Pseudo-classic architecture supporting and picking window

Abstract

The utility model discloses a pseudo-classic building support window, which relates to the technical field of pseudo-classic buildings, and comprises a wall body and a support window, a frame is fixed on the surface of the wall body, a shaft lever is rotatably mounted on the frame through a shaft lever seat, the support window is fixed with the shaft lever and rotates along with the shaft lever, and the support window is fixed on the wall body. The supporting window has a supported state and a closed state, the supporting window further comprises a special-shaped gear, the special-shaped gear is fixedly arranged at the end of the shaft rod, an annular containing groove is formed in the surface of the side, close to the wall body, of the shaft rod base, and the special-shaped gear rotates in the annular containing groove; and the mounting plate is vertically arranged in the wall body and corresponds to the position of the shaft rod seat, and a second vertical groove is formed in the mounting plate. The supporting bodies are arranged on the two sides of the branch window, the branch window can be supported by rotating the supporting bodies, the defect that a traditional supporting rod occupies the bottom space of the branch window is overcome, shielding cannot be formed at the bottom of the branch window, and a better visual field can be obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of antique buildings, in particular to an antique building lifting window. Background Art

[0002] The supporting window, also known as the Hehe window, is usually divided into two layers, the upper one is the supporting window, which can be rotated and opened, and then supported by a picking hook at the bottom of the supporting window; the lower one is the picking window, which is usually fixed by a wooden tenon and a mortise on the window frame. When needed, the wooden tenon can be removed and the window can be taken down.

[0003] In the patent with announcement number CN218150418U, an antique building window is proposed. By setting a connecting rod, a sliding groove and a sleeve rod, the two ends of the connecting rod are always connected to the window body and the window frame respectively. During the opening of the window, the connecting rod slides along the sliding groove, and there is no need to insert the support rod separately. The opening angle of the window can be adjusted by the sleeve rod, and the operation process is relatively simple.

[0004] Since the connecting rod is connected to the window, when the window is opened, the connecting rod is located below the window, obstructing the space at the bottom of the window, making it inconvenient to utilize the space at the bottom of the window, and blocking the field of vision. Utility Model Content

[0005] The utility model provides an antique building lifting window, which has the advantages of not forming any obstruction at the bottom of the window body and can obtain a better field of vision, so as to solve the problems in the background technology.

[0006] In order to achieve the purpose of not forming an obstruction at the bottom of the window and obtaining a better field of vision, the utility model provides the following technical solutions: an antique building support window, comprising a wall and a support window, wherein a frame is fixed on the surface of the wall, a shaft is rotatably installed on the frame through a shaft seat, the support window is fixed to the shaft and rotates with the shaft, and the support window has a propped-up state and a closed state, and further comprises: an incomplete gear, wherein the incomplete gear is fixedly arranged at the end of the shaft, an annular receiving groove is provided on the surface of the shaft seat close to the wall, and the incomplete gear rotates in the annular receiving groove; a mounting plate, wherein the mounting plate is vertically arranged in the wall and is connected to the shaft Corresponding to the position of the seat, a second vertical slot is provided in the mounting plate; a rack is slidably arranged in the second vertical slot, and the rack is meshed with the incomplete gear, and a driving column is fixed to the lower end of the rack; a rotating shaft is rotatably arranged below the shaft rod, and a support body is fixed on the side of the rotating shaft away from the wall, and an oblique groove is provided on the side of the rotating shaft close to the wall, and the driving column can slide in the oblique groove in the vertical direction to rotate the rotating shaft, so that the support body has a supporting position and an initial position; when the support window is in the propped-up state, the support body is in the supporting position, and when the support window is in the closed state, the support body is in the initial position.

[0007] As an optimal technical solution of the present invention, a fixed block is fixedly provided under the shaft, and the rotating shaft is rotatably installed on the fixed block; a clearance groove is opened on the side of the fixed block close to the wall, and the driving column can slide in the vertical direction in the clearance groove; when the support body is in the initial position, the clearance groove is connected to the inclined groove.

