Timer capable of preventing reverse rotation

Abstract

The timer comprises a front shell and a rear shell, a circuit board, a clock movement and a timing knob are arranged between the front shell and the rear shell, a top button is arranged on the top surface of the rear shell, and an anti-reverse structure is arranged on the inner side of the front shell; a movement switch is arranged on the front shell; a circular hole is formed in the side face of the movement switch, a limiting abutting block is arranged on the movement switch, and an anti-reverse-rotation abutting block is integrally formed on the edge of the anti-reverse-rotation structure. In the initial state, the anti-reverse-rotation abutting block abuts against the limiting abutting block to be limited. The rotary knob is reasonable in structural arrangement, the limiting abutting block is arranged on the edge of the limiting circular ring, the limiting abutting block is matched with the anti-reverse-rotation abutting block on the anti-reverse-rotation structure, limiting is carried out through the limiting abutting block and the anti-reverse-rotation abutting block, reverse rotation operation of an external rotary knob in the initial state can be easily achieved, applicability is high, and practicability is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of timers, and in particular relates to a timer capable of preventing reverse rotation. Background Art

[0002] A timer is a special type of clock used to measure specific time intervals. It can be divided into two types based on the timing method. A timer that counts up from zero to measure the elapsed time is usually called a stopwatch, while a device that counts down from a specified time interval is usually called a timer. In terms of structure, there are mainly hardware timers and software timers. The more intuitive ones commonly used in life are hourglasses and countdown clocks.

[0003] The Chinese patent publication number is: CN201754216U, and the patent name is: A time display structure of a timer. The technical problem to be solved is that the display structure provided should be able to display time clearly and effectively, and has the characteristics of intuitive, vivid, clear and definite. The technical solution is: a time display structure of a pointer timer, including a rotating shaft, a dial, a thin sheet of scale plate, a thin sheet of indicator plate with a pointer, and a transparent shell or a transparent panel with a knob; a slit is provided on the scale plate, and the slit extends outward from the center hole of the scale plate along the radial direction to the edge of the scale plate, and the two edges on both sides of the slit diverge a certain distance in the axial direction of the rotating shaft; the indicator plate is fixed on the rotating shaft, and a groove corresponding to the slit is provided on the indicator plate, and the groove extends outward along the radial direction to the edge of the indicator plate, and the edges on both sides of the groove are also separated by a corresponding distance, and the tail end of the indicator plate can be rotatably inserted behind the dial.

[0004] Although it can meet the general usage requirements, its structure is relatively complicated, and it has no anti-reversal structure, and cannot effectively realize the reversal operation of the external knob in the initial state. Moreover, it needs to be equipped with an I-tube to be used with a positioning seat, and the positioning is achieved through the positioning plate on the positioning seat. The stability of use is limited, the disassembly and assembly operation is relatively inconvenient, and the applicability and practicality are limited. Summary of the invention

[0005] The utility model aims to provide a timer capable of preventing reverse rotation, which has a reasonable structure and is conducive to realizing reverse operation of an external knob in an initial state.

[0006] The technical solution to achieve the purpose of the utility model is a timer capable of anti-reversal, comprising a front housing and a rear housing, a circuit board, a clock movement and a timing knob are arranged between the front housing and the rear housing, a top button is arranged on the top surface of the rear housing, and an anti-reversal structure connected to the timing knob is arranged on the inner side of the front housing;

[0007] The front housing is provided with a movement switch, the movement switch is arranged at the edge of the anti-reversal structure and the movement switch is connected to the clock movement;

[0008] A limit stop block is provided on the movement switch, and an anti-reversal stop block is integrally formed at the edge of the anti-reversal structure;

[0009] In the initial state, the anti-reversal stopper abuts against the upper limit of the limit stopper.

[0010] Further preferably, the anti-reversal structure comprises a circular panel, a convex column integrally formed at the center of the outer side surface of the circular panel, and at least one limiting convex strip integrally formed on the outer wall of the convex column;

[0011] The anti-reversal stopper is fixed on the edge of the circular panel, and the timing knob is clamped on the convex column and limited by the limiting convex strip.

[0012] It is further preferred that: two limiting protrusions are arranged on the front housing;

[0013] The limiting stopper is located between two limiting convex points, and the limiting stopper is limited by the limiting convex points when rotating.

