CN111734925B

CN111734925B - Embedded intelligent voice interaction module of refrigerator

Info

Publication number: CN111734925B
Application number: CN202010579062.8A
Authority: CN
Inventors: 刘伟; 田应福
Original assignee: Guangdong Taide Zhilian Technology Co Ltd
Current assignee: Guangdong Taide Zhilian Technology Co Ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-05-28
Anticipated expiration: 2040-06-23
Also published as: CN111734925A

Abstract

The invention discloses an embedded intelligent voice interaction module of a refrigerator, which comprises a shell, wherein a main PCB is arranged in the shell, a voice input module, a voice output module and a voice processing module are arranged on the main PCB, a flat-drawing device is arranged at the bottom of the shell and comprises a containing cavity arranged at the bottom of the outer side of the shell and a balance warped plate arranged in the containing cavity, the balance warped plate comprises a base and a top plate, the base is flush with the bottom surface of the shell, a drawing component is arranged between a bulge and the base, two ends of the base are provided with support frames, a support rod is arranged between the two support frames in a penetrating way, the lower end surface of the top plate is provided with a shaft sleeve, the shaft sleeve is arranged outside the support rod in a penetrating way, a fixed seat is arranged between the base and the top plate, the bottom end of the fixed seat is hinged with the outer end edge of, and the voice interaction module can not be deflected, so that the voice interaction module is prevented from being damaged in the pulling-out process.

Description

Embedded intelligent voice interaction module of refrigerator

Technical Field

The embodiment of the invention relates to the technical field of electronic devices, in particular to an embedded intelligent voice interaction module of a refrigerator.

Background

At present, for a refrigerator, in order to facilitate the use of a user, people improve a remote controller or add a voice control function on an air conditioner to enable the refrigerator to have a voice recognition function, and the air conditioner is controlled according to a signal sent by the voice remote controller or a voice signal sent by the user.

The existing voice interaction module circuit board needs to be inserted into a circuit main board. When installing, assemble in the workshop usually, operate by the machine, the degree of accuracy is higher, can make the vertical slot that inserts of voice interaction module circuit board, and when carrying out the pulling out of voice interaction module circuit board, usually when carrying out the maintenance, mostly adopt the manual work to pull out this moment, the degree of accuracy is lower, the direction of pulling out has very big relevance with the direction of application, and the direction of pulling out the orientation is not easily controlled, often lead to the skew phenomenon to appear when voice interaction module circuit board pulls out, make the voice interaction module impaired, can't use.

Disclosure of Invention

Therefore, the embodiment of the invention provides an embedded intelligent voice interaction module of a refrigerator, which aims to solve the problems that when the circuit board of the existing voice interaction module is pulled out, manual pulling is mostly adopted, the direction of the pulling force is not easy to control, and the voice interaction module is damaged and cannot be used due to the fact that the voice interaction module is deflected when the circuit board of the voice interaction module is pulled out.

In order to achieve the above object, the embodiment of the present invention discloses the following technical solutions:

an embedded intelligent voice interaction module of a refrigerator comprises a shell, wherein a main PCB is installed in the shell, a voice input module, a voice output module and a voice processing module are arranged on the main PCB, a flat-pulling device is arranged at the bottom of the shell and comprises an accommodating cavity arranged at the bottom of the outer side of the shell and a balance warping plate arranged in the accommodating cavity, and a bulge corresponding to a gap at the inner side of the balance warping plate is arranged on the inner wall of the accommodating cavity;

the balanced wane includes base and roof, the base with the bottom surface of shell flushes, protruding with be provided with the pull subassembly between the base, the both ends of base are provided with the support frame, two the support frame between wear to be equipped with the bracing piece, the lower terminal surface of roof is provided with the axle sleeve, the axle sleeve is worn to establish the bracing piece is outside, the axle sleeve with no fixed connection relation between the bracing piece, the outer end of base with be connected with the fixing base between the outer end of roof, the bottom of fixing base with the outer end edge of base is articulated.

