Automatic tool retracting structure of can opener

Abstract

The utility model discloses an automatic tool retracting structure of a can opener, which belongs to the technical field of can openers and comprises a fixed seat, and a cutting wheel and a cutting knife are movably arranged on the fixed seat. The idle wheel is rotatably arranged on the fixed seat; the eccentric wheel is rotatably arranged on the fixed seat and is in transmission connection with the idle wheel, and the eccentric wheel is in transmission connection with the cutting knife; the pressure spring is arranged on the eccentric wheel, and the pressure spring is used for driving the eccentric wheel to rotate reversely, so that the distance between the cutting wheel and the cutting knife is increased; and the blocking piece is arranged on the fixing base, located on one side of the eccentric wheel and used for abutting against the compression spring. Through the cooperative operation of the eccentric wheel, the idle wheel and the pressure spring, the cutting wheel and the cutting knife can finish the action of automatically retracting, so that the energy consumption is reduced, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of can openers, in particular to an automatic knife retracting structure of a can opener. Background Art

[0002] An electric can opener is an electrically powered device used to easily and quickly open various sealed cans or bottles, usually using electricity to rotate a cutting knife or blade to help the user easily open the lid of the can or bottle.

[0003] In the prior art, the knife retraction mechanism of the automatic can opener encounters considerable resistance during the can opening process, which not only increases the energy consumption of the electric can opener, but also may cause the knife retraction mechanism to malfunction after a period of time, thereby affecting the normal operation of the can opener and reducing its service life. Utility Model Content

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an automatic knife retraction structure for a can opener, which can reduce energy consumption and ensure that the device can operate effectively for a long time.

[0005] According to the automatic knife retracting structure of the can opener according to the embodiment of the utility model, it includes a fixed seat, on which a cutting wheel and a cutting knife are movably arranged; an idler wheel, which is rotatably arranged on the fixed seat; an eccentric wheel, which is rotatably arranged on the fixed seat, the eccentric wheel is transmission-connected with the idler wheel, and the eccentric wheel is transmission-connected with the cutting knife; a compression spring, which is arranged on the eccentric wheel, and is used to drive the eccentric wheel to rotate in the opposite direction to increase the distance between the cutting wheel and the cutting knife; a blocking member, which is arranged on the fixed seat, the blocking member is located on one side of the eccentric wheel, and the blocking member is used to resist the compression spring.

[0006] The automatic knife retracting structure of the can opener according to the embodiment of the utility model has at least the following beneficial effects: in the can opening and cutting state, the idler wheel rotates to drive the idler wheel to drive the eccentric wheel to rotate synchronously, the eccentric wheel drives the compression spring to abut against the fixed seat under the drive of the idler wheel, and at the same time makes the cutting knife move in the direction close to the cutting wheel, in the knife retracting state, the compression spring on the eccentric wheel releases the elastic force to make the eccentric wheel rotate in the opposite direction, the eccentric wheel meshes with the idler wheel and drives the idler wheel to reverse, and the cutting knife opens the gap between the cutting wheel and the cutting wheel under the drive of the eccentric wheel, thereby completing the knife retracting action. Therefore, through the coordinated operation of the eccentric wheel, the idler wheel and the compression spring, the cutting wheel and the cutting knife can complete the automatic knife retracting action, thereby reducing energy consumption, improving energy utilization efficiency, and extending the service life of the equipment.

[0007] According to some embodiments of the present invention, the compression spring extends along a tangential direction of the edge of the eccentric wheel.

[0008] According to some embodiments of the utility model, the blocking member is provided with a bending portion, which is located on a side of the blocking member close to the eccentric wheel. The blocking member is bent toward a side close to the compression spring through the bending portion, and the bending portion is used to prevent the compression spring and the blocking member from slipping off.

[0009] According to some embodiments of the utility model, a driving wheel is further included. The driving wheel is rotatably arranged on a fixed seat, the driving wheel is transmission-connected with the cutting wheel, and the driving wheel is used to drive the cutting wheel to rotate.

