Electric knife

Abstract

The utility model discloses an electric knife which comprises a knife shell, a microswitch and a starting button and is characterized in that the starting button is provided with an inwards-concave installation groove, the pressing contact end of the microswitch is arranged in the inwards-concave installation groove, the bottom of the inwards-concave installation groove is provided with a pressing part for pressing the pressing contact of the microswitch downwards, and the starting button moves front and back relative to the knife shell. The first limiting mechanism is used for limiting the front-back movement displacement of the starting button, the second limiting mechanism is used for limiting the pressing of the starting button towards the direction of the pressing contact, and when the starting button is located at the front side position / the rear side position, the second limiting mechanism limits the starting button and cannot press the starting button towards the direction of the pressing contact; the pressing part is separated from the pressing contact of the microswitch, when the starting button is located at the rear side position / the front side position, the second limiting mechanism has no limiting effect on the starting button, and when the starting button is pressed, the pressing part acts on the pressing contact of the microswitch. According to the utility model, the microswitch can be pressed only after the start button is shifted, the operation is convenient, and the safety coefficient is high.

Description

Technical Field

[0001] The utility model belongs to the field of knives, and in particular relates to an electric knife. Background Art

[0002] Electric knives generally include a knife housing, a start button, a micro switch, a motor, a transmission mechanism and a blade. The start button is embedded in the knife housing, the micro switch, the motor and the transmission mechanism are installed inside the knife housing, and the blade is installed at the front end of the knife housing. When starting, the action spring of the micro switch is contacted when the start button is pressed, thereby triggering the micro switch. The micro switch triggers the motor in the knife housing to run, and the motor drives the blade through the transmission mechanism to achieve electric cutting. In order to prevent the start button from being operated accidentally, it is usually necessary to lock it. Figure 1 The diagram shows a structure of an electric knife start button on the market, in which a locking pin 7 is added to the electric knife start button. When the locking pin 7 is in the locked position, the limit groove on the knife housing limits the locking pin 7 and the start button 3 cannot be pressed downward. The locking pin 7 is in the unlocked state, and the start button 3 can be pressed down to trigger the micro switch. This structure requires manual pushing of the locking pin 7 for unlocking or unlocking operations. The disadvantage is that it cannot automatically bounce back to the locked state after being released when not in use, and the safety factor is low. Figure 2 It is another electric knife start button structure, which adopts a safety trigger 8 structure. After pushing the safety trigger 8 to drive the locking pin 7 to move, press the start button 3 downward to start. After letting go, the safety trigger 8 will drive the locking pin 7 to rebound to the locked state. It is safe to use, but this structure requires the friction force of the finger to push the safety trigger, which is difficult to operate and has a poor user experience. Utility Model Content

[0003] The utility model aims to overcome the problems of inconvenient operation of the start button of the electric knife and low safety factor in the prior art, and to provide an electric knife with convenient operation and high safety factor.

[0004] In order to achieve the above purpose, the technical solution adopted in this application is:

[0005] An electric knife comprises a knife housing, a micro switch and a start button, wherein the start button has a concave mounting groove, a pressing contact end of the micro switch is placed in the concave mounting groove, a pressing component for pressing the pressing contact of the micro switch is provided at the bottom of the concave mounting groove, the start button moves forward and backward relative to the knife housing, and has a first limiting mechanism for limiting the forward and backward movement displacement of the start button and a second limiting mechanism for limiting the pressing of the start button in the direction of the pressing contact, when the start button is in the front side position / rear side position, the second limiting mechanism limits the start button so that it cannot be pressed in the direction of the pressing contact, the pressing component is separated from the pressing contact of the micro switch, when the start button is in the rear side position / front side position, the second limiting mechanism has no limiting effect on the start button, and when the start button is pressed, the pressing component acts on the pressing contact of the micro switch.

[0006] More preferably, the first limiting mechanism is columnar, a limiting hole is provided at the front end of the start button, and the first limiting mechanism is placed in the limiting hole.

[0007] More preferably, a torsion spring installation column is provided in the knife housing, and the torsion spring on the torsion spring installation column acts on the start button to reset the start button.

[0008] More preferably, the torsion spring mounting column serves as a second limiting mechanism, and a limiting baffle corresponding to the torsion spring mounting column is provided on the start button.