Furthermore, the drawing component comprises a drawing rod arranged on the inner side surface of the base and a drawing hole cavity arranged on the inner wall of the accommodating cavity, the drawing rod corresponds to the drawing hole cavity, an anti-falling block is arranged at the front end of the drawing rod, and an anti-falling cavity used for accommodating the anti-falling block is arranged at the front end of the drawing hole cavity.

Further, the fixing base rotates to a vertical state, and when the balance wane contacts with the protrusion, the fixing base seals the outer side face of the accommodating cavity, and the base seals the bottom face of the accommodating cavity, so that the outer surface of the shell is smooth.

Further, be provided with the sucking disc on the fixing base when the fixing base rotates to the horizontality, sucking disc and mainboard actuation, so that the rigidity of balanced wane.

Further, the fixing base includes interior plate and outer panel, the bottom of interior plate with the base is articulated, the top of interior plate with the top of outer panel is articulated, the sucking disc sets up the inner face of outer panel, the inner face of outer panel is provided with and is used for holding the holding tank of sucking disc, the outside of interior plate sets up with receiving the groove, a part of sucking disc extends to in the receiving groove.

Further, when the inner side plate and the outer side plate are both in a horizontal state, the suction cup is located on the same horizontal plane with the bottom surface of the shell.

Furthermore, the upper end surface of the top plate is provided with a tilting groove, and when the inner end of the top plate is in contact with the base and the top plate is in contact with the protrusion, the tilting groove is embedded with the lower corner of the protrusion.

Furthermore, the shell is provided with a buckle assembly for fixing the shape of the fixing seat when the fixing seat is in a vertical state, so that the outer surface of the shell is smooth.

Further, the buckle assembly comprises a buckle sliding groove arranged on the outer wall of the shell, the buckle sliding groove is vertically arranged above the accommodating cavity, a clamping and stopping sliding block is arranged in the buckle sliding groove in a vertical sliding mode, a clamping and stopping groove is formed in the upper portion of the outer side plate and is in butt joint with the buckle sliding groove, and when the clamping and stopping sliding block slides to the lowest end of the buckle sliding groove, the lower end of the clamping and stopping sliding block is inserted into the clamping and stopping groove.

Further, the bottom of buckle spout is provided with stirs the draw-in groove, be provided with the reed on stirring the both sides inner wall of draw-in groove, the middle part of reed to the center department of draw-in groove is protruding, the inner face that stops the slider is provided with the driving lever, the diameter of driving lever is greater than two the interval of reed mid point when the driving lever is located stir the lower part of draw-in groove, stop the slider and be located the lower extreme of buckle spout, and work as the driving lever is located stir the upper portion of draw-in groove, stop the slider and be located the top of buckle spout, this moment stop the slider with stop the groove contactless.

The embodiment of the invention has the following advantages:

the voice interaction module is pulled out through the balance seesaw, the driving force direction in the tilting process is fixed by utilizing the lever principle, the balance seesaw is arranged on the left side and the right side of the shell, namely, the left side and the right side of the shell are subjected to the tilting force when the shell is tilted through the balance seesaw, and only the upward lifting force is left after the balance of the balance seesaw and the balance seesaw, so that the shell only vertically moves upwards and cannot deflect, and the defect that the voice interaction module is easy to deflect when the voice interaction module is pulled out in the prior art and the voice interaction module is damaged is overcome.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

FIG. 1 is a schematic view of the overall structure of an embodiment of the present invention;

FIG. 2 is a schematic diagram of the internal structure of the housing according to the embodiment of the present invention;

fig. 3 is a schematic structural diagram of a balanced rocker according to an embodiment of the present invention;

fig. 4 is a schematic structural view of the balance rocker in the embodiment of the present invention when the balance rocker is pulled out;

fig. 5 is a schematic structural view of a balanced rocker according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a fixing base according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a snap assembly according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a card slot for dialing in the embodiment of the present invention.