[0010] According to some embodiments of the utility model, a slide plate is also included. The slide plate is slidably arranged on a fixed seat. The slide plate is transmission-connected to the eccentric wheel. The cutting knife is rotatably arranged on the slide plate. The eccentric wheel drives the cutting knife away from and close to the cutting wheel through the slide plate.

[0011] According to some embodiments of the present utility model, the eccentric wheel and the slide plate are transmission-connected via a double-ring plate, and the double-ring plate converts the rotational motion of the eccentric wheel into the linear motion of the slide plate.

[0012] According to some embodiments of the present invention, the cutting knife is arranged on the slide plate at an angle.

[0013] According to some embodiments of the present invention, a transmission mechanism is further included, and the transmission mechanism is transmission-connected to the idler wheel.

[0014] According to some embodiments of the present invention, the transmission mechanism is a reduction gear set.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 It is a structural schematic diagram of a hidden slide plate and a double ring plate in the automatic knife retracting structure of a can opener in some embodiments of the utility model;

[0018] Figure 2 It is a structural schematic diagram of a hidden fixing seat in the automatic knife retracting structure of a can opener in some embodiments of the utility model;

[0019] Figure 3 yes Figure 2 A cross-sectional schematic diagram with a driving wheel;

[0020] Figure 4 yes Figure 1 Schematic diagram of the structure of the blocking member.

[0021] Reference numerals:

[0022] Fixed seat 100, cutting wheel 110, cutting knife 120, main shaft 130, retaining spring 131;

[0023] Idler gear 200, driving gear 210, driven gear 220;

[0024] Eccentric wheel 300, gear tooth segment 310;

[0025] Compression spring 400;

[0026] Blocking member 500, bending portion 510;

[0027] Driving wheel 600;

[0028] Slide plate 700 , double ring plate 710 . DETAILED DESCRIPTION

[0029] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0030] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a first or second description, it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] refer to Figures 1 to 4 The automatic knife retracting structure of a can opener according to an embodiment of the utility model is described.

[0034] like Figure 1and Figure 4 As shown, the automatic knife retracting structure of the can opener according to the embodiment of the utility model comprises: a fixed seat 100, on which a cutting wheel 110 and a cutting knife 120 are movably arranged; an idler wheel 200, which is rotatably arranged on the fixed seat 100; an eccentric wheel 300, which is rotatably arranged on the fixed seat 100, the eccentric wheel 300 is transmission-connected with the idler wheel 200, and the eccentric wheel 300 is transmission-connected with the cutting knife 120; a compression spring 400, which is arranged on the eccentric wheel 300, and is used to drive the eccentric wheel 300 to rotate in the opposite direction to increase the distance between the cutting wheel 110 and the cutting knife 120; a blocking member 500, which is arranged on the fixed seat 100, and is located on one side of the eccentric wheel 300, and is used to resist the compression spring 400.

[0035] like Figure 1 and Figure 2 As shown, an idler wheel 200 and an eccentric wheel 300 are arranged in the fixed seat 100, and the idler wheel 200 and the eccentric wheel 300 are both rotatably connected to the fixed seat 100. The cutting wheel 110 and the cutting knife 120 are arranged on the outside of the fixed seat 100, and the cutting wheel 110 and the cutting knife 120 are respectively rotatably connected to the fixed seat 100, and the cutting knife 120 can slide on the outside of the fixed seat 100, and a compression spring 400 is arranged at the clockwise downstream end of the gear tooth segment 310.

[0036] In the can opening cutting state, the idler wheel 200 rotates to drive the idler wheel 200 to drive the eccentric wheel 300 to rotate synchronously. The eccentric wheel 300 drives the compression spring 400 to counter the blocking member 500 under the drive of the idler wheel 200, and at the same time, the cutting knife 120 moves in the direction close to the cutting wheel 110. In the retracting state, the compression spring 400 on the eccentric wheel 300 releases the elastic force to make the eccentric wheel 300 rotate in the opposite direction. The eccentric wheel 300 meshes with the idler wheel 200 and drives the eccentric wheel 300 to reverse. The cutting knife 120 opens the gap with the cutting wheel 110 under the drive of the eccentric wheel 300, thereby completing the retracting action. Therefore, through the coordinated operation of the eccentric wheel 300, the idler wheel 200 and the compression spring 400, the cutting wheel 110 and the cutting knife 120 can complete the automatic retracting action, thereby reducing energy consumption, improving energy utilization efficiency, and extending the service life of the equipment.

