper end of the lever member 601 touches the bell hammer mechanism 7 to ring the bell; when the first protrusion 631 is separated from the groove 12, one end of the lever member 601 presses down the spring leaf, so that the movable spring leaf 1001 and the static spring leaf 1002 are in contact to achieve the timing effect.

[0029] See also Figure 1 , Figure 3 and Figure 5 One end of the lever member 601 is rotatably arranged in the housing 1, the upper end of the lever member 601 cooperates with the bell hammer mechanism 7, and the lower end of the lever member 601 cooperates with the main shaft assembly 2. Specifically: the driving mechanism 3 drives the main shaft assembly 2 to rotate, and the cam 14 on the main shaft assembly 2 rotates to make the edge of the main shaft assembly 2 cooperate with the lever member 601. The groove 12 set on the cam 14 can cooperate with the first protrusion 631 on the lever member 601 to achieve cooperation with the bell hammer mechanism 7 and the reed. The overall structure is simple and the use effect is better.

[0030] See also Figure 1 and Figure 2The housing 1 includes: an upper housing 1301 and a lower housing 1302, the lower housing 1302 is detachably arranged on one side of the upper housing 1301, the driving mechanism 3 is arranged in the lower housing 1302, the transmission mechanism 4, the adjustment mechanism 5 and the lever mechanism 6 are arranged in the upper housing 1301, in this embodiment, the housing 1 is made of high-temperature nylon material, the driving mechanism 3 includes: a spring 301 and a spring box 302, the spring 301 is arranged in the spring box 302, one end of the spring 301 is connected to the main shaft assembly 2, the spring box 302 is arranged in the housing 1, the transmission mechanism 4 includes a transmission gear set 401, and the transmission gear set 401 includes: a first gear assembly 411, a second gear assembly 421, a third gear assembly 431 and a fourth gear assembly 44 1, the lower end of the first gear assembly 411 is connected to the driving mechanism 3, the first gear assembly 411, the second gear assembly 421, the third gear assembly 431 and the fourth gear assembly 441 are meshed and connected in sequence, the lower end of the fourth gear assembly 441 is connected to the adjusting mechanism 5, the lower end of the first gear assembly 411 is arranged in the spring box 302 and connected to the spring 301, one end of the spring 301 is connected to the main shaft assembly 2, the lower end of the second gear assembly 421 is meshed with the upper end of the first gear assembly 411, the upper end of the third gear assembly 431 is meshed with the upper end of the second gear assembly 421, and the upper end of the fourth gear assembly 441 is meshed with the lower end of the third gear assembly 431. The overall structure is reasonably arranged, the transmission accuracy is high, and the timing effect is better.

[0031] See also Figure 1 The upper shell 1301 includes: an upper cover 101 and a lower cover 102, the upper cover 101 and the lower cover 102 are buckled together, the driving mechanism 3, the transmission mechanism 4, the adjustment mechanism 5 and the lever mechanism 6 are all placed between the upper cover 101 and the lower cover 102, a back bell 702 is arranged above the upper cover 101, and the bell hammer mechanism 7 is placed in the back bell 702. The upper cover 101 and the lower cover 102 are buckled together for easy disassembly and maintenance, and the overall structure is more stable.

[0032] The mechanical timer of this embodiment is provided with a lever member, and the cam cooperates with the raised part on the lever member to realize the rotation of the lever member. The internal structure is reasonably arranged, the functionality of the timer is stronger, and the effect of ringing and powering off at the end of the timing can be achieved, and the internal structure cooperates tightly; by providing an adjustment block, the center distance of the balance wheel assembly and the escape wheel can be changed by rotating the adjustment block to meet different timing requirements, the internal structure occupies less space, the overall structure is more reasonably arranged, the timer is safer to use, and the time of the timer can be quickly adjusted, and the operation is convenient.