In the figure:

1. a housing; 2. a flat-drawing device; 3. balancing a rocker; 4. a pull assembly; 5. a fixed seat; 6. a suction cup; 7. a buckle assembly;

101. a main PCB board; 102. a voice input module; 103. a voice output module; 104. a voice processing module;

201. an accommodating chamber; 202. a protrusion;

301. a base; 302. a top plate; 303. a support frame; 304. a support bar; 305. a shaft sleeve; 306. tilting the groove;

401. a pull rod; 402. drawing the hole cavity; 403. an anti-drop block; 404. an anti-drop cavity;

501. an inner side plate; 502. an outer panel; 503. a receiving groove; 504. accommodating grooves;

701. a buckle chute; 702. clamping a sliding block; 703. a locking groove; 704. shifting the clamping groove; 705. a reed; 706. a deflector rod.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 8, the invention discloses an embedded intelligent voice interaction module for a refrigerator, which comprises a housing 1, wherein a main PCB 101 is installed in the housing 1, a voice input module 102, a voice output module 103 and a voice processing module 104 are arranged on the main PCB 101, the voice input module 102 is used for receiving voice instruction information sent by a user and transmitting the voice instruction information to the voice processing module 104, the voice input module 102 is connected with a microphone 103, and the voice input module 102 can accurately receive the voice instruction information sent by the user within a certain distance range (such as 3 meters). The voice processing module 104 is configured to convert the voice instruction information received by the voice input module 102 into a control instruction that can be recognized by the air conditioner main control circuit part, convert the converted control instruction into a voice signal, feed the voice signal back to the user for confirmation, and output the converted control instruction in the form of a control code according to the voice instruction information confirmed by the user.

The voice processing module 104 finds the keyword matched with the received voice instruction information from the voice information database by matching the received voice instruction information with the voice instruction information stored in the voice information database, converts the keyword, and feeds the converted keyword back to the user for confirmation. The voice processing module 104 comprises an audio processing chip and a microcontroller chip, the audio processing chip is integrated with an A/D conversion circuit and a D/A conversion circuit, the audio processing chip firstly samples keywords matched with the voice instruction information according to a set sampling frequency, then the A/D conversion circuit converts the sampled voice instruction information keywords into digital control signals capable of being recognized by the air conditioner main control circuit, the audio processing chip converts the converted digital control signals into voice signals through the D/A conversion circuit according to control signals output by the microcontroller, and the voice signals are fed back to a user through the voice output module 103 to confirm the voice instruction information; the microcontroller chip converts the digital control signal converted by the audio processing chip into a binary control code according to the voice instruction information confirmed by the user and outputs the binary control code to the air conditioner main control circuit part, and the main control circuit controls the air conditioner to execute corresponding operation according to the binary control code.

If the information fed back to the user through keyword conversion is the same as the voice instruction information input by the user, the voice processing module 104 converts the digital signal after keyword conversion into a form of binary control code according to the voice instruction information confirmed by the user and outputs the binary control code to the air conditioner main control circuit part; if the information fed back to the user through keyword conversion is different from the voice instruction information input by the user, the user is required to re-input the voice instruction information. Specifically, for example, the voice instruction information sent by the user is "too hot", the voice processing module 104 matches the received voice instruction information with the voice instruction information stored in the voice information database to obtain keywords "cooling", "refrigerating", and the like matching with "too hot", the voice processing module 104 selects "refrigerating" in the database to perform signal conversion, converts "refrigerating" into a digital control signal through a/D, converts the converted digital control signal into a voice signal "refrigerating" through D/a according to a control instruction output by the microcontroller, and feeds the voice signal "refrigerating" back to the user for confirmation through the voice output module 103; after the user hears the refrigeration feedback information, the feedback information is confirmed, a binary control code is obtained according to the instruction information confirmed by the user and the refrigeration converted digital signal and is output to the main control circuit part, and the main control circuit part controls the corresponding action of the air conditioner according to the binary control code.

The voice output module 103 is used for feeding back the converted voice signal to the user for confirmation, and the voice output module 103 is connected with the loudspeaker 102.

Through the arrangement, the voice interaction function of the refrigerator is realized.