[0037] In some specific embodiments of the present invention, the compression spring 400 extends along the tangent direction of the edge of the eccentric wheel 300 .

[0038] like Figure 1 and Figure 2As shown, the axial direction of the compression spring 400 is tangent to the edge of the eccentric wheel 300. In the advance state, the idler wheel 200 drives the eccentric wheel 300 to rotate clockwise, so that the compression spring 400 can directly press against the blocking member 500 along the rotation path of the outer edge of the eccentric wheel 300. In the retract state, the compression spring 400 releases the elastic force, the eccentric wheel 300 rotates counterclockwise, and drives the idler wheel 200 to rotate clockwise. The cutting knife 120 opens the gap between the cutting wheel 110 under the drive of the eccentric wheel 300, thereby completing the retract action. It should be noted that when the eccentric wheel 300 rotates counterclockwise to the specified position, it will stop automatically. Specifically, the position of the eccentric wheel 300 can be detected by a limit switch installed in the fixing seat 100, and a stop signal is triggered when the specified position is reached, so that the eccentric wheel 300 stops rotating, or a position sensor is used to monitor the rotation position of the eccentric wheel 300. When the preset position is reached, the sensor will send a signal to the control system to instruct the eccentric wheel 300 to stop rotating.

[0039] In some specific embodiments of the present invention, the blocking member 500 is provided with a bending portion 510, which is located on the side of the blocking member 500 close to the eccentric wheel 300. The blocking member 500 is bent toward the side close to the compression spring 400 through the bending portion 510, and the bending portion 510 is used to prevent the compression spring 400 and the blocking member 500 from slipping off. Figure 4 As shown, the blocking member 500 is provided with a bending portion 510, which is located on the side of the blocking member 500 close to the eccentric wheel 300. The blocking member 500 is bent toward the side close to the compression spring 400 through the bending portion 510, and the cross-sectional area of ​​the bending portion 510 gradually increases in the direction close to the eccentric wheel 300. By arranging the bending portion 510 on the blocking member 500, it is possible to prevent the compression spring 400 from slipping when the blocking member 500 is in contact with each other.

[0040] In some specific embodiments of the present invention, a driving wheel 600 is further included. The driving wheel 600 is rotatably disposed on the fixing seat 100 . The driving wheel 600 is transmission-connected to the cutting wheel 110 . The driving wheel 600 is used to drive the cutting wheel 110 to rotate.

[0041] like Figure 3 As shown, the eccentric wheel 300 is located at the lower side of the driving wheel 600. In the can opening and cutting state, the driving wheel 600 is driven, and the driving wheel 600 drives the cutting wheel 110 to rotate, and the idler wheel 200 drives the eccentric wheel 300 to drive the cutting knife 120 to approach the cutting wheel 110. Figure 1 As shown, in the retracted state, the compression spring 400 on the eccentric wheel 300 releases its elastic force, the eccentric wheel 300 reverses, and drives the idler wheel 200 to engage and rotate, and the cutting knife 120 moves to the left under the drive of the eccentric wheel 300 to open the gap with the cutting wheel 110, thereby completing the retracted action by mechanical transmission.

[0042] In some specific embodiments of the present invention, a slide plate 700 is further included, the slide plate 700 is slidably disposed on the fixed seat 100, the slide plate 700 is transmission-connected with the eccentric wheel 300, the cutting knife 120 is rotatably disposed on the slide plate 700, and the eccentric wheel 300 drives the cutting knife 120 away from and close to the cutting wheel 110 through the slide plate 700. Further, the eccentric wheel 300 and the slide plate 700 are connected through a double ring plate 710, and the double ring plate 710 converts the rotational motion of the eccentric wheel 300 into the linear motion of the slide plate 700.