[0008] As a preferred technical solution of the present invention, the incomplete gear consists of a tooth portion and a smooth portion.

[0009] As a preferred technical solution of the present invention, the number of teeth of the incomplete gear is greater than the number of teeth of the rack; when the support window is in a closed state, the teeth at the lower end of the rack correspond to the smooth part; when the support window is in a propped-up state, the teeth at the upper end of the rack correspond to the toothed part.

[0010] As a preferred technical solution of the present invention, a lower contact block is slidably provided on the lower side of the second vertical groove, a telescopic rod is fixed between the lower contact block and the bottom end of the second vertical groove, and a support spring is sleeved on the outer circumference of the telescopic rod; the bottom surface of the rack contacts the upper surface of the lower contact block.

[0011] As a preferred technical solution of the present invention, a vertical portion is provided at the lower portion of the chute, and the vertical portion is provided on a side close to the inclination direction of the chute.

[0012] As a preferred technical solution of the present invention, a first vertical groove is provided on the mounting plate above the second vertical groove, an upper contact block is slidably provided in the first vertical groove, and a return spring is vertically provided between the upper surface of the upper contact block and the top of the first vertical groove; a connecting groove is provided between the second vertical groove and the first vertical groove, and the width of the connecting groove is smaller than the width of the second vertical groove and the first vertical groove; an insertion portion is fixed to the top of the rack, and the insertion portion can slide in the connecting groove, and when the insertion portion is located in the second vertical groove, it is subjected to the downward pressure of the upper contact block.

[0013] Compared with the prior art, the present invention provides an antique building detachable window, which has the following beneficial effects:

[0014] 1. The antique building support window sets support bodies on both sides of the support window. The support bodies can be rotated to support the support window, avoiding the disadvantage of traditional support rods occupying the bottom space of the support window, and will not form an obstruction at the bottom of the support window, so that a better field of view can be obtained.

[0015] 2. The antique building support window is equipped with an incomplete gear at the end of the shaft. When the window is opened, the incomplete gear can be driven to rotate, and the rack is driven to move by the incomplete gear, which in turn drives the rotating shaft and the support body to rotate, so that the window can be supported by the support body when it is opened to the required angle, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is an exploded view of the overall structure of the utility model;

[0018] Figure 3 This is a side sectional view of the utility model;

[0019] Figure 4 This is the matching diagram of the incomplete gear and the shaft rod seat of the utility model;

[0020] Figure 5 This is the matching diagram of the incomplete gear, rack and rotating shaft of the utility model;

[0021] Figure 6 This is a schematic diagram of the fixed block and rotating shaft structure of the utility model;

[0022] Figure 7 This is a schematic diagram of the positions of the incomplete gear and the rack in the closed state of the utility model;

[0023] Figure 8 This is a schematic diagram of the displacement of the incomplete gear and rack in the expanded state of the utility model;

[0024] Figure 9 This is a schematic diagram of the internal structure of the mounting plate of the utility model;

[0025] Figure 10 This is a cross-sectional view of the installation plate test of the utility model.

[0026] In the figure: 1. wall; 2. window support; 3. screed; 4. frame; 5. mounting plate; 51. first vertical groove; 52. second vertical groove; 53. connecting groove; 6. shaft seat; 61. annular receiving groove; 7. shaft; 8. incomplete gear; 81. tooth portion; 82. smooth portion; 9. rack; 91. driving column; 10. insertion portion; 11. upper contact block; 12. return spring; 13. lower contact block; 14. support spring; 15. telescopic rod; 16. fixing block; 17. clearance groove; 18. support body; 19. rotating shaft; 191. inclined groove; 192. vertical portion. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1 - Figure 6 The utility model discloses an antique building support window, including a wall 1 and a support window 2. In the prior art, a frame 4 is fixed on the surface of the wall 1, and a shaft 7 is rotatably installed on the frame 4 through a shaft seat 6, and the support window 2 is fixed to the shaft 7, so that the support window 2 can be pushed to rotate around the shaft 7. In order to protect the shaft 7, a wiper 3 is usually fixed on the shaft 7. The support window 2 has a propped up state and a closed state. The propped up state is the state in which the support window 2 is open. At this time, the support window 2 and the wall 1 have a certain angle, so that people in the house can get a view outside the house. The closed state is the state in which the support window 2 is parallel to the wall 1. Of course, the parallel here is not strictly mathematically parallel, but an approximate state. At this time, the support window 2 is stored in the frame 4.

