Dual-purpose cup with double covers

Abstract

The utility model belongs to the technical field of water cups, and particularly relates to a double-cover dual-purpose cup, which comprises a cup body and a cup cover, the cup cover comprises a cup cover body, an inner turning cover, an outer turning cover, a convection piece and a suction nozzle, a first side edge of the cup cover body is rotatably connected with the inner turning cover and the outer turning cover, and a second side edge of the cup cover body is buckled with or separated from the inner turning cover and the outer turning cover. A first water outlet and a second water outlet are formed in the cup cover body, when the inner turning cover is buckled on the cup cover body, the convection hole corresponds to the first water outlet in position and is communicated with the first water outlet, and the sucking channel corresponds to the second water outlet in position and is communicated with the second water outlet. The water dispenser has the advantages that a user can drink water through the first water outlet or the suction nozzle according to needs; when the outer flip cover and the inner flip cover are both buckled, the cover opening button is pressed for the first time, and after the second clamping hook is separated from the second clamping ring, the third clamping hook is buckled with the second clamping ring, so that the outer flip cover is in a semi-open state, steam is exhausted in the semi-open state, and hot steam is prevented from scalding a human body.

Description

Technical Field

[0001] The utility model belongs to the technical field of water cups, and particularly relates to a double-cover dual-purpose cup. Background Art

[0002] Some existing water cups allow drinking water through a direct drinking spout, while others allow drinking water through a straw, and users can only choose to purchase a water cup with one of the drinking methods.

[0003] Therefore, it is necessary to improve it. Utility Model Content

[0004] The utility model aims to provide a double-cover dual-purpose cup, which is provided with a direct drinking port and a straw, and a user can drink water through a first water outlet or a suction nozzle according to his / her own needs.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A double-lid dual-purpose cup comprises a cup body and a cup cover, wherein the cup cover comprises a cup cover body, an inner flip cover, an outer flip cover, a convection piece and a suction nozzle, wherein a first side edge of the cup cover body is rotatably connected to the inner flip cover, a second side edge of the cup cover body is buckled with or separated from the inner flip cover, a first side edge of the cup cover body is rotatably connected to the outer flip cover, and a second side edge of the cup cover body is buckled with or separated from the outer flip cover,

[0007] The cup cover body is provided with a first water outlet and a second water outlet, the inner flip cover is provided with a first mounting hole and a second mounting hole, the convection element is inserted in the first mounting hole, the suction nozzle is inserted in the second mounting hole, the convection element is provided with a convection hole, the suction nozzle is made of an elastic material, and a sucking channel is provided on the suction nozzle.

[0008] When the inner flip cover is buckled on the cup cover body, the lower end of the convection member abuts against the edge of the hole of the first water outlet, the convection hole corresponds to the position of the first water outlet and is connected to each other, the lower end of the suction nozzle abuts against the edge of the hole of the second water outlet, and the suction channel corresponds to the position of the second water outlet and is connected to each other.

[0009] A second snap ring is provided on the outer flip cover, a first snap ring is provided on the inner flip cover, a cover opening button is provided on the cup cover body, a compression spring is provided between the cover opening button and the cup cover body, a first slot and a second slot are provided on the cover opening button, a first hook is provided in the first slot, the first hook can be buckled with the first snap ring to put the inner flip cover in a buckled state, the second slot has a first side wall and a second side wall opposite to each other, the first side wall and the second side wall are respectively provided with a second hook and a third hook, the third hook is located above the second hook, the length of the buckling portion of the first hook is greater than the length of the buckling portion of the second hook, the second hook can be buckled with the second snap ring to put the outer flip cover in a buckled state, and the third hook can be buckled with the second snap ring to put the outer flip cover in a semi-open state