[0014] Further preferably, two retaining protrusions are arranged on the upper part of the inner wall of the rear housing, and the two retaining protrusions are symmetrically located on both sides of the top button;

[0015] The top button comprises a button and a pressing piece integrally formed on the bottom surface of the button and curved outward in an arc shape;

[0016] The pressing pieces are respectively in contact with the top surfaces of the positioning protrusions.

[0017] It is further preferred that: a dial is attached to the front side of the front housing.

[0018] It is further preferred that: the rear housing is usually provided with a button and a USB interface connected to the circuit board.

[0019] It is further preferred that: the width between the two limiting protrusions is greater than the width of the limiting stop.

[0020] The utility model has positive effects: the structure of the utility model is reasonably arranged, and a limit stop block is provided on the movement switch, which cooperates with the anti-reversal stop block on the anti-reversal structure, and the limit block and the anti-reversal stop block are used for limiting, and at the same time, there are two limit convex points on the front shell body, which can realize the limit of the switch position, which is conducive to realizing the reversal operation of the external knob in the initial state, and is also conducive to improving the stability of use, and has strong applicability and good practicality;

[0021] Moreover, a limit convex point is provided, and the width between the two limit convex points is greater than the width of the limit stop block, so that the limit stop block has a certain rotation space, which can compensate for the situation that the anti-reversal ring rotates less than 360 degrees, so that the timing knob can rotate 360 ​​degrees, ensuring the effectiveness and reliability of the timing, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the content of the utility model easier to understand, the utility model is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein:

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0025] Figure 3 This is a schematic diagram of the internal structure of the utility model when the front housing is removed and the device is rotated one full circle;

[0026] Figure 4 This is a schematic diagram of the internal structure of the utility model in an initial state when the front shell is removed;

[0027] Figure 5 It is a specific structural schematic diagram of the anti-reversal structure in the utility model;

[0028] Figure 6 It is a schematic diagram of the structure of the front housing and the movement switch in the utility model;

[0029] Figure 7 The three-state structure diagram of the movement switch of the utility model.

[0030] Figure numerals: front shell 1, rear shell 2, circuit board 3, clock movement 4, timing knob 5, top button 6, dial 7, button 8, USB interface 9, anti-reversal structure 10, circular panel 101, boss 102, limit convex strip 103, movement switch 11, limit convex point 12, stop convex piece 13, limit stop block 14, anti-reversal stop block 15. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Example

[0033] See Figures 1 to 7 As shown, a timer capable of preventing reverse rotation comprises a front housing 1 and a rear housing 2, a circuit board 3, a clock movement 4 and a timing knob 5 are arranged between the front housing and the rear housing, a top button 6 is arranged on the top surface of the rear housing, and in this embodiment, a dial 7 is attached to the front of the front housing. Meanwhile, in actual application, a button 8 and a USB interface 9 connected to the circuit board are usually arranged on the rear housing. And the front housing and the rear housing are mainly fixed by screws, and the above structures are conventional structures of the prior art, which are simply applied, so they are not recorded in detail.

[0034] An anti-reversal structure 10 connected to the timing knob is arranged on the inner side of the front shell; a movement switch 11 is arranged on the front shell body, and the movement switch is arranged at the edge of the anti-reversal structure and connected to the clock movement; the anti-reversal structure can prevent reversal in the initial state, and at the same time, during the rotation process, the movement switch can be reversed because it is far away from the anti-reversal structure.

[0035] The movement switch is provided with a limit stopper 14, and an anti-reversal stopper 15 is integrally formed at the edge of the anti-reversal structure;

[0036] Two limiting convex points 12 are arranged on the front housing; the limiting stopper is located between the two limiting convex points, and the limiting stopper is limited by the limiting convex points when rotating.

[0037] In the initial state, the anti-reversal abutment abuts against the upper limit of the limit abutment. At the same time, when the rotation has not reached 360 degrees, the anti-reversal abutment can drive the limit abutment to move at a small angle, so that it can reach a full 360 degrees, that is, a full circle.

[0038] The anti-reversal structure 10 includes a circular panel 101, a convex column 102 integrally formed at the center of the outer side surface of the circular panel, and at least one limiting convex strip 103 integrally formed on the outer wall of the convex column; the anti-reversal block is fixed on the edge of the circular panel, and the timing knob is clamped on the convex column and limited by the limiting convex strip.

