A bathroom fan

Abstract

The utility model discloses a bathroom fan, which includes a fan body, an adjustment component and a swing block, wherein the bottom side wall of the fan body is provided with a flange portion, the adjustment component is arranged on the fan body, the swing block is arranged on the adjustment component and is located on the outside of the fan body, the swing block and the flange portion are arranged up and down, wherein the adjustment component can drive the swing block to rotate to an avoidance state or an abutment state, and can drive the swing block to move up and down to adjust the distance between it and the flange portion. Through the above structure, on the one hand, when there is a certain degree of deviation in the thickness of the suspended ceiling, the adjustment component can drive the swing block to move down until it and the flange portion clamp the suspended ceiling together to overcome the above deviation, thereby ensuring the installation stability of the bathroom fan when it is installed on the suspended ceiling; on the other hand, the adjustment component can drive the swing block to move up and down to adjust the distance between it and the flange portion, so that the bathroom fan can adapt to installation on suspended ceilings of different thicknesses, thereby improving the versatility of the bathroom fan.

Description

Technical Field

[0001] The utility model relates to the field of bathroom appliances, in particular to a bathroom fan. Background Art

[0002] Bathroom fan (bathroom heater) is a bathroom appliance that integrates heating, ventilation, lighting and other functions. In the existing technology, the steps of installing a bathroom fan on a suspended ceiling are: 1. Insert the bathroom fan through the reserved hole of the suspended ceiling, so that the convex edge of the bathroom fan abuts against the bottom of the suspended ceiling, and move the swing block on the outside of the bathroom fan to the top of the suspended ceiling; 2. Rotate the swing block to abut against the suspended ceiling, and the convex edge and the swing block jointly clamp the suspended ceiling. However, in the actual installation process, due to a certain degree of deviation in the thickness of the suspended ceiling, there will be a corresponding gap between the convex edge of the bathroom fan and the suspended ceiling, and the convex edge and the swing block cannot really clamp the suspended ceiling, so the installation stability of the bathroom fan on the suspended ceiling will be reduced. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a bathroom fan which can ensure the installation stability when installed on a suspended ceiling.

[0004] A bathroom fan according to an embodiment of the utility model includes a fan body, an adjusting component and a swing block, wherein the bottom side wall of the fan body is provided with a flange portion, the adjusting component is arranged on the fan body, the swing block is arranged on the adjusting component and is located on the outside of the fan body, the swing block and the flange portion are arranged up and down, wherein the adjusting component can drive the swing block to rotate to an avoidance state or abutment state, and can drive the swing block to move up and down to adjust the distance between it and the flange portion.

[0005] A bathroom fan according to an embodiment of the utility model has at least one of the following beneficial effects:

[0006] The bottom side wall of the fan body of the bathroom fan of the utility model embodiment is provided with a convex edge portion, the adjustment component is arranged on the fan body, the swing block is arranged on the adjustment component and is located on the outside of the fan body, the swing block and the convex edge portion are arranged up and down, the adjustment component can drive the swing block to rotate to an avoidance state or abutment state, and can drive the swing block to move up and down to adjust the distance between it and the convex edge portion.

[0007] In this regard, the steps for installing the above-mentioned bathroom fan on the suspended ceiling are: 1. Rotate the pendulum block to an avoidance state through the adjustment component, and insert the bathroom fan into the reserved hole of the suspended ceiling so that the convex edge abuts against the bottom of the suspended ceiling, and move the pendulum block to the top of the suspended ceiling; 2. Rotate the pendulum block to an abutment state; 3. Move the pendulum block down to abut against the top of the suspended ceiling through the adjustment component, and the pendulum block and the convex edge jointly clamp the suspended ceiling.

[0008] Through the above structure, on the one hand, when there is a certain degree of deviation in the thickness of the suspended ceiling, the adjusting component can drive the pendulum block to move downward until it clamps the suspended ceiling together with the flange to overcome the above deviation, thereby ensuring the installation stability of the bathroom fan when it is installed on the suspended ceiling; on the other hand, the adjusting component can drive the pendulum block to move up and down to adjust the distance between it and the flange, so that the bathroom fan can adapt to installation on suspended ceilings of different thicknesses, thereby improving the versatility of the bathroom fan.