[0029] The antique building support window also includes an incomplete gear 8, which is fixed to the end of the shaft 7, and an annular accommodating groove 61 is opened on the surface of the shaft seat 6 close to the wall 1. The annular accommodating groove 61 can provide an accommodating space, so that when the support window 2 is pushed to transmit, the incomplete gear 8 can be driven by the shaft 7 to rotate in the annular accommodating groove 61.

[0030] In addition, a mounting plate 5 is provided in the wall 1. The mounting plate 5 is vertically arranged at positions on both sides of the support window 2 and corresponds to the position of the shaft seat 6. The mounting plate 5 can be set by opening a groove that matches the mounting plate 5 on the wall 1 and fixed by an expansion screw. A second vertical groove 52 is also provided in the mounting plate 5. A rack 9 is slidingly provided in the second vertical groove 52, and the rack 9 is engaged with the incomplete gear 8. The incomplete gear 8 can drive the rack 9 to move up or down in the second vertical groove 52 by its own rotation. A driving column 91 is fixed at the lower end of the rack 9, and the driving column 91 moves synchronously with the rack 9.

[0031] In addition, a rotating shaft 19 is rotatably provided below the shaft 7, and a support body 18 is fixedly provided on the side of the rotating shaft 19 away from the wall 1. When the supporting window 2 is propped up, the support body 18 can be rotated to the side close to the supporting window 2, so that it is located below the supporting window 2, thereby supporting the supporting window 2 on the side of the supporting window 2. The support body 18 can be set as a decorative structure, so that it can have a decorative effect while playing a supporting role. An inclined groove 191 is provided on the side of the rotating shaft 19 close to the wall 1. When the driving column 91 slides down into the inclined groove 191 in the vertical direction, the driving column 91 can be rotated to the side close to the supporting window 2. When the support window 2 is in the bottom position, the rotating shaft 19 drives the support body 18 to rotate to the bottom of the support window 2, so that the support body 18 is in the supporting position. Afterwards, when the driving column 91 slides up in the inclined groove 191 in the vertical direction to disengage from the inclined groove 191, the rotating shaft 19 drives the support body 18 to rotate and leave the bottom of the support window 2, so that the support body 18 is in the initial position, so that the support window 2 is not limited by the support body 18 during the process of falling to the closed state. Therefore, when the support window 2 is in the propped up state, the support body 18 is in the supporting position, and when the support window 2 is in the closed state, the support body 18 is in the initial position.

[0032] In this embodiment, the incomplete gear 8, the support body 18 and the connecting components therebetween can be set in one group, or in two groups symmetrically about the supporting window 2. Setting up one group is suitable for the case where the supporting window 2 is lighter in weight, thereby reducing manufacturing costs, and setting up two groups is suitable for the case where the supporting window 2 is heavier in weight, thereby improving the load-bearing capacity and stability.

[0033] Combine Figure 5 and Figure 6 In order to facilitate the installation of the rotating shaft 19, a fixed block 16 is fixed below the shaft 7, and the rotating shaft 19 is rotatably installed on the fixed block 16. Optionally, two fixed blocks 16 can be symmetrically arranged about the rotating shaft 19. The rotating shaft 19 can be set as a stepped shaft, and the two sides close to the fixed block 16 are diameter-reduced ends. The two diameter-reduced ends are rotatably installed in the fixed block 16, thereby improving the stability of the installation of the rotating shaft 19.

