Novel anti-overtwist limiting structure and timer
By adopting a new anti-torsion limiting structure in the timer, and using the coordination of limiting slots, limiting columns, convex ribs and stops to limit the rotation angle, the existing timer's limiting structure is solved, the safety protection of the movement and the reduction of the timer's volume are achieved, and the service life is extended.
Patent Information
- Application Number
- CN202421349025.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-13
AI Technical Summary
The limiting structure of the existing timer has problems such as complex structure, large volume and poor strength, which leads to the movement being easily damaged.
The new anti-torsion limiting structure is adopted, including a rotating plate, a limiting plate, a base and a rotating shaft. Through the coordination of the limiting groove and the limiting column and the coupling of the convex ribs and the stopper, the rotation angle is limited, excessive rotation is prevented, and the movement is protected.
It effectively prevents excessive rotation and damage of the timer movement, provides a large limit torque, is compact in structure and small in size, extending the service life of the timer.
Smart Images
Figure CN222545632U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a timing device, in particular to a novel over-torque prevention limit structure and a timer. Background Art
[0002] The method of using the timer is: place the timer on a table or adsorb it on a wall, electrical appliance, or furniture surface, rotate the timer housing or knob to make the indicator piece turn to the countdown, and the countdown begins. When the set time is reached, the timer makes a sound to remind people that the user has reached the scheduled time.
[0003] The defect of the existing structure is that the working range of the timer is 0-60 minutes, and the rotation angle of the movement shaft is 0-360 degrees. If the user rotates excessively during use (setting the time clockwise, rotating more than 360 degrees, or returning to zero counterclockwise, rotating to the left of the 0 scale), it is very easy to cause damage to the movement.
[0004] There is also a limit structure set in the timer to control the rotation range of the movement shaft, but the existing limit structure has the defects of complex structure, large occupied volume and poor strength, and needs further improvement. Utility Model Content
[0005] The purpose of the utility model is to overcome the deficiencies in the above-mentioned background technology and provide a novel anti-over-torque limit structure and a timer to reduce the size of the timer and extend the service life of the timer.
[0006] The technical solution of the utility model is:
[0007] The novel over-torque prevention and limiting structure is characterized in that: the structure comprises a coaxially arranged rotating piece, a limiting piece, a base, and a rotating shaft; the rotating piece can be rotatably positioned on the base, and the limiting piece can be rotatably positioned between the rotating piece and the base;
[0008] The rotating plate is provided with convex ribs; the limiting plate is provided with a plurality of arc-shaped limiting grooves and blocks matching the convex ribs; the base is provided with limiting columns matching the limiting grooves; the rotating shaft is driven by the movement, and the rotating shaft passes through the rotating plate, the limiting plate, the base and is also connected to the rotating plate.
[0009] The limiting grooves and limiting columns are arranged around the central axis; the curvatures of the limiting grooves are equal.
[0010] The convex rib is formed on the edge of the rotating piece and protrudes from the reverse side of the rotating piece; the stopper is formed on the edge of the limiting piece.
[0011] A plurality of mounting grooves are arranged on both the front and back sides of the rotating plate, and a plurality of balls are arranged in each mounting groove.
[0012] The front end of the rotating shaft is a front positioning column in an oval shape, and the rear end is an I-shaped rear positioning column.
[0013] The sum of the curvatures of the convex rib and the stopper is equal to the swing curvature of the limiting piece.
[0014] A timer with a novel anti-over-torque limit structure comprises a housing, an indicator color sheet, and a movement; the housing comprises a front cover and a rear cover; the characteristics are: the limit structure is arranged between the front cover and the movement; the base is the top cover of the movement; the rotating shaft connects the knob and the output shaft of the movement.
[0015] It also includes a circuit board, a battery, a buzzer, and a button; the movement is a quartz movement.
[0016] The beneficial effects of the utility model are:
[0017] The utility model limits the rotation angle by the cooperation between the limit groove and the limit column and the cooperation between the convex rib and the stop block. When the rotation reaches the limit position, the rotating piece cannot continue to rotate due to the obstruction of the above structure, which plays a limiting role and protects the safety of the movement. At the same time, the layout of the utility model is more reasonable, the structure is compact and the thickness is small, the manufacturing cost is low, the volume of the timer can be greatly reduced, and the limit structure can also provide a large limit torque, the force is stable, and it is strong and durable, which effectively extends the service life of the timer. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a three-dimensional structural schematic diagram of the rotating piece of the limiting structure.
[0019] Figure 2 It is a schematic diagram of the main structure of the rotating piece of the limiting structure.
[0020] Figure 3 It is a schematic diagram of the right view of the rotating piece of the limiting structure.
[0021] Figure 4 It is a schematic diagram of the rear view structure of the rotating piece of the limiting structure.
[0022] Figure 5 It is a schematic diagram of the main structure of the limiting piece of the limiting structure.