[0009] According to some embodiments of the utility model, the adjusting assembly includes a rotating member and a connecting member, the rotating member is rotatably provided on the fan body, the connecting member is rotatably provided on the rotating member, the pendulum block is sequentially sleeved on the connecting member and the rotating member, the connecting member is threadedly connected to the pendulum block, wherein the rotating member can rotate to drive the pendulum block to rotate to the avoidance state or the abutment state, and the connecting member can rotate to drive the pendulum block to move up and down.

[0010] According to some embodiments of the utility model, the rotating member and the connecting member are both in a bar structure, the rotating member is rotatably inserted into the fan body, and the connecting member is rotatably inserted into the rotating member.

[0011] According to some embodiments of the utility model, the pendulum block is provided with a sleeve cavity, and the pendulum block is sequentially sleeved on the connecting member and the rotating member through the sleeve cavity, and the sleeve cavity has a first cavity section and a second cavity section arranged up and down, the cavity wall of the first cavity section is threadedly connected to the connecting member, and one of the cavity wall of the second cavity section and the side wall of the rotating member is provided with a linkage block, and the other is provided with a linkage groove, and the linkage block is slidably arranged in the linkage groove.

[0012] According to some embodiments of the utility model, the fan body is provided with a accommodating cavity, the accommodating cavity has an opening arranged downward, and the rotating member and the connecting member are partially located in the accommodating cavity, wherein the portion of the rotating member located in the accommodating cavity can rotate to drive the rotating member as a whole to rotate, and the portion of the connecting member located in the accommodating cavity can rotate to drive the connecting member as a whole to rotate.

[0013] According to some embodiments of the utility model, the flange portion is provided with a mask component located below the opening, the mask component is provided with a first through hole, the bottom of the accommodating cavity is connected to a heating component, and the heating component is passed through the first through hole to partially extend below the mask component.

[0014] According to some embodiments of the present invention, the maximum distance between the portion of the warm lamp component located below the mask component and the mask component is A, wherein 1cm≤A≤5cm.

[0015] According to some embodiments of the present invention, a first temperature control component is provided at the bottom of the accommodating cavity, and the first temperature control component is electrically connected to the heating lamp component.

[0016] According to some embodiments of the utility model, a fan assembly is provided at the bottom of the accommodating cavity, the fan assembly is provided with a driving component, the fan body is provided with a second temperature control component, and the driving component is electrically connected to the second temperature control component.

[0017] According to some embodiments of the utility model, a groove is provided on the bottom side wall of the fan body, wherein when the pendulum block rotates to the abutment state, the pendulum block swings out of the groove, and when the pendulum block rotates to the avoidance state, the pendulum block swings back into the groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 This is a structural diagram of an embodiment of a bathroom fan of the utility model;

[0020] Figure 2 for Figure 1 A partial exploded view of the bathroom fan shown in;

[0021] Figure 3 for Figure 1 A cross-sectional view of a bathroom fan shown in ;

[0022] Figure 4 for Figure 2 A partial exploded view of the adjustment assembly and the pendulum block shown in FIG.

[0023] Figure 5 for Figure 2 The structural diagram of the adjustment assembly and the pendulum block shown in ;

[0024] Figure 6 for Figure 1 Another structural diagram of the bathroom fan shown in .

[0025] Reference numerals:

[0026] The fan body 100, the convex edge portion 110, the accommodating cavity 120, the opening 121, the mounting platform 122, the mounting hole 122A, the avoidance gap 122A1, the positioning groove 122B, and the groove 130;

[0027] Adjustment assembly 200, rotating member 210, linkage block 211, rotating piece 212, positioning block 212A, anti-dropping block 213, connecting member 220;

[0028] The pendulum block 300, the sleeve cavity 310, the first cavity section 311, the second cavity section 312, and the linkage groove 312A;

[0029] The mask member 400 and the first through hole 410;

[0030] Warm lamp parts 500;

[0031] A first temperature control unit 600;

[0032] Fan assembly 700;

[0033] Elastic member 800. DETAILED DESCRIPTION

[0034] 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.