As shown in figure 1 of the drawings, in which, fig. 3 and 4 show, the bottom of shell 1 is provided with flat-pull device 2, flat-pull device 2 is including setting up the chamber 201 that holds in the bottom of shell 1 outside and setting up the balanced wane 3 in holding chamber 201, it is provided with the protruding 202 corresponding with the inboard vacancy of balanced wane 3 on the inner wall of chamber 201 to hold, balanced wane 3 includes base 301 and roof 302, base 301 flushes with the bottom surface of shell 1, be provided with pull subassembly 4 between protruding 202 and the base 301, the both ends of base 301 are provided with support frame 303, wear to be equipped with bracing piece 304 between two support frames 303, the lower terminal surface of roof 302 is provided with axle sleeve 305, axle sleeve 305 wears to establish outside bracing piece 304, there is not fixed connection relation between axle sleeve 305 and the bracing piece 304, be connected with fixing base 5 between the outer end of base 301 and the outer end of roof 302, the bottom of fixing base 5 is articulated with the.

When carrying out pulling out of voice interaction module, making voice interaction module and mainboard break away from, will balance wane 3 and take out in holding chamber 201 through pull subassembly 4, then make the inboard downward sloping of roof 302, until with the contact of base 301, then inwards promote balanced wane 3, make roof 302 and protruding 202 contact, then pull the outside of roof 302 downwards, utilize lever principle to lift up shell 1, make voice interaction module and mainboard break away from. Because the left and right sides of shell 1 all is provided with and holds chamber 201, also be through balanced wane 3 perk shell 1 time, the left and right sides of shell 1 all receives the power of perk, and the two is balanced the back, only remains the power of upwards lifting to make the vertical rebound of shell 1, and can not incline, incline easily when having avoided among the prior art voice interaction module to extract, lead to the impaired drawback of voice interaction module.

As shown in fig. 1, 4 and 6, in the present embodiment, the drawing assembly 4 includes a drawing rod 401 disposed on the inner side surface of the base 301 and a drawing bore 402 disposed on the inner wall of the accommodating cavity 201, the drawing rod 401 corresponds to the drawing bore 402, the front end of the drawing rod 401 is provided with an anti-falling block 403, and the front end of the drawing bore 402 is provided with an anti-falling cavity 404 for accommodating the anti-falling block 403.

Meanwhile, as shown in fig. 1 and 7, when the fixing base 5 rotates to a vertical state and the balance rocker 3 contacts with the protrusion 202, the fixing base 5 seals the outer side surface of the accommodating cavity 201, and the base 301 seals the bottom surface of the accommodating cavity 201, so that the outer surface of the housing 1 is smooth.

Further, as shown in fig. 6, in order to fix the balance rocker 3 during tilting the housing 1, the fixing base 5 is provided with a suction cup 6, and when the fixing base 5 rotates to a horizontal state, the suction cup 6 is attracted to the main board, so as to fix the position of the balance rocker 3.

Further, as shown in fig. 6, in order to keep the outer surface of the housing 1 smooth when the fixing base 5 is vertical, the fixing base 5 includes an inner side plate 501 and an outer side plate 502, the bottom of the inner side plate 501 is hinged with the base 301, the top of the inner side plate 501 is hinged with the top of the outer side plate 502, the suction cup 6 is disposed on the inner face of the outer side plate 502, the inner surface of the outer plate 502 is provided with a receiving groove 504 for receiving the suction cup, the outer surface of the inner plate 501 is provided with a receiving groove 503, a part of the suction cup 6 extends into the receiving groove 503, thus, when the fixed seat 5 is vertical (when the inner side plate 501 and the outer side plate 502 are combined together), the suction cup 6 is positioned inside the fixed seat 5, the outer surface of the fixing seat 5 is always smooth, and when the inner side plate 501 and the outer side plate 502 are both in a horizontal state (at this time, the inner side plate 501 and the outer side plate 502 are unfolded to 180 degrees), the suction cup 6 and the bottom surface of the housing 1 are in the same horizontal plane.

In order to avoid that the friction between the top plate 302 and the protrusion 202 is too small and the tilting effect is not good when the housing 1 is tilted by the balance tilting plate 3, as shown in fig. 3, the upper end surface of the top plate 302 is provided with a tilting groove 306, and when the inner end of the top plate 302 contacts the base 301 and the top plate 302 contacts the protrusion 202, the tilting groove 306 is embedded with the lower corner of the protrusion 202, so as to enhance the friction between the top plate 302 and the protrusion 202.