[0023] Figure 6 It is a three-dimensional structural schematic diagram of the base of the limiting structure.
[0024] Figure 7 It is one of the three-dimensional structural diagrams of the limiting structure (zero scale).
[0025] Figure 8 This is the second three-dimensional structural diagram of the limit structure (full scale).
[0026] Fig. 9It is one of the main view structural diagrams of the limiting structure (zero scale).
[0027] Fig.10 This is the second main view structural diagram of the limit structure (full scale).
[0028] Fig.11 This is an exploded view of the timer.
[0029] Fig.12 It is a schematic diagram of the main structure of the timer.
[0030] Fig.13 It is a top view schematic diagram of the timer structure.
[0031] Reference numerals:
[0032] Rotating piece 1, rib 1.1, mounting groove 1.2, ball 1.3, limiting piece 2, limiting groove 2.1, block 2.2, base 3, limiting column 3.1, rotating shaft 4, front positioning column 4.1, rear positioning column 4.2, front cover 11, rear cover 12, indicating color piece 13, movement 14, circuit board 15, battery 16, buzzer 17, button 18, scale piece 19, lens 20, knob 21, magnet 22, central axis A. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0034] like Figure 1 As shown, the novel anti-over-torque limiting structure includes a rotating plate 1, a limiting plate 2, a base 3, and a rotating shaft 4.
[0035] The rotating plate, the limiting plate, the base and the rotating shaft are arranged coaxially, and the axis is the central axis A ( Figure 7 This axis is also the central axis of the movement.
[0036] like Fig.11 As shown, the rotating piece, the limiting piece, and the base are arranged in sequence from front to back (the front is the front of the timer, and the back is the back of the timer). The rotating piece can be rotatably positioned on the base around the central axis, the limiting piece is arranged between the rotating piece and the base, and the limiting piece can be rotatably positioned between the rotating piece and the base around the central axis.
[0037] The rotating shaft axially passes through the rotating plate, the limiting plate and the base, and the rotating shaft is also fixed to the rotating plate. Figure 3As shown, a front positioning column 4.1 is provided at the front end of the rotating shaft, and the front positioning column is oval in shape. The knob of the timer is plugged into the front positioning column. A rear positioning column 4.2 is provided at the rear end of the rotating shaft, and the rear positioning column is I-shaped. The rear positioning column passes through the limit plate and the base and then plugs into the output shaft of the movement.
[0038] When the timer is working, the output shaft of the movement drives the rotating shaft to rotate, and the rotating shaft then drives the rotating piece to rotate, or, after setting the countdown time, the rotating piece is actively rotated to drive the output shaft of the movement to rotate, and the rotation angle of the rotating piece (output shaft of the movement) is controlled by the cooperation between the rotating piece, the limit piece and the base to avoid damage to the movement. The rotation angle of the rotating piece is preferably 360 degrees, and can be greater than 360 degrees or less than 360 degrees according to actual use.
[0039] like Figure 5 As shown, the limit plate is provided with a stopper 2.2 and a plurality of limit slots 2.1. The stopper is formed on the edge of the limit plate. The stopper extends from the edge of the limit plate. The limit slots are arranged around the central axis, the limit slots are curved in an arc shape, and the curvature of each limit slot is equal. Figure 5 As shown, the limiting grooves are evenly arranged around the central axis, the radius of each limiting groove (the distance between the limiting groove and the central axis) is equal, and the number of limiting grooves is three. The number of the limiting grooves can also be two, four or more, depending on the actual situation.
[0040] like Figure 6 As shown, the base is provided with a limiting column 3.1 that cooperates with each limiting groove. The limiting column protrudes from the front side of the base (the side facing the limiting plate) and is arranged around the central axis. The limiting column also extends into the limiting groove. The number of the limiting columns matches the number of the limiting grooves. The spacing between each limiting column and the central axis is equal. The limiting columns are evenly arranged around the central axis. The number of limiting columns is three. The base is usually used as the top cover of the movement.
[0041] like Figures 1 to 4 As shown, the rotating piece is provided with a convex rib 1.1 that cooperates with the stopper. The convex rib is formed on the edge of the rotating piece, and the convex rib protrudes from the reverse side of the rotating piece (the side facing the limit piece). The front and back sides of the rotating piece are provided with a plurality of mounting grooves 1.2, and a plurality of balls 1.3 are arranged in each mounting groove.
[0042] All the balls arranged in the mounting groove on the front side of the rotating piece are arranged around the central axis, and these balls are rollingly matched with the front cover of the timer, and these balls also roll along the same circumferential direction. Similarly, all the balls arranged in the mounting groove on the back side of the rotating piece are arranged around the central axis, and these balls are rollingly matched with the stopper, and these balls also roll along the same circumferential direction. Since both sides of the rotating piece are positioned by the balls, the shaft is not easy to shake when rotating, ensuring the stable rotation of the knob.