[0035] In the description of the utility model, if there is a description of first, second, third, fourth, fifth, etc., it is only 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.

[0036] 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.

[0037] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0038] Reference Figures 1 to 6 An embodiment of the utility model provides a bathroom fan, which includes a fan body 100 , an adjustment component 200 and a swing block 300 .

[0039] The bottom side wall of the fan body 100 is provided with a flange portion 110, the adjustment component 200 is provided on the fan body 100, the pendulum block 300 is provided on the adjustment component 200 and is located on the outside of the fan body 100, the pendulum block 300 and the flange portion 110 are arranged up and down, wherein the adjustment component 200 can drive the pendulum block 300 to rotate to an avoidance state or abutment state, and can drive the pendulum block 300 to move up and down to adjust the distance between it and the flange portion 110.

[0040] It is understandable that, when the bathroom fan is inserted into the reserved hole of the suspended ceiling, the pendulum block 300 rotated to the avoidance state does not come into contact with the suspended ceiling, so that it can move through the reserved hole and move above the suspended ceiling.

[0041] The steps for installing the above-mentioned bathroom fan on the suspended ceiling are: 1. Rotate the pendulum component 300 to the avoidance state through the adjustment component 200, and insert the bathroom fan into the reserved hole of the suspended ceiling, so that the flange portion 110 abuts against the bottom of the suspended ceiling, and move the pendulum component 300 to the top of the suspended ceiling; 2. Rotate the pendulum component 300 to the abutment state; 3. Move the pendulum component 300 down to abut against the top of the suspended ceiling through the adjustment component 200, and the pendulum component 300 and the flange portion 110 jointly clamp the suspended ceiling.

[0042] Through the above structure, on the one hand, when there is a certain degree of deviation in the thickness of the suspended ceiling, the adjustment component 200 can drive the pendulum block 300 to move downward until it and the flange portion 110 clamp the suspended ceiling together to overcome the above deviation, thereby ensuring the installation stability of the bathroom fan when it is installed on the suspended ceiling; on the other hand, the adjustment component 200 can drive the pendulum block 300 to move up and down to adjust the distance between it and the flange portion 110, so that the bathroom fan can adapt to installation on suspended ceilings of different thicknesses, thereby improving the versatility of the bathroom fan.

[0043] It can be understood that the steps for disassembling the above-mentioned bathroom fan from the ceiling are: 1. Move the pendulum component 300 upward to cancel the contact with the ceiling through the adjustment component 200; 2. Rotate the pendulum component 300 to an evasive state through the adjustment component 200; 3. Remove the bathroom fan from the reserved hole of the ceiling.

[0044] In this embodiment, the number of the adjusting components 200 and the number of the pendulum components 300 are both four. The four pendulum components 300 are disposed on four sides of the fan body 100 , and the four pendulum components 300 are disposed on the four adjusting components 200 in a one-to-one correspondence.

[0045] The adjustment assembly 200 includes a rotating member 210 and a connecting member 220 .

[0046] Reference Figures 3 to 5The rotating member 210 is rotatably disposed on the fan body 100, the connecting member 220 is rotatably disposed on the rotating member 210, and the pendulum member 300 is sequentially sleeved on the connecting member 220 and the rotating member 210, and the connecting member 220 is threadedly connected to the pendulum member 300, wherein the rotating member 210 can rotate to drive the pendulum member 300 to rotate to an avoidance state or abutment state, and the connecting member 220 can rotate to drive the pendulum member 300 to move up and down.

[0047] It should be noted that moving up and down means moving up or down.

[0048] In this embodiment, refer to Figures 3 to 5 The rotating member 210 and the connecting member 220 are both bar structures. The rotating member 210 is rotatably disposed in the fan body 100 , and the connecting member 220 is rotatably disposed in the rotating member 210 .