[0010] The double-lid dual-purpose cup provided by the utility model has the following beneficial effects: compared with the prior art, when both the outer flip cover and the inner flip cover are opened, water in the cup body can be poured out from the first water outlet, and the second water outlet forms a convection structure with the first water outlet, so that the drinking process is smooth; when the outer flip cover is opened and the inner flip cover is buckled, the lower end of the convection member abuts against the edge of the hole of the first water outlet, the convection hole corresponds to the position of the first water outlet and is interconnected, the lower end of the suction nozzle abuts against the edge of the hole of the second water outlet, the sucking channel corresponds to the position of the second water outlet and is interconnected, the suction nozzle can be used to drink water, and the suction nozzle and the convection hole form a convection structure The structure makes the drinking process smooth, and the user can drink water from the first water outlet or the nozzle according to his own needs; by providing a second clamping ring on the outer flip cover and a first clamping ring on the inner flip cover, a first clamping hook for buckling with the first clamping ring, a second clamping hook and a third clamping hook for buckling with the second clamping ring are provided on the opening button on the cup cover body, when the outer flip cover and the inner flip cover are buckled, the opening button is pressed for the first time, after the second clamping hook is disengaged from the second clamping ring, the third clamping hook is buckled with the second clamping ring immediately to put the outer flip cover in a semi-open state, and steam is discharged in the semi-open state to prevent hot water vapor from scalding the human body.

[0011] In one of the embodiments, the suction nozzle is tilted toward one side of the convection member. When the outer flip cover is buckled on the cup cover body, the suction nozzle is pressed between the inner bottom wall of the outer flip cover and the outer top wall of the inner flip cover, thereby closing the suction channel of the suction nozzle and blocking the convection hole with the side of the suction nozzle.

[0012] Furthermore, an upper pressure plate is provided on the inner bottom wall of the outer flip cover, and a lower pressure plate is provided on the outer top wall of the inner flip cover. The positions of the upper pressure plate and the lower pressure plate are staggered with each other in the horizontal direction. When the outer flip cover is buckled on the cup cover body, the suction nozzle is pressed by the upper pressure plate and the lower pressure plate to close the sucking channel.

[0013] In one of the embodiments, a ring-shaped direct drinking water outlet guide is provided on the top of the cup cover body, and the direct drinking water outlet guide is arranged around the outer circumference of the first water outlet and the second water outlet.

[0014] In one of the embodiments, the cup cover body is further provided with a straw, the upper end of the straw is communicated with the second water outlet, and the lower end of the straw extends to the inner bottom of the cup body.

[0015] In one of the embodiments, it also includes a pin shaft, a mounting seat is provided on the first side of the cup cover body, the inner flip cover is provided with a first connecting block and a second connecting block, the outer flip cover is provided with a third connecting block and a fourth connecting block, the mounting seat is provided with a seat hole for the pin shaft to pass through, the first connecting block, the second connecting block, the third connecting block and the fourth connecting block are all provided with through holes for the pin shaft to pass through, the mounting seat is located on the inner sides of the first connecting block and the second connecting block, the third connecting block and the fourth connecting block are located on the outer sides of the first left connecting block and the first right connecting block, and the pin shaft can pass through the third connecting block, the first connecting block, the mounting seat, the second connecting block, the first right connecting block and the fourth connecting block in sequence, so as to rotatably connect the inner flip cover, the outer flip cover and the cup cover body together.

[0016] Furthermore, a torsion spring and a limit member are provided in the seat hole of the mounting seat, the torsion spring has a first leg and a second leg, the inner side wall of the seat hole is provided with a first limit groove 1 for accommodating the first leg, the limit member is provided with a socket for inserting the second leg, the torsion spring and the limit member are placed in the seat hole and are sleeved on the outside of the pin shaft, a limit strip is provided on the side of the limit member facing the second connecting block, and a second limit groove is provided on the side of the second connecting block facing the limit member, and the limit strip is embedded in the second limit groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 The structure of the double-lid dual-purpose cup of the utility model is shown in FIG. Figure 1 At this time, the inner cover and the flip cover are both buckled on the cup cover body;

[0019] Figure 2 for Figure 1 A longitudinal cross-sectional view of the dual-purpose cup with double lid;