Further, as shown in fig. 1, 7 and 8, in order to keep the balance rocker 3 in a vertical state all the time when it is not needed, so as to make the outer surface of the housing 1 smooth, the buckle assembly 7 includes a buckle sliding slot 701 disposed on the outer wall of the housing 1, the buckle sliding slot 701 is vertically disposed above the accommodating cavity 201, a stop slider 702 is disposed in the buckle sliding slot 701 in a vertical sliding manner, a stop groove 703 is disposed on the upper portion of the outer surface of the outer side plate 502, the stop groove 703 is in butt joint with the buckle sliding slot 701, when the stop slider 702 slides to the lowest end of the buckle sliding slot 701, the lower end of the stop slider 702 is inserted into the stop groove 703, a toggle clamping slot 704 is disposed at the bottom of the buckle sliding slot 701, reeds 705 are disposed on the inner walls on both sides of the toggle clamping slot 704, the middle portions of the reeds 705 protrude toward the center of the clamping slot 704, a deflector rod 706 is disposed, when the shift lever 706 is located at the lower portion of the shift slot 704, the stop slider 702 is located at the lowest end of the latch sliding slot 701, and when the shift lever 706 is located at the upper portion of the shift slot 701, the stop slider 702 is located at the highest end of the latch sliding slot 701, and at this time, the stop slider 702 is not in contact with the stop slot 703.

In snap assembly 7, the diameter of toggle 706 is greater than the separation of the midpoints of two leaves 704, toggle 706 is located within toggle slot 704, either at the upper end or the lower end, when the shift lever 706 is located at the upper end of the shift slot 704, the stop slider 702 is located at the upper end of the buckle sliding slot 701, at this time, the stop slider 702 is not in contact with the stop slot 703, the fixing base 5 can rotate to the horizontal state, so as to complete the tilting operation of the shell 1, when the tilting of the shell 1 is completed, the fixed seat 5 is rotated to a vertical state, then the locking slide block 702 is pushed to move upwards to the state that the shift lever 706 passes through the gaps of the two reeds 705, the shift lever 706 is pushed by the two reeds 705 to move to the lower end of the shift clamping groove 704, the stop slider 702 is located at the lower end of the buckle sliding groove 701, the lower end of the stop slider 702 is inserted into the stop groove 703 at the moment, and the fixing seat 5 is locked in the state, so that the outer surface of the shell 1 is smooth.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. An embedded intelligent voice interaction module of a refrigerator comprises a shell (1), wherein a main PCB (101) is installed in the shell (1), and a voice input module (102), a voice output module (103) and a voice processing module (104) are arranged on the main PCB (101), and is characterized in that a flat-pull device (2) is arranged at the bottom of the shell (1), the flat-pull device (2) comprises a containing cavity (201) arranged at the bottom of the outer side of the shell (1) and a balance warping plate (3) arranged in the containing cavity (201), and a bulge (202) corresponding to the vacancy at the inner side of the balance warping plate (3) is arranged on the inner wall of the containing cavity (201);

the balance rocker (3) comprises a base (301) and a top plate (302), the base (301) is flush with the bottom surface of the shell (1), a drawing component (4) is arranged on the inner wall of the accommodating cavity (201), the output end of the drawing component (4) is connected with the base (301), two ends of the base (301) are provided with supporting frames (303), a supporting rod (304) is arranged between the two supporting frames (303) in a penetrating way, the lower end surface of the top plate (302) is provided with a shaft sleeve (305), the shaft sleeve (305) is arranged outside the supporting rod (304) in a penetrating way, the shaft sleeve (305) is not fixedly connected with the support rod (304), a fixed seat (5) is connected between the outer end of the base (301) and the outer end of the top plate (302), the bottom end of the fixed seat (5) is hinged with the outer end edge of the base (301).