[0009] More preferably, the second limiting mechanism is a limiting protrusion provided at the bottom of the start button, and the limiting protrusion is limited by the micro switch.

[0010] More preferably, a finger limiting plate for limiting the position of the operating finger is provided at the end of the start button.

[0011] Preferably, the outer surface of the start button is provided with anti-slip grooves.

[0012] The beneficial effects of the utility model are: the start button is pulled back and then pressed downward, and it returns to its original position automatically after letting go, and the start button cannot be pressed without pulling back, or the start button is set in reverse, pushed forward and then pressed downward, and it returns to its original position automatically after letting go, and the start button cannot be pressed without pushing forward. The start button is easy to operate and has a high safety factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0014] Figure 1 This is a schematic diagram of the structure of the first electric knife start button in the prior art.

[0015] Figure 2 This is a schematic diagram of the structure of the second electric knife start button in the prior art.

[0016] Figure 3 It is a schematic diagram of the structure of the electric knife of the utility model.

[0017] Figure 4 It is a schematic diagram of the structure of the electric knife part.

[0018] Figure 5 This is a schematic diagram of the start button in the limit position state.

[0019] Figure 6 yes Figure 5 A partial enlarged view of point A in the middle.

[0020] Figure 7 This is a schematic diagram of the start button in the non-limited state.

[0021] Figure 8 yes Figure 7 A partial enlarged view of point B in the middle.

[0022] Fig. 9 This is a schematic diagram of the start button and micro switch.

[0023] Fig.10 yes Fig. 9 Middle CC section.

[0024] Fig.11 It is a stereoscopic diagram of the start button and micro switch.

[0025] In the figure: 1 knife housing, 2 micro switch, 21 pressing contact, 22 wiring pin, 3 start button, 31 concave mounting groove, 32 pressing component, 33 limiting hole, 34 limiting protrusion, 35 limiting baffle, 36 finger limiting plate, 37 anti-slip pattern, 4 first limiting mechanism, 5 torsion spring mounting column, 6 torsion spring. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] The utility model discloses an electric knife, comprising a knife housing 1, a micro switch 2 and a start button 3, wherein the start button 3 has a concave mounting groove 31, the end of the pressing contact 21 of the micro switch 2 is placed in the concave mounting groove 31, and a pressing component 32 for pressing the pressing contact 21 of the micro switch 2 is provided at the bottom of the concave mounting groove 31. The start button 3 moves forward and backward relative to the knife housing 1, and has a first limiting mechanism 4 for limiting the forward and backward movement displacement of the start button 3 and a second limiting mechanism for limiting the pressing of the start button 3 in the direction of the pressing contact 21. When the start button 3 is in the front side position / rear side position, the second limiting mechanism limits the start button 3 so that it cannot be pressed in the direction of the pressing contact 21, and the pressing component 32 is separated from the pressing contact 21 of the micro switch 2. When the start button 3 is in the rear side position / front side position, the second limiting mechanism has no limiting effect on the start button 3, and when the start button 3 is pressed, the pressing component 32 acts on the pressing contact 21 of the micro switch 2.

[0029] In this embodiment, the utility model is described by taking the structure that when the start button 3 is in the front side position, the second limit mechanism limits the start button 3 and prevents it from being pressed down, and when the start button 3 is in the rear side position, the start button 3 can be pressed so that the pressing component 32 acts on the pressing contact 21 of the micro switch 2. When the start button 3 is in the rear side position, the second limit mechanism limits the start button 3 and prevents it from being pressed down, and when the start button 3 is in the front side position, the start button 3 can be pressed so that the pressing component 32 acts on the pressing contact 21 of the micro switch 2, which can be achieved by slightly adjusting the above structure.

[0030] In this embodiment, the first limiting mechanism 4 is columnar, and a limiting hole 33 is provided at the front end of the start button 3, and the first limiting mechanism 4 is placed in the limiting hole 33. Figure 5 and Figure 6 When the start button 3 is in the initial position (front side position), there is a gap between the limit hole 33 and the first limit mechanism 4 at the front side. When the start button 3 moves to the rear side position, there is a gap between the limit hole 33 and the first limit mechanism 4 at the rear side. Figure 7 and Figure 8 .