[0049] The pendulum member 300 is sequentially sleeved on the connecting member 220 and the rotating member 210, and the connecting member 220 is threadedly connected to the pendulum member 300. For details, refer to Figures 3 to 5 The pendulum block 300 is provided with a sleeve cavity 310, and the pendulum block 300 is sequentially sleeved on the connecting member 220 and the rotating member 210 through the sleeve cavity 310. The sleeve cavity 310 has a first cavity section 311 and a second cavity section 312 arranged up and down. The cavity wall of the first cavity section 311 is threadedly connected with the connecting member 220, and the side wall of the rotating member 210 is provided with a linkage block 211. The cavity wall of the second cavity section 312 is provided with a linkage groove 312A, and the linkage block 211 is slidably arranged in the linkage groove 312A.

[0050] It can be understood that when the rotating member 210 rotates, the rotating member 210 presses against the groove wall of the linkage groove 312A through the linkage block 211 to drive the pendulum member 300 to rotate to the avoidance state or the abutment state.

[0051] It is understandable that under the action of the linkage block 211 and the linkage groove 312A, the swing block 300 does not rotate with the rotation of the connecting member 220, but moves up and down with the rotation of the connecting member 220. When the swing block 300 moves up and down, the linkage block 211 slides relatively in the linkage groove 312A.

[0052] In some embodiments, the linkage groove 312A is disposed on a side wall of the rotating member 210 , and the linkage block 211 is disposed on a cavity wall of the second cavity section 312 .

[0053] In some embodiments, the rotating member 210 is a bar structure with a rectangular cross section, and the second cavity section 312 cooperates with the rotating member 210. Through the above structure, the linkage between the rotating member 210 and the swing block 300 can be realized without designing the linkage block 211 and the linkage groove 312, and the swing block 300 can be moved up and down under the rotation of the connecting member 220.

[0054] In this embodiment, refer to Figure 2 The fan body 100 is provided with a accommodating cavity 120, and the accommodating cavity 120 has an opening 121 arranged downwardly, and the rotating member 210 and the connecting member 220 are both partially located in the accommodating cavity 120, wherein the portion of the rotating member 210 located in the accommodating cavity 120 can rotate to drive the overall rotating member 210 to rotate, and the portion of the connecting member 220 located in the accommodating cavity 120 can rotate to drive the overall connecting member 220 to rotate.

[0055] It can be understood that when the bathroom fan is passed through the reserved hole in the ceiling, so that the pendulum block 300 is moved to the top of the ceiling, on the one hand, the user can drive the rotating member 210 located in the accommodating cavity 120 to rotate partially through the opening 121, so as to drive the overall rotating member 210 to rotate, and drive the pendulum block 300 to rotate to an avoidance state or abutment state; on the other hand, the user can also drive the connecting member 220 located in the accommodating cavity 120 to rotate partially through the opening 121, so as to drive the overall connecting member 220 to rotate, and drive the pendulum block 300 to move up and down.

[0056] Through the above structure, the arrangement of the accommodating cavity 120 and the opening 121 can facilitate the user to drive the pendulum block 300 located above the ceiling to rotate or move up and down.

[0057] The rotating member 210 is rotatably disposed on the fan body 100. For details, refer to Figure 2 and Figure 4 A mounting platform 122 is provided in the accommodating cavity 120, and a mounting hole 122A is provided on the mounting platform 122 for connecting the accommodating cavity 120 with the outside of the fan body 100. An avoidance notch 122A1 is provided on the hole wall of the mounting hole 122A. A rotating piece 212 is provided at one end of the rotating member 210. The rotating member 210 is passed through the mounting hole 122A, so that the linkage block 211 moves to the outside of the fan body 100 through the avoidance notch 122A1. The linkage block 211 and the rotating piece 212 are respectively arranged on both sides of the mounting platform 122, and the rotating piece 212 is located in the accommodating cavity 120.