[0043] like Figures 2 to 3 As shown, the double ring plate 710 has two through holes arranged in the up-down direction, and the eccentric wheel 300 is connected to the slide plate 700 through the double ring plate 710. Specifically, one end of the double ring plate 710 is sleeved on the slide plate 700, that is, one of the through holes of the double ring plate 710 is sleeved on the cylindrical protrusion corresponding to the slide plate 700, so that the double ring plate 710 can rotate relative to the slide plate 700, and the other end of the double ring plate 710 is sleeved on the eccentric wheel 300, that is, the other through hole of the double ring plate 710 is sleeved on the lower end of the eccentric wheel 300. The slide plate 700 can only move linearly in the left and right directions under the limit of the fixed seat 100. Therefore, the double ring plate 710 converts the rotation of the eccentric wheel 300 into the left and right movement of the slide plate 700, so that the cutting knife 120 can move linearly in the left and right directions to achieve approaching and moving away from the cutting wheel 110.

[0044] In some specific embodiments of the present invention, the cutting knife 120 is tilted on the slide 700, whereby the eccentric wheel 300, the double ring plate 710 and the slide 700 cooperate to drive the cutting knife 120 to approach and move away from the cutting wheel 110, and the tilted cutting wheel 110 can reduce the resistance during cutting, making it easier for the blade to penetrate the can cover, thereby reducing the risk of the can cover being stuck or stuck, avoiding jamming during the cutting process, and at the same time, can better guide the can cover, making it easier to be accurately cut during the cutting process, thereby improving the cutting efficiency.

[0045] In some specific embodiments of the present invention, a transmission mechanism is further included, wherein the transmission mechanism is transmission-connected to the electric motor, and the transmission mechanism is transmission-connected to the idler wheel 200 .

[0046] In some specific embodiments of the present invention, the transmission mechanism is a reduction gear set.

[0047] The application of the automatic knife retracting structure of the can opener is described in detail below through a specific embodiment.

[0048] The fixing seat 100 is provided with an electric motor and a transmission mechanism. Figure 3As shown, the output shaft of the electric motor is transmission-connected with the reduction gear set. In this specific embodiment, the pinion, the first-stage gear, the second-stage gear and the third-stage gear on the output shaft of the electric motor are meshed in sequence, and the third-stage gear is meshed with the driving wheel 600 sleeved on the main shaft 130. Thus, the electric motor finally drives the main shaft 130 to rotate, so as to drive the main shaft 130 to drive the cutting wheel 110 to rotate, thereby realizing a low-speed and high-torque rotation action that meets the cutting conditions of the can opener.

[0049] The main shaft 130 is inserted into the fixed seat 100 in the up-down direction, wherein the main shaft 130 is provided with a driving wheel 600 and a cutting wheel 110, the driving wheel 600 is located on the fixed seat 100, and the cutting wheel 110 is located outside the fixed seat 100, and the electric motor drives the driving wheel 600 to rotate through the transmission mechanism. The eccentric wheel 300 is sleeved on the main shaft 130, and the periphery of the eccentric wheel 300 has a gear segment 310, and a compression spring 400 is provided at the clockwise downstream end of the gear segment 310. The idler wheel 200 is rotatably arranged in the fixed seat 100, and the idler wheel 200 is transmission-connected with the driving wheel 600. The skateboard 700 is slidably arranged at the lower end of the fixed seat 100, and the skateboard 700 is transmission-connected to the eccentric wheel 300. A cutting knife 120 is slidably arranged on the skateboard 700, and the cutting wheel 110 is located on the outer side of the fixed seat 100. The cutting knife 120 and the cutting wheel 110 correspond to each other. When the eccentric wheel 300 rotates, the cutting knife 120 can be driven to approach and move away from the cutting wheel 110.