[0031] See also Figure 4 A torsion spring mounting column 5 is provided in the knife housing 1, and a torsion spring 6 on the torsion spring mounting column 5 acts on the start button 3 to reset the start button 3. In this embodiment, when the start button 3 moves to the rear side position, after the start button 3 is released, the start button 3 moves to the front side position, that is, the initial position under the action of the torsion spring 6.

[0032] The second limiting mechanism for limiting the pressing of the start button 3 toward the pressing contact 21 can have a variety of designs. In this embodiment, the torsion spring mounting column 5 can be used as the second limiting mechanism, and a limiting baffle 35 corresponding to the torsion spring mounting column 5 is provided on the start button 3. In the initial position, the limiting baffle 35 of the start button 3 is in contact with the torsion spring mounting column 5, and the start button 3 cannot be pressed toward the micro switch 2. After the start button 3 moves backward, the limiting baffle 35 avoids the torsion spring mounting column 5. At this time, the start button 3 can be pressed toward the micro switch 2, and the pressing component 32 on the start button 3 acts on the pressing contact 21 of the micro switch 2. The second limiting mechanism can also be a limiting protrusion 34 provided at the bottom of the start button 3, and the limiting protrusion 34 is limited by the micro switch 2, see Fig.10 In the initial position, the limit protrusion 34 of the start button 3 is opposite to the micro switch 2, and the start button 3 cannot be pressed toward the micro switch 2 to touch the pressing contact 21. After the start button 3 moves backward, the limit protrusion avoids the micro switch 2. At this time, the start button 3 can be pressed toward the micro switch 2, and the pressing component 32 on the start button 3 acts on the pressing contact 21 of the micro switch 2.

[0033] In this embodiment, a finger limit plate 36 for limiting the position of the operating finger is provided at the end of the start button 3, and an anti-slip pattern 37 is provided on the outer surface of the start button 3. This structure makes it easier to operate the start button 3.

[0034] See also Fig.11 The micro switch 2 includes a pressing contact 21 and a wiring pin 22. By pressing its contact multiple times, the switch will repeatedly switch between on and off. The wiring pin 22 is connected by an electric wire and connected to the power supply circuit of the motor and the power supply. The pressing part is aligned with the pressing contact 21 of the micro switch 2. The user presses the start button 3, and the pressing part inside the start button 3 is forced to press the pressing contact 21 of the micro switch 2. The pressing is repeated to control the on or off of the power supply circuit, thereby controlling the start or shut down of the motor. The utility model limits the position state of the pressing contact 21 of the micro switch 2 that the start button 3 can act on. The limitation is achieved by shifting the start button 3 back and forth, which is simpler to operate, has a low possibility of misoperation, and is safer to use the electric knife.

[0035] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Electric knife, including knife housing, micro switch and start button, Features: The start button has a concave mounting groove, and the pressing contact end of the micro switch is placed in the concave mounting groove. A pressing component for pressing the pressing contact of the micro switch is provided at the bottom of the concave mounting groove. The start button moves forward and backward relative to the knife housing, and has a first limiting mechanism for limiting the forward and backward movement of the start button and a second limiting mechanism for limiting the pressing of the start button in the direction of the pressing contact. When the start button is in the front side position / rear side position, the second limiting mechanism limits the start button so that it cannot be pressed in the direction of the pressing contact, and the pressing component is separated from the pressing contact of the micro switch. When the start button is in the rear side position / front side position, the second limiting mechanism has no limiting effect on the start button, and when the start button is pressed, the pressing component acts on the pressing contact of the micro switch.

2. The electric knife according to claim 1, Features: The first limiting mechanism is columnar, a limiting hole is provided at the front end of the start button, and the first limiting mechanism is placed in the limiting hole.

3. The electric knife according to claim 1, Features: A torsion spring installation column is arranged in the knife housing, and the torsion spring on the torsion spring installation column acts on the start button to reset the start button.

4. The electric knife according to claim 3, Features: The torsion spring installation column serves as a second limiting mechanism, and a limiting baffle corresponding to the torsion spring installation column is provided on the start button.

5. The electric knife according to claim 1 or 4, Features: The second limiting mechanism is a limiting protrusion arranged at the bottom of the start button, and the limiting protrusion is limited by the micro switch.

6. The electric knife according to claim 1, Features: A finger limiting plate for limiting the position of the operating finger is provided at the end of the start button.

7. The electric knife according to claim 1, Features: The outer surface of the start button is provided with anti-slip patterns.

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