[0034] In addition, a clearance groove 17 is formed on one side of the fixing block 16 close to the wall 1 , and the driving column 91 can slide vertically in the clearance groove 17 , thereby preventing the fixing block 16 from hindering the movement of the driving column 91 .

[0035] In addition, when the support body 18 is in the initial position, the clearance groove 17 is connected to the inclined groove 191, that is, the opening at the upper end of the inclined groove 191 corresponds to the opening at the lower end of the clearance groove 17, so that the driving column 91 can slide from the clearance groove 17 into the inclined groove 191.

[0036] refer to Figure 7 ,or Figure 8 Specifically, the incomplete gear 8 consists of a tooth portion 81 and a smooth portion 82 .

[0037] When the supporting window is in use, the incomplete gear 8 can be driven to rotate by pushing the supporting window 2, thereby driving the rack 9 to move, and then the rotating shaft 19 can be driven to rotate through the driving column 91, so that the support body 18 supports the position or the initial position. In fact, in the initial stage of pushing the supporting window 2 to be opened outward, if the supporting body 18 rotates toward the side close to the supporting window 2, it will collide with the side of the supporting window 2 and be limited by the side of the supporting window 2, causing it to be stuck.

[0038] Combine Figure 7 In order to avoid the above situation, the number of teeth of the incomplete gear 8 is set to be greater than the number of teeth of the rack 9, and when the branch window 2 is in the closed state, the teeth at the lower end of the rack 9 correspond to the smooth portion 82. The correspondence here means:

[0039] Connect a tooth on the side of the incomplete gear 8 closest to the rack 9 with the axis of the shaft 7, and then connect a tooth at the lower end of the rack 9 with the axis of the shaft 7. There is an angle between the two connecting lines. Optionally, the angle ranges from 10° to 20°, so that the incomplete gear 8 needs to rotate a certain angle before it can engage with the rack 9, that is, the support window 2 needs to be opened to a certain angle before it can drive the support body 18 to rotate toward the side close to the support window 2.

[0040] Correspondingly, if the branch window 2 is directly pulled inward to be closed, the branch window 2 will be limited by the support body 18, thereby restricting the movement of the branch window 2.

[0041] Combine Figure 8 In order to avoid the above situation, when the supporting window 2 is in the propped-up state, the uppermost tooth of the rack 9 corresponds to the tooth portion 81, and a rebound component is provided at the bottom end of the rack 9. When the supporting window 2 is to be closed, the supporting window 2 is first propped outward by a certain angle. During the outward propping-up process, the incomplete gear 8 first drives the rack 9 downward by a distance of one tooth. Then, since there is no tooth above the rack 9 engaged with the teeth of the incomplete gear 8, the rack 9 will move upward under the action of the rebound component until it is engaged with the incomplete gear 8, and this process is repeated, and then the supporting window 2 is closed inward. Since a certain distance is left between the lower surface of the supporting window 2 and the top end of the supporting body 18 at this time, the supporting window 2 can rotate freely, and at the same time, the supporting body 18 rotates to the side away from the supporting window 2 and completely disengages from the bottom of the supporting window 2.

[0042] Combine Figure 3 、 Figure 9 and Figure 10Specifically, the above-mentioned rebound assembly includes a lower contact block 13 slidably arranged on the lower side of the second vertical slot 52, and a telescopic rod 15 is fixed between the lower contact block 13 and the bottom end of the second vertical slot 52. The outer peripheral surface of the telescopic rod 15 is sleeved with a support spring 14. The bottom surface of the rack 9 is always in contact with the upper surface of the lower contact block 13, so that the lower contact block 13 always generates an upward thrust on the rack 9.