[0039] Two abutting convex pieces 13 are arranged on the upper inner wall of the rear housing, and the two abutting convex pieces are symmetrically arranged on both sides of the top button; the top button includes a button and a pressing piece integrally formed on the bottom surface of the button and curved outward in an arc shape; the pressing pieces are respectively abutted against the top surface of the abutting convex pieces. In this embodiment, the above structure is adopted, and the pressing piece is used in conjunction with the pressing convex piece to increase the contact area and the key rebound force, which not only improves the convenience of installation, but also improves the feel of use.

[0040] like Figure 7As shown, the movement switch has three states, namely, anti-reverse state, intermediate reset state and compensation state when the timing rotates one circle, among which the intermediate reset state makes the movement move.

[0041] In this embodiment, the functions of the circular ring are specifically as follows: 1. When the user twists the timing knob, the anti-reversal structure is pushed to operate, causing the movement switch to operate and the clock movement to be powered on; 2. The anti-reversal structure cooperates with the limit stop block to enable the timing knob to complete a full circle of rotation and achieve angle compensation; 3. While completing the angle compensation in cooperation with the anti-reversal structure, the maximum rotation angle can only be 360 ​​degrees / circle.

[0042] The utility model has positive effects: the structure of the utility model is reasonably arranged, a limit ring is arranged in the circular hole of the movement switch, and a limit stop block is arranged on the edge of the limit ring, which cooperates with the anti-reversal stop block on the anti-reversal structure, and the limit stop block and the anti-reversal stop block are used to limit the position, which is conducive to realizing the reversal operation of the external knob in the initial state, and is also conducive to improving the stability of use, and has strong applicability and good practicality;

[0043] Moreover, a limit convex point is provided, and the width between the two limit convex points is greater than the width of the limit stop block, so that the limit stop block has a certain rotation space, which can compensate for the situation that the anti-reversal ring rotates less than 360 degrees, so that the timing knob can rotate 360 ​​degrees, ensuring the effectiveness and reliability of the timing, and has strong practicality.

[0044] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification can also be directly processed according to existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0045] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the present invention still belong to the protection scope of the present invention.

Claims

1. A timer capable of preventing reverse rotation, comprising a front housing and a rear housing, wherein a circuit board, a clock movement and a timing knob are arranged between the front housing and the rear housing, and a top button is arranged on the top surface of the rear housing, characterized in that: An anti-reversal structure connected to the timing knob is provided on the inner side of the front shell; The front housing is provided with a movement switch, the movement switch is arranged at the edge of the anti-reversal structure and the movement switch is connected to the clock movement; A limit stop block is provided on the movement switch, and an anti-reversal stop block is integrally formed at the edge of the anti-reversal structure; In the initial state, the anti-reversal stopper abuts against the upper limit of the limit stopper.

2. The anti-reversal timer according to claim 1, characterized in that: The anti-reversal structure comprises a circular panel, a convex column integrally formed at the center of the outer side surface of the circular panel, and at least one limiting convex strip integrally formed on the outer wall of the convex column; The anti-reversal stopper is fixed on the edge of the circular panel, and the timing knob is clamped on the convex column and limited by the limiting convex strip.

3. The anti-reversal timer according to claim 2, characterized in that: Two retaining protrusions are arranged on the upper part of the inner wall of the rear housing, and the two retaining protrusions are symmetrically located on both sides of the top button; The top button comprises a button and a pressing piece integrally formed on the bottom surface of the button and curved outward in an arc shape; The pressing pieces are respectively in contact with the top surfaces of the positioning protrusions.

4. The anti-reversal timer according to claim 3, characterized in that: The front housing is provided with two limiting protrusions; The limit stop block is located between two limit protrusions, and the limit stop block is limited by the limit protrusions when rotating.

5. The anti-reversal timer according to claim 4, characterized in that: A dial is attached to the front side of the front shell.

6. A timer capable of preventing reverse rotation according to any one of claims 1 to 4, characterized in that: The rear housing is usually provided with buttons and a USB interface connected to the circuit board.

7. The anti-reversal timer according to claim 4, characterized in that: The width between the two limiting protrusions is greater than the width of the limiting stop.

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