[0020] Figure 3 The structure of the double-lid dual-purpose cup of the utility model is shown in FIG. Figure 2 At this time, the outer flip cover is in a half-open state, and the inner flip cover is still buckled on the cup cover body;

[0021] Figure 4 for Figure 3 A longitudinal cross-sectional view of the dual-purpose cup with double lid;

[0022] Figure 5 The structure of the double-lid dual-purpose cup of the utility model is shown in FIG. Figure 3 At this time, the outer flip cover is opened and the inner flip cover is buckled on the cup cover body;

[0023] Figure 6 for Figure 5 A longitudinal cross-sectional view of the dual-purpose cup with double lid;

[0024] Figure 7 The structure of the double-lid dual-purpose cup of the utility model is shown in FIG. Figure 4 , at this time, the inner cover and the flip cover are both opened;

[0025] Figure 8 for Figure 7 A longitudinal cross-sectional view of the dual-purpose cup with double lid;

[0026] Fig. 9 This is an exploded schematic diagram of a double-lid dual-purpose cup according to another embodiment of the present invention.

[0027] Fig.10 This is a schematic diagram of the connection between the cup cover body, the inner flip cover and the outer flip cover of a double-lid dual-purpose cup according to another embodiment of the utility model.

[0028] Among them, the reference numerals in the figure are:

[0029] 1. Cup cover body; 10. Button seat groove; 11. Direct drinking water outlet guide; 12. Mounting seat; 120. Seat hole; 1200. First limiting groove; 101. First water outlet; 102. Second water outlet; 2. Inner flip cover; 201. First connecting block; 202. Second connecting block; 2020. Second limiting groove; 203. Lower pressure plate; 21. First clamp ring; 3. Outer flip cover; 301. Upper pressure plate; 32. Second clamp ring ; 4. cup body; 5. suction nozzle; 50. suction channel; 6. convection part; 60. convection hole; 7. cover opening button; 701. first slot; 702. second slot; 71. first hook; 72. second hook; 73. third hook; 74. compression spring; 8. straw; 9. pin; 91. torsion spring; 911. first leg; 912. second leg; 92. limit part; 920. jack; 921. limit strip. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship 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.

[0032] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figures 1-2 As shown, the double-lid dual-purpose cup provided by the utility model comprises a cup body 4 and a cup cover, wherein the cup cover comprises a cup cover body 1, an inner flip cover 2, an outer flip cover 3, a convection member 6 and a suction nozzle 5. The first side of the cup cover body 1 is rotatably connected to the inner flip cover 2, the second side of the cup cover body 1 is buckled with or separated from the inner flip cover 2, the first side of the cup cover body 1 is rotatably connected to the outer flip cover 3, and the second side of the cup cover body 1 is buckled with or separated from the outer flip cover 3.

[0035] The cup cover body 1 is provided with a first water outlet 101 and a second water outlet 102, the inner flip cover is provided with a first mounting hole and a second mounting hole, the convection member 6 is inserted into the first mounting hole, and the suction nozzle 5 is inserted into the second mounting hole. The convection member 6 is provided with a convection hole 60, the suction nozzle 5 is made of an elastic material, and the suction nozzle 5 is provided with a sucking channel 50.

[0036] When the inner flip cover 2 is buckled onto the cup cover body 1, the lower end of the convection member 6 abuts against the edge of the hole of the first water outlet 101, the convection hole 60 corresponds to the position of the first water outlet 101 and is interconnected, the lower end of the suction nozzle 5 abuts against the edge of the hole of the second water outlet 102, and the sucking channel 50 corresponds to the second water outlet position 102 and is interconnected.

[0037] The suction nozzle 5 is inclined toward the convection member 6. When the outer flip cover 3 is buckled on the cup cover body 1, the suction nozzle 5 is pressed between the inner bottom wall of the outer flip cover 3 and the outer top wall of the inner flip cover 2, thereby closing the suction channel 50 of the suction nozzle 5, and the side of the suction nozzle 5 blocks the convection hole 60.