[0050] like Figure 3 As shown, a retaining spring 131 is provided on the main shaft 130, and the retaining spring 131 is located between the driving wheel 600 and the main shaft 130, and the retaining spring 131 is used to fix the position of the driving wheel 600 on the main shaft 130. In this specific embodiment, a limiting groove corresponding to the retaining spring 131 is provided on the main shaft 130, and the retaining spring 131 is embedded in the limiting groove, and its lower end abuts against the driving wheel 600, so as to fix the driving wheel 600 at a specific position on the main shaft 130, prevent the driving wheel 600 from deflecting or loosening during operation, and play a role of buffering and shock absorption, thereby reducing instability and loss caused by vibration.

[0051] It should be noted that the eccentric wheel 300 includes a driving gear 210 and a driven gear 220, and the driving gear 210 is coaxially arranged at the upper end of the driven gear 220. The eccentric wheel 300 is located at the lower side of the driving wheel 600, and the diameter of the driving wheel 600 is larger than the diameter of the eccentric wheel 300, and the diameter of the driving gear 210 is smaller than the diameter of the driven gear 220. The driving gear 210 is meshed with the driving wheel 600, and the driven gear 220 can be meshed with the gear segment 310 of the eccentric wheel 300. In the can opening and cutting state, the transmission mechanism drives the driving wheel 600 to rotate clockwise, the driving wheel 600 is meshed with the driving gear 210 and drives the driving gear 210 to rotate counterclockwise, and at the same time, the driven gear 220 is meshed with the gear segment 310 of the eccentric wheel 300. The driving gear 210 rotates synchronously to drive the eccentric wheel 300 to rotate clockwise. The eccentric wheel 300 drives the cutting knife 120 to approach the cutting wheel 110 under the drive of the idler wheel 200. When the eccentric wheel 300 rotates until the end of the gear segment 310 abuts against the driven gear 220, the driven gear 220 and the eccentric wheel 300 slip. At this time, the eccentric wheel 300 remains stationary under the abutment of the first elastic member and the fixing seat 100. The cutting knife 120 and the cutting wheel 110 form a stable rigid gap and are clamped on the edge of the can.

[0052] Furthermore, in the case of can cutting, the slippage of the idler wheel 200 will cause the transmission ratio between the idler wheel 200 and the eccentric wheel 300 to be higher than that of the cutting wheel 110, so that the slippage speed of the eccentric wheel 300 is higher than the rotation speed of the cutting wheel 110. In this specific embodiment, the idler wheel 200 runs at 48 rpm and the cutting wheel 110 runs at 17 rpm, so that the idler wheel 200 runs at a speed higher than that of the cutting wheel 110. Under such a speed difference, there is almost no chance that the idler wheel 200 drives the eccentric wheel 300 to slip to open the cutting gap, thereby ensuring that the cutting wheel 110 and the cutting blade 120 can maintain a rigid gap during cutting.

[0053] Therefore, the working principle of the can opener in this specific embodiment is as follows: the edge of the can is placed between the cutting wheel 110 and the cutting knife 120, the can opening function is started, the electric motor rotates forward, and after the first gear, the second gear and the third gear are decelerated and the torque is increased, the driving wheel 600 is driven to rotate clockwise, the driving wheel 600 drives the cutting wheel 110 to rotate through the main shaft 130, the driving wheel 600 is meshed with the driving gear 210 of the idler wheel 200, and the driving gear 210 and the driven gear 220 rotate synchronously, so that the eccentric wheel 300 and the driving wheel 600 rotate in the clockwise direction together, the eccentric wheel 300 drives the slide plate 700 to move backward through the double ring plate 710, so that the cutting knife 120 on the slide plate 700 approaches the cutting wheel 110 to the right until the cutting knife 120 and the cutting wheel 110 are clamped. The eccentric wheel 300 is tightly attached to the edge of the can. At this time, the compression spring 400 at the clockwise downstream end of the gear segment 310 on the eccentric wheel 300 abuts against the blocking member 500 on the fixed seat 100, and the automatic can opener enters the cutting state. In this state, the eccentric wheel 300 remains stationary. Since the operating speed of the idler wheel 200 is 48 rpm and the operating speed of the cutting wheel 110 is 17 rpm, the operating speed of the idler wheel 200 is much greater than the operating speed of the cutting wheel 110. The clockwise upstream end of the gear segment 310 slips with the driven gear 220, and a stable rigid gap is formed between the cutting knife 120 and the cutting wheel 110, so that the cutting knife 120 is clamped on the edge of the can to maintain a clamped state. At the same time, the cutting wheel 110 is driven to rotate by the main shaft 130, and the cutting wheel 110 and the cutting knife 120 cooperate with each other to complete the can cutting action. When the cutting is completed, the motor reverses, and the compression spring 400 releases its elastic force, pushing the eccentric wheel 300 to rotate counterclockwise, and the gear segment 310 on the eccentric wheel 300 meshes and rotates with the driven gear 220, and the driven gear 220 rotates synchronously with the driving gear 210 and drives the driving wheel 600 to reverse together, and the eccentric wheel 300 reverses and drives the slide plate 700 to move to the left through the double ring plate 710, so that the cutting knife 120 is away from the cutting wheel 110, and then the automatic can opener is removed from the edge of the can to complete the knife retracting action.