2. The refrigerator embedded intelligent voice interaction module according to claim 1, wherein the drawing component (4) comprises a drawing rod (401) disposed on the inner side surface of the base (301) and a drawing hole cavity (402) disposed on the inner wall of the accommodating cavity (201), the drawing rod (401) corresponds to the drawing hole cavity (402), an anti-disengagement block (403) is disposed at the front end of the drawing rod (401), and an anti-disengagement cavity (404) for accommodating the anti-disengagement block (403) is disposed at the front end of the drawing hole cavity (402).

3. The embedded intelligent voice interaction module of a refrigerator according to claim 1, wherein when the fixing seat (5) rotates to a vertical state and the balance rocker (3) contacts with the protrusion (202), the fixing seat (5) seals the outer side surface of the accommodating cavity (201), and the base (301) seals the bottom surface of the accommodating cavity (201) to smooth the outer surface of the housing (1).

4. The embedded intelligent voice interaction module of refrigerator according to claim 1, wherein the fixing base (5) is provided with a suction cup (6), and when the fixing base (5) rotates to a horizontal state, the suction cup (6) is sucked with the main board, so that the balance rocker (3) is fixed in position.

5. The refrigerator embedded intelligent voice interaction module as claimed in claim 4, wherein the fixing base (5) comprises an inner side plate (501) and an outer side plate (502), the bottom of the inner side plate (501) is hinged with the base (301), the top of the inner side plate (501) is hinged with the top of the outer side plate (502), the suction cup (6) is arranged on the inner surface of the outer side plate (502), the inner surface of the outer side plate (502) is provided with a receiving groove (504) for receiving the suction cup, the outer surface of the inner side plate (501) is provided with a receiving groove (503), and a part of the suction cup (6) extends into the receiving groove (503).

6. The embedded intelligent voice interaction module of the refrigerator as claimed in claim 5, wherein the suction cup (6) is located at the same level with the bottom surface of the outer case (1) when the inner side plate (501) and the outer side plate (502) are both horizontal.

7. The embedded intelligent voice interaction module of refrigerator as claimed in claim 5, wherein the top surface of the top plate (302) is provided with a tilted groove (306), and when the inner end of the top plate (302) contacts with the base (301) and the top plate (302) contacts with the protrusion (202), the tilted groove (306) is embedded with the lower corner of the protrusion (202).

8. The embedded intelligent voice interaction module of the refrigerator as claimed in claim 7, wherein the housing (1) is provided with a snap assembly (7) for fixing the shape of the fixing seat (5) when the fixing seat is in the vertical state, so as to smooth the outer surface of the housing (1).

9. The embedded intelligent voice interaction module of the refrigerator according to claim 8, wherein the buckle assembly (7) comprises a buckle sliding groove (701) disposed on an outer wall of the housing (1), the buckle sliding groove (701) is vertically disposed above the accommodating cavity (201), a stop slider (702) is disposed in the buckle sliding groove (701) in a vertical sliding manner, a stop groove (703) is disposed on an upper portion of an outer surface of the outer side plate (502), the stop groove (703) is abutted to the buckle sliding groove (701), and when the stop slider (702) slides to a lowest end of the buckle sliding groove (701), a lower end of the stop slider (702) is inserted into the stop groove (703).

10. The embedded intelligent voice interaction module of a refrigerator of claim 9, the bottom of the buckle sliding groove (701) is provided with a toggle clamping groove (704), the inner walls of two sides of the toggle clamping groove (704) are provided with reeds (705), the middle part of the reed (705) protrudes to the center of the poking clamping groove (704), the inner surface of the clamping sliding block (702) is provided with a deflector rod (706), the diameter of the deflector rod (706) is larger than the distance between the middle points of the two reeds (705), when the shifting rod (706) is positioned at the lower part of the shifting clamping groove (704), the clamping and stopping sliding block (702) is positioned at the lowest end of the clamping and buckling sliding groove (701), and when the toggle lever (706) is positioned at the upper portion of the toggle card slot (704), the clamping sliding block (702) is positioned at the uppermost end of the clamping sliding groove (701), and at the moment, the clamping sliding block (702) is not in contact with the clamping groove (703).