[0038] See also Figure 5 , Figure 7 and Fig. 9 The outer flip cover 3 is provided with a second snap ring 32, the inner flip cover 2 is provided with a first snap ring 21, the cup cover body 1 is provided with a cover opening button 7, and a compression spring 74 is provided between the cover opening button 7 and the cup cover body 1. Specifically, a button seat groove 10 for accommodating the cover opening button 7 is provided on the second side of the cup cover body 1, and the compression spring 74 is placed between the bottom of the button seat groove 10 and the cover opening button 7. The cover opening button 7 is provided with a first slot 701 and a second slot 702. The first slot 701 is provided with a first hook 71. The first hook 71 can be buckled with the first snap ring 21 to put the inner flip cover 2 in a buckled state. The second slot 702 has a first side wall and a second side wall opposite to each other. The first side wall and the second side wall are respectively provided with a second hook 72 and a third hook 73. The third hook 73 is located above the second hook 72. The length of the buckling part of the first hook 71 is greater than the length of the buckling part of the second hook 72. The second hook 72 can be buckled with the second snap ring 32 to put the outer flip cover 3 in a buckled state. The third hook 73 can be buckled with the second snap ring 32 to put the outer flip cover 3 in a semi-open state.

[0039] See also Figure 1 and Figure 2 When the outer flip cover 3 and the inner flip cover 2 are both fastened to the cup cover body 1, the cover opening button 7 is pressed for the first time, and the second hook 72 is disengaged from the second snap ring 32, and then the third hook 83 is fastened with the second snap ring 32 to make the outer flip cover in Figure 3 and Figure 4 In the semi-open state shown, steam is exhausted in the semi-open state to prevent the hot water vapor from scalding the human body. At this time, under the elastic force of the suction nozzle 5, and because the length of the buckling portion of the first hook 71 is greater than the length of the buckling portion of the second hook 72, when the second hook 72 is disengaged from the second snap ring 32, the first hook 71 and the first snap ring 21 are still in a buckling state, so that the inner flip cover 2 cannot be opened; release the cover opening button 7, the third hook 73 is disengaged from the second snap ring 32, and under the elastic force of the straw 5, the outer flip cover 3 is opened upward (as shown in FIG. Figure 5 and Figure 6Press the cover opening button 7 for the second time, the first hook 71 is disengaged from the first snap ring 21, and the inner flip cover 2 is opened (as shown in FIG. Figure 7 and Figure 8 shown).

[0040] The double-lid dual-purpose cup provided by the utility model has the following beneficial effects: when the outer flip cover 3 and the inner flip cover 2 are both opened, the water in the cup body 4 can be poured out from the first water outlet 101, and the second water outlet 102 forms a convection structure with the first water outlet 101, so that the drinking process is smooth; when the outer flip cover 3 is opened and the inner flip cover 2 is buckled, the lower end of the convection member 6 abuts against the edge of the opening of the first water outlet 101, the convection hole 60 corresponds to the position of the first water outlet 101 and is interconnected, the lower end of the suction nozzle 5 abuts against the edge of the opening of the second water outlet 102, the suction channel 50 corresponds to the position of the second water outlet 102 and is interconnected, the suction nozzle 5 can be used to drink water, and the suction nozzle 5 and the convection hole 60 form a convection structure, so that the drinking process is smooth. The water flow is smooth, and the user can drink water from the first water outlet 101 or the nozzle 5 according to their needs; by providing a second snap ring 32 on the outer flip cover 3, and a first snap ring 21 on the inner flip cover 2, a first hook 71 for engaging with the first snap ring 21, a second hook 72 and a third hook 73 for engaging with the second snap ring 32 are provided on the opening button 7 on the cup cover body 1. When the outer flip cover 3 and the inner flip cover 2 are both engaged, the opening button 7 is pressed for the first time. After the second hook 72 is disengaged from the second snap ring 32, the third hook 73 is engaged with the second snap ring 32 to put the outer flip cover 3 in a semi-open state, and steam is exhausted in the semi-open state to prevent hot water vapor from scalding the human body.