[0058] It is understandable that the rotating member 210 is located in the portion of the accommodating cavity 120 , which includes the rotating piece portion 212 ; the rotating piece portion 212 cannot pass through the mounting hole 122A due to size factors.

[0059] The steps for installing the rotating member 210 on the fan body 100 are: 1. When the linkage block 211 corresponds to the avoidance gap 122A1, the rotating member 210 is inserted into the installation hole 122A to move the linkage block 211 to the outside of the fan body 100; 2. Rotate the rotating member 210 to move the linkage block 211 away from the avoidance gap 122A1.

[0060] The steps of disassembling the rotating member 210 from the fan body 100 are as follows: 1. Rotate the rotating member 210 so that the linkage block 211 corresponds to the avoidance gap 122A1; 2. Pull the rotating member 210 out of the mounting hole 122A.

[0061] Through the above structure, the rotating member 210 can be detachably arranged on the fan body 100 to facilitate the replacement and maintenance of the rotating member 210.

[0062] In this embodiment, refer to Figures 3 to 5 There are two avoidance notches 122A1, and the side wall of the rotating member 210 is provided with an anti-slip block 213. The rotating member 210 is penetrated through the mounting hole 122A, so that the linkage block 211 and the anti-slip block 213 are respectively moved to the outside of the fan body 100 through the two avoidance notches 122A1, and the anti-slip block 213 and the rotating piece 212 are also arranged on both sides of the mounting platform 122.

[0063] In order to position the pendulum member 300 in the abutment state, refer to Figure 4 and Figure 5 The mounting platform 122 is provided with a positioning groove 122B, and the rotating piece 212 is provided with a positioning block 212A. When the swing block 300 rotates to the abutting state, the positioning block 212A is inserted into the positioning groove 122B.

[0064] In this embodiment, refer to Figure 1 and Figure 3 A groove 130 is provided on the bottom side wall of the fan body 100, and the mounting hole 122A connects the accommodating cavity 120 and the groove 130, wherein when the pendulum block 300 rotates to the abutting state, the pendulum block 300 swings out of the groove 130, and when the pendulum block 300 rotates to the avoiding state, the pendulum block 300 swings back into the groove 130.

[0065] Through the above structure, the swing block 300 swings back to the groove 130, so as to reduce the space occupied by the overall bathroom fan and reduce the transportation cost.

[0066] In this embodiment, refer to Figure 2 and Figure 6 The convex edge portion 110 is provided with a mask component 400 located below the opening 121, the mask component 400 is provided with a first through hole 410, and the bottom of the accommodating cavity 120 is connected with a heater component 500, the heater component 500 is passed through the first through hole 410 to partially extend below the mask component 400, wherein the maximum distance between the portion of the heater component 500 located below the mask component 400 and the mask component 400 is A, wherein 1cm≤A≤5cm.

[0067] With the above structure, 1cm≤A≤5cm, that is, the portion of the warm lamp component 500 protruding from the mask component 400 is extremely small, and the user's perception of the bathroom fan is improved.

[0068] In this embodiment, the mask component 400 and the flange portion 110 are detachably connected via a snap-fit ​​structure and / or a magnetic structure.

[0069] In order to reduce the probability of the mask member 400 being separated from the flange portion 110, refer to Figure 2 The bottom of the accommodating cavity 120 is connected with an elastic member 800, and the elastic member 800 is connected to the mask member 400. The elastic member 800 is configured as a tension spring member.

[0070] In this embodiment, refer to Figure 2 A first temperature control unit 600 is provided at the bottom of the accommodating cavity 120 , and the first temperature control unit 600 is electrically connected to the heating lamp 500 .

[0071] When the temperature in the accommodating cavity 120 is too high, the first temperature control unit 600 can stop the heating lamp 500 from working to reduce the probability of a safety accident.

[0072] In this embodiment, refer to Figure 2 A fan assembly 700 is provided at the bottom of the accommodating cavity 120, the fan assembly 700 is provided with a driving component, the fan body 100 is provided with a second temperature control component, and the driving component is electrically connected to the second temperature control component.