[0043] Since the rotating plate is connected to the output shaft of the movement through a rotating shaft, and the limit plate is located between the rotating plate and the base, the limit column and the limit groove guide the rotation of the limit plate to control the rotation angle of the limit plate, and then the limit plate (convex rib and block) further controls the rotation angle of the rotating plate, thereby preventing over-torque.
[0044] like Figure 7 and Fig. 9 As shown, the limiting structure is in a stationary state, and the rotating piece and the limiting piece are in the extreme position of counterclockwise rotation ( Fig. 9 The timer indicator is at the zero scale position.
[0045] like Figure 8 and Fig.10 As shown, the limit structure is in the working state, the rotating plate rotates 360 degrees, and the rotating plate and the limit plate are at the extreme position of clockwise rotation ( Fig.10 The timer indicator is at the full scale position.
[0046] To ensure that the rotating piece can rotate exactly 360 degrees, the sum of the arcs of the rib and the block is equal to the swing arc of the limit piece. Figure 7 As shown in FIG. 1 , the right side of the rib presses against the left side of the stopper. Figure 8 As shown, the stopper swings a certain angle, and the convex rib rotates 360 degrees and stays at the same position, with the left side of the convex rib supporting the right side of the stopper.
[0047] The rotation angle of the rotating piece can be adjusted by changing the length of the limiting groove, the length of the convex rib and the length of the stopper.
[0048] The advantages of this limiting structure are:
[0049] 1. The rotation angle is limited by the cooperation between the limit groove and the limit column, and the cooperation between the convex rib and the stopper to prevent excessive rotation and protect the movement;
[0050] 2. The limit grooves, limit columns, convex ribs and stoppers are far away from the center axis, which can provide a larger limit torque. The overall structure is stable and durable;
[0051] 3. The rotating piece, the limiting piece and the base are all flat structures with small overall thickness, simple structure and low manufacturing cost, which can greatly reduce the size of the timer.
[0052] The utility model also provides a timer using the novel anti-over-torque limit structure, comprising a housing, an indicator color sheet 13, and a movement 14. The housing comprises a front cover 11 and a rear cover 12. The limit structure is arranged between the front cover and the movement, the base is the top cover of the movement, and the two ends of the rotating shaft are respectively connected to the knob 21 and the output shaft of the movement.
[0053] The movement is of prior art and can be a mechanical movement or a quartz movement. The housing is also provided with a circuit board 15, a battery 16, a buzzer 17, and a button 18. The front cover is also provided with a scale sheet 19 and a lens 20. The indicator color sheet is also connected to the shaft. When the knob is turned, the shaft will also cause the indicator color sheet to extend out of the scale sheet to display the remaining countdown time. The back of the rear cover is also provided with a magnet 22.
[0054] The preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.
Claims
1. New anti-over-torque limit structure, characterized by: The structure comprises a coaxially arranged rotating piece (1), a limiting piece (2), a base (3), and a rotating shaft (4); the rotating piece is rotatably positioned on the base, and the limiting piece is rotatably positioned between the rotating piece and the base; The rotating plate is provided with a convex rib (1.1); the limiting plate is provided with a plurality of arc-shaped limiting grooves (2.1) and a stopper (2.2) matching the convex rib; the base is provided with a limiting column (3.1) matching each limiting groove; the rotating shaft is driven by the movement, and the rotating shaft passes through the rotating plate, the limiting plate, the base and is also connected to the rotating plate.
2. The novel over-torque prevention limiting structure according to claim 1 is characterized in that: The limiting grooves and limiting columns are arranged around the central axis; the curvatures of the limiting grooves are equal.
3. The novel over-torque prevention limiting structure according to claim 2 is characterized in that: The convex rib is formed on the edge of the rotating piece and protrudes from the reverse side of the rotating piece; the stopper is formed on the edge of the limiting piece.
4. The novel over-torque prevention limiting structure according to claim 3 is characterized in that: A plurality of mounting grooves (1.2) are provided on both the front and back sides of the rotating plate, and a plurality of balls (1.3) are arranged in each mounting groove.
5. The novel over-torque prevention limiting structure according to claim 4 is characterized in that: The front end of the rotating shaft is a front positioning column (4.1) in an oval shape, and the rear end is an I-shaped rear positioning column (4.2).
6. The novel over-torque prevention and limiting structure according to claim 5 is characterized in that: The sum of the curvatures of the convex rib and the stopper is equal to the swing curvature of the limiting piece.
7. A timer with a novel anti-over-torque limit structure according to any one of claims 1 to 6, comprising a housing, a color indicator sheet (13), and a movement (14); the housing comprising a front cover (11) and a rear cover (12); characterized in that: The limiting structure is arranged between the front cover and the movement; the base is the top cover of the movement; and the rotating shaft connects the knob (21) and the output shaft of the movement.
8. The timer according to claim 7, characterized in that: It also includes a circuit board (15), a battery (16), a buzzer (17), and a button (18); the movement is a quartz movement.