[0041] In one embodiment, see Figure 2 and Fig. 9 An upper pressing plate 301 is provided on the inner bottom wall of the outer flip cover 3, and a lower pressing plate 203 is provided on the outer top wall of the inner flip cover 2. The positions of the upper pressing plate 301 and the lower pressing plate 203 are staggered with each other in the horizontal direction. When the outer flip cover 2 is buckled on the cup cover body 1, the suction nozzle 5 is pressed by the upper pressing plate 301 and the lower pressing plate 203 to close the sucking channel 50.

[0042] In one embodiment, see ,7 and Figure 8 A ring-shaped direct drinking water outlet guide 11 is provided on the top of the cup cover body 1, and the direct drinking water outlet guide 11 is arranged around the outer circumference of the first water outlet 101 and the second water outlet 102. The direct drinking water outlet guide 11 can guide the water outlet when drinking water.

[0043] In one embodiment, see Figure 2 The cup cover body 1 is also provided with a straw 8 , the upper end of the straw 8 is communicated with the second water outlet 102 , and the lower end of the straw 8 extends to the inner bottom of the cup body 4 .

[0044] In one embodiment, see Figure 7 and Fig.10 The double-lid dual-purpose cup also includes a pin 9, a mounting seat 12 is provided on the first side of the cup cover body 1, the inner flip cover 2 is provided with a first connecting block 201 and a second connecting block 202, and the outer flip cover 3 is provided with a third connecting block 303 and a fourth connecting block 304, the mounting seat 12 is provided with a seat hole 120 for the pin 9 to pass through, and the first connecting block 201, the second connecting block 202, the third connecting block 303, and the fourth connecting block 304 are all provided with a through hole for the pin 9 to pass through, the mounting seat 12 is located on the inner side of the first connecting block 201 and the second connecting block 202, the third connecting block 303 and the fourth connecting block 304 are located on the outer side of the first left connecting block 201 and the first right connecting block 202, and the pin 9 can pass through the third connecting block 303, the first connecting block 201, the mounting seat, the second connecting block 202, the first right connecting block, and the fourth connecting block 304 in sequence, so that the inner flip cover 2, the outer flip cover 3 and the first side of the cup cover body 1 can be rotatably connected together.

[0045] Furthermore, a torsion spring 91 and a limiting member 92 are also provided in the seat hole 120 of the mounting seat 12. The torsion spring 91 has a first leg 911 and a second leg 912. The inner side wall of the seat hole 120 is provided with a first limiting groove 1200 for accommodating the first leg 911. The limiting member 92 is provided with a plug hole 920 for inserting the second leg 912. The torsion spring 91 and the limiting member 92 are placed in the seat hole 120 and sleeved outside the pin shaft 9. A limiting strip 921 is provided on the side of the limiting member 92 facing the second connecting block 202. A second limiting groove 2020 is provided on the side of the second connecting block 202 facing the limiting member 92. The limiting strip 921 is embedded in the second limiting groove 2020. Thus, the first leg 911 of the torsion spring 91 is constrained by the mounting seat 12, the second leg 912 of the torsion spring 91 is constrained by the second connecting block 202, and the elastic restoring force of the torsion spring 91 is used to make the inner flip cover 2 pop outward.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-lid dual-purpose cup, characterized in that: The cup body and the cup cover include a cup cover body, an inner flip cover, an outer flip cover, a convection element and a nozzle. The first side of the cup cover body is rotatably connected to the inner flip cover, the second side of the cup cover body is buckled or separated from the inner flip cover, the first side of the cup cover body is rotatably connected to the outer flip cover, the second side of the cup cover body is buckled or separated from the outer flip cover, The cup cover body is provided with a first water outlet and a second water outlet, the inner flip cover is provided with a first mounting hole and a second mounting hole, the convection element is inserted in the first mounting hole, the suction nozzle is inserted in the second mounting hole, the convection element is provided with a convection hole, the suction nozzle is made of an elastic material, and a sucking channel is provided on the suction nozzle. When the inner flip cover is buckled on the cup cover body, the lower end of the convection member abuts against the edge of the hole of the first water outlet, the convection hole corresponds to the position of the first water outlet and is connected to each other, the lower end of the suction nozzle abuts against the edge of the hole of the second water outlet, and the suction channel corresponds to the position of the second water outlet and is connected to each other. A second snap ring is provided on the outer flip cover, a first snap ring is provided on the inner flip cover, a cover opening button is provided on the cup cover body, a compression spring is provided between the cover opening button and the cup cover body, a first slot and a second slot are provided on the cover opening button, a first hook is provided in the first slot, the first hook can be engaged with the first snap ring to put the inner flip cover in a engaged state, the second slot has a first side wall and a second side wall opposite to each other, the first side wall and the second side wall are respectively provided with a second hook and a third hook, the third hook is located above the second hook, the length of the engaging portion of the first hook is greater than the length of the engaging portion of the second hook, the second hook can be engaged with the second snap ring to put the outer flip cover in a engaged state, and the third hook can be engaged with the second snap ring to put the outer flip cover in a semi-open state.