[0073] When the temperature in the accommodating chamber 120 is too high, the second temperature control unit can stop the driving component from working, so as to reduce the probability of driving component failure.

[0074] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A bathroom fan, characterized in that: include The fan body (100) has a convex edge portion (110) on the bottom side wall; An adjustment component (200) is arranged on the fan body (100); The swing block (300) is provided on the adjustment assembly (200) and is located outside the fan body (100). The swing block (300) and the flange portion (110) are arranged vertically. The adjustment component (200) can drive the pendulum component (300) to rotate to an avoidance state or an abutment state, and can drive the pendulum component (300) to move up and down to adjust the distance between it and the flange portion (110).

2. A bathroom fan according to claim 1, characterized in that: The adjustment component (200) comprises: A rotating member (210) rotatably disposed on the fan body (100); The connecting member (220) is rotatably disposed on the rotating member (210), the pendulum member (300) is sequentially sleeved on the connecting member (220) and the rotating member (210), and the connecting member (220) is threadedly connected to the pendulum member (300), wherein: The rotating member (210) can rotate to drive the swing block (300) to rotate to the avoidance state or the abutment state. The connecting member (220) is capable of rotating to drive the pendulum member (300) to move up and down.

3. A bathroom fan according to claim 2, characterized in that: The rotating member (210) and the connecting member (220) are both bar structures; the rotating member (210) is rotatably inserted into the fan body (100); and the connecting member (220) is rotatably inserted into the rotating member (210).

4. A bathroom fan according to claim 3, characterized in that: The pendulum block (300) is provided with a sleeve cavity (310), and the pendulum block (300) is sequentially sleeved on the connecting member (220) and the rotating member (210) through the sleeve cavity (310), and the sleeve cavity (310) has a first cavity section (311) and a second cavity section (312) arranged up and down, and the cavity wall of the first cavity section (311) is threadedly connected to the connecting member (220), and one of the cavity wall of the second cavity section (312) and the side wall of the rotating member (210) is provided with a linkage block (211), and the other is provided with a linkage groove (312A), and the linkage block (211) is slidably arranged in the linkage groove (312A).

5. A bathroom fan according to claim 2, characterized in that: The fan body (100) is provided with a receiving cavity (120), the receiving cavity (120) has an opening (121) arranged downward, the rotating member (210) and the connecting member (220) are both partially located in the receiving cavity (120), wherein: The portion of the rotating member (210) located in the accommodating cavity (120) is capable of rotating, so as to drive the entire rotating member (210) to rotate. The portion of the connecting member (220) located in the accommodating cavity (120) is rotatable, so as to drive the entire connecting member (220) to rotate.

6. A bathroom fan according to claim 5, characterized in that: The flange portion (110) is provided with a mask component (400) located below the opening (121), and the mask component (400) is provided with a first through hole (410). The bottom of the accommodating cavity (120) is connected to a heating component (500), and the heating component (500) is passed through the first through hole (410) to partially extend below the mask component (400).

7. A bathroom fan according to claim 6, characterized in that: The maximum distance between the portion of the heating lamp component (500) located below the mask component (400) and the mask component (400) is A, wherein 1 cm ≤ A ≤ 5 cm.

8. A bathroom fan according to claim 6, characterized in that: A first temperature control unit (600) is provided at the bottom of the accommodating cavity (120), and the first temperature control unit (600) is electrically connected to the heating lamp (500).

9. A bathroom fan according to claim 5, characterized in that: A fan assembly (700) is provided at the bottom of the accommodating cavity (120), the fan assembly (700) is provided with a driving component, the fan body (100) is provided with a second temperature control component, and the driving component is electrically connected to the second temperature control component.

10. A bathroom fan according to claim 1, characterized in that: The bottom side wall of the fan body (100) is provided with a groove (130), wherein: When the swing block (300) rotates to the abutting state, the swing block (300) swings out of the groove (130). When the pendulum block (300) rotates to the avoidance state, the pendulum block (300) swings and retracts into the groove (130).

Images