[0033] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A mechanical timer, characterized in that: include: A housing (1), and a spindle assembly (2), a driving mechanism (3), a transmission mechanism (4), an adjusting mechanism (5), and a lever mechanism (6) respectively disposed in the housing (1), wherein the spindle assembly (2) drives the driving mechanism (3), the adjusting mechanism (5) is connected to the transmission mechanism (4), the transmission mechanism (4) and the adjusting mechanism (5) control the rotation of the spindle assembly (2), and the lever mechanism (6) cooperates with the spindle assembly (2) and a bell hammer mechanism (7) on the housing (1) respectively through a lever member (601) disposed in the housing (1); The regulating mechanism (5) comprises: an escape wheel (501) and a balance wheel assembly (502), wherein the escape wheel (501) is connected to the transmission mechanism (4), and the balance wheel assembly (502) is disposed in the housing (1); the regulating mechanism (5) further comprises an regulating block (503) disposed on the housing (1) and used for regulating the balance wheel assembly (502), wherein one end of the regulating block (503) is connected to the balance wheel assembly (502); The adjusting block (503) comprises: an adjusting portion (513) and a mounting portion (523); the adjusting portion (513) is arranged at one end of the adjusting block (503) to cooperate with the balance wheel assembly (502); and the adjusting block (503) is arranged on the housing (1) via the mounting portion; The housing (1) is provided with a mounting groove (8), one end of the adjustment block (503) is rotatably arranged in the mounting groove (8), the adjustment block (503) is eccentrically provided with a mounting hole (9), and one end of the balance wheel assembly (502) is arranged in the mounting hole (9) via a rotating shaft; One end of the lever member (601) is rotatably disposed in the housing (1), the upper end of the lever member (601) cooperates with the bell hammer mechanism (7), and the lower end of the lever member (601) cooperates with the main shaft assembly (2); The lever member (601) comprises: a first contact portion (611) and a second contact portion (621); the upper end surface of the second contact portion (621) is higher than the first contact portion (611); the first contact portion (611) contacts and cooperates with the spindle assembly (2); the second contact portion (621) cooperates with a hammer (701) of the bell hammer mechanism (7); the hammer (701) is rotatably disposed on the housing (1); a through hole (11) is provided on the housing (1); the upper end of the second contact portion (621) passes through the second contact portion (621); A movable spring (1001) and a stationary spring (1002) are provided on one side of the housing (1); a first protrusion (631) is provided on the lower end of the lever member (601) facing the side of the spindle assembly (2); the first protrusion (631) cooperates with the spindle assembly (2); a cam (14) is provided in the housing (1); the cam (14) is provided at one end of the spindle assembly (2); a groove (12) is provided on the edge of the cam (14); the first protrusion (631) cooperates with the groove (12) on the cam (14); a second protrusion (641) is provided on the side of the lever member (601) away from the spindle assembly (2); the second protrusion (641) cooperates with one side of the movable spring (1001).

2. The mechanical timer according to claim 1, characterized in that: The housing (1) comprises: an upper housing (1301) and a lower housing (1302); the lower housing (1302) is detachably arranged on one side of the upper housing (1301); the driving mechanism (3) is arranged in the lower housing (1302); the transmission mechanism (4), the adjustment mechanism (5) and the lever mechanism (6) are arranged in the upper housing (1301); the driving mechanism (3) comprises: a spring (301) and a spring box (302); the spring (301) is arranged in the spring box (302); one end of the spring (301) is connected to a main shaft assembly (2); and the spring box (302) is arranged in the housing (1).

3. The mechanical timer according to claim 1, characterized in that: The transmission mechanism (4) comprises a transmission gear set (401), the transmission gear set (401) comprising: a first gear assembly (411), a second gear assembly (421), a third gear assembly (431) and a fourth gear assembly (441), the lower end of the first gear assembly (411) being connected to the driving mechanism (3), the first gear assembly (411), the second gear assembly (421), the third gear assembly (431) and the fourth gear assembly (441) being meshed and connected in sequence, and the lower end of the fourth gear assembly (441) being connected to the adjusting mechanism (5).

4. The mechanical timer according to claim 2, characterized in that: The upper shell (1301) comprises: an upper cover (101) and a lower cover (102); the upper cover (101) is buckled with the lower cover (102); the driving mechanism (3), the transmission mechanism (4), the adjustment mechanism (5) and the lever mechanism (6) are all arranged between the upper cover (101) and the lower cover (102); a back bell (702) is arranged above the upper cover (101); and the bell hammer mechanism (7) is arranged inside the back bell (702).

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