2. The double-lid dual-purpose cup according to claim 1, characterized in that: The suction nozzle is inclined toward one side of the convection member. When the outer flip cover is buckled on the cup cover body, the suction nozzle is pressed between the inner bottom wall of the outer flip cover and the outer top wall of the inner flip cover, thereby closing the suction channel of the suction nozzle and blocking the convection hole on the side of the suction nozzle.

3. The double-lid dual-purpose cup according to claim 2, characterized in that: An upper pressing plate is arranged on the inner bottom wall of the outer flip cover, and a lower pressing plate is arranged on the outer top wall of the inner flip cover. The positions of the upper pressing plate and the lower pressing plate are staggered with each other in the horizontal direction. When the outer flip cover is buckled on the cup cover body, the suction nozzle is pressed by the upper pressing plate and the lower pressing plate to close the sucking channel.

4. The double-lid dual-purpose cup according to claim 1, characterized in that: A ring-shaped direct drinking water outlet guide is arranged on the top of the cup cover body, and the direct drinking water outlet guide is arranged around the outer peripheral sides of the first water outlet and the second water outlet.

5. The double-lid dual-purpose cup according to claim 1, characterized in that: The cup cover body is also provided with a straw, the upper end of the straw is communicated with the second water outlet, and the lower end of the straw extends to the inner bottom of the cup body.

6. The double-lid dual-purpose cup according to claim 1, characterized in that: It also includes a pin shaft, a mounting seat is provided on the first side of the cup cover body, the inner flip cover is provided with a first connecting block and a second connecting block, the outer flip cover is provided with a third connecting block and a fourth connecting block, the mounting seat is provided with a seat hole for the pin shaft to pass through, the first connecting block, the second connecting block, the third connecting block and the fourth connecting block are all provided with through holes for the pin shaft to pass through, the mounting seat is located on the inner sides of the first connecting block and the second connecting block, the third connecting block and the fourth connecting block are located on the outer sides of the first left connecting block and the first right connecting block, and the pin shaft can pass through the third connecting block, the first connecting block, the mounting seat, the second connecting block, the first right connecting block and the fourth connecting block in sequence, so as to rotatably connect the inner flip cover, the outer flip cover and the cup cover body together.

7. The double-lid dual-purpose cup according to claim 6, characterized in that: A torsion spring and a limit member are also provided in the seat hole of the mounting seat, the torsion spring has a first leg and a second leg, the inner side wall of the seat hole is provided with a first limit groove for accommodating the first leg, the limit member is provided with a socket for inserting the second leg, the torsion spring and the limit member are placed in the seat hole and sleeved on the outside of the pin shaft, a limit strip is provided on the side of the limit member facing the second connecting block, a second limit groove is provided on the side of the second connecting block facing the limit member, and the limit strip is embedded in the second limit groove.

Images