[0054] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. An automatic knife retraction structure for a can opener, characterized in that: include: A fixed seat (100), wherein a cutting wheel (110) and a cutting knife (120) are movably arranged on the fixed seat (100); An idler wheel (200), the idler wheel (200) being rotatably disposed on the fixing seat (100); an eccentric wheel (300), the eccentric wheel (300) being rotatably disposed on the fixed seat (100), the eccentric wheel (300) being transmission-connected to the idler wheel (200), and the eccentric wheel (300) being transmission-connected to the cutting knife (120); a compression spring (400), the compression spring (400) being arranged on the eccentric wheel (300), the compression spring (400) being used to drive the eccentric wheel (300) to rotate in the opposite direction, so as to increase the distance between the cutting wheel (110) and the cutting knife (120); A blocking member (500), the blocking member (500) being arranged on the fixing seat (100), the blocking member (500) being located on one side of the eccentric wheel (300), and the blocking member (500) being used to abut against the compression spring (400).

2. The automatic knife retraction structure of a can opener according to claim 1, characterized in that: The compression spring (400) extends along a tangent direction of the edge of the eccentric wheel (300).

3. The automatic knife retraction structure of a can opener according to claim 1, characterized in that: The blocking member (500) is provided with a bending portion (510), the bending portion (510) being located at one end of the blocking member (500) close to the eccentric wheel (300), the blocking member (500) being bent toward a side close to the compression spring (400) via the bending portion (510), the bending portion (510) being used to prevent the compression spring (400) and the blocking member (500) from slipping off.

4. The automatic knife retraction structure of a can opener according to claim 1, characterized in that: It also comprises a driving wheel (600), the driving wheel (600) being rotatably arranged on the fixing seat (100), the driving wheel (600) being transmission-connected to the cutting wheel (110), and the driving wheel (600) being used to drive the cutting wheel (110) to rotate.

5. The automatic knife retraction structure of a can opener according to claim 1, characterized in that: It also comprises a slide plate (700), the slide plate (700) being slidably disposed on the fixing seat (100), the slide plate (700) being transmission-connected to the eccentric wheel (300), the cutting knife (120) being rotatably disposed on the slide plate (700), and the eccentric wheel (300) driving the cutting knife (120) away from and close to the cutting wheel (110) via the slide plate (700).

6. The automatic knife retraction structure of a can opener according to claim 5, characterized in that: The eccentric wheel (300) and the slide plate (700) are transmission-connected via a double-ring plate (710), and the double-ring plate (710) converts the rotational motion of the eccentric wheel (300) into the linear motion of the slide plate (700).

7. The automatic knife retraction structure of a can opener according to claim 5, characterized in that: The cutting knife (120) is arranged obliquely on the slide plate (700).

8. The automatic knife retraction structure of a can opener according to claim 1, characterized in that: It also comprises a transmission mechanism, which is in transmission connection with the idler wheel (200).

9. The automatic knife retraction structure of a can opener according to claim 8, characterized in that: The transmission mechanism is a reduction gear set.

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