[0043] Combine Figure 6 In order to prevent the vertical displacement caused by repeated meshing of the top tooth of the rack 9 with the incomplete gear 8 from driving the rotating shaft 19 to rotate, a vertical portion 192 is provided at the lower part of the inclined groove 191. The vertical portion 192 is provided on the side close to the inclination direction of the inclined groove 191, so that the driving column 91 moves up and down repeatedly in the vertical portion 192 without generating driving force on the rotating shaft 19.

[0044] Combine Figure 3 and Figure 9 In order to ensure that the rack 9 is in the initial state when the branch window 2 is in the closed state after one movement, a first vertical groove 51 is opened on the mounting plate 5 above the second vertical groove 52, and an upper contact block 11 is slidably provided in the first vertical groove 51. A return spring 12 is vertically provided between the upper surface of the upper contact block 11 and the top of the first vertical groove 51. The return spring 12 always applies downward pressure to the upper contact block 11.

[0045] Furthermore, a connecting groove 53 is provided between the second vertical groove 52 and the first vertical groove 51 . The width of the connecting groove 53 is smaller than that of the second vertical groove 52 and the first vertical groove 51 , so that the upper contact block 11 can be stuck in the first vertical groove 51 without falling out.

[0046] In addition, an insertion portion 10 is fixed at the top of the rack 9. The width of the insertion portion 10 is smaller than that of the rack 9, so that the insertion portion 10 can slide in the connecting groove 53. When the insertion portion 10 is located in the second vertical groove 52, it is subjected to the downward pressure of the upper contact block 11. In the process of closing the branch window 2, when the upper surface of the insertion portion 10 on the rack 9 moves to contact the upper contact block 11, if the rack 9 and the incomplete gear 8 are still in a meshing state, that is, the rack 9 has moved to the uppermost end when the branch window 2 is fully closed, the branch window 2 can be further rotated to close the branch window 2 so that the insertion portion 10 presses the upper contact block 11 upward. After a tooth at the lower end of the rack 9 is disengaged from the incomplete gear 8, it will move downward under the pressure of the upper contact block 11 to mesh with the next tooth of the incomplete gear 8, and repeat this process until the smooth portion 82 of the incomplete gear 8 corresponds to the rack 9, that is, the branch window 2 is fully closed and in a closed state. At this time, the rack 9 remains stationary under the support of the lower contact block 13, so as to facilitate the next opening of the branch window 2.

[0047] When in use, the window 2 is pushed outward, and the shaft 7 fixed to the window 2 will rotate accordingly and drive the incomplete gear 8 to rotate. When the incomplete gear 8 rotates a certain angle until the tooth portion 81 engages with the rack 9, the rack 9 will move downward as the window 2 rotates, and drive the rotating shaft 19 to rotate through the driving column 91, and then drive the support body 18 to rotate. When the window 2 is pushed open to the desired angle, you can let go. At this time, the support body 18 rotates to the bottom of the window 2 and supports the window 2.

[0048] When the window 2 needs to be closed, the window 2 is first opened outward to a certain angle, and then the window 2 is rotated in the closing direction. The incomplete gear 8 rotates in the opposite direction and drives the rack 9 to move upward. At this time, the driving column 91 drives the rotating shaft 19 to rotate in the opposite direction, thereby resetting the support body 18. When the window 2 is fully closed, the rack 9 moves to the initial position.

[0049] The working principle and usage process of the present invention are as follows: when in use, the branch window 2 is pushed outward, and the shaft 7 fixed to the branch window 2 will rotate accordingly and drive the incomplete gear 8 to rotate. When the incomplete gear 8 rotates through a certain angle until the tooth portion 81 engages with the rack 9, the rack 9 will move downward as the branch window 2 rotates, and drives the rotating shaft 19 to rotate through the driving column 91, and then drives the support body 18 to rotate. When the branch window 2 is pushed open to the desired angle, you can let go. At this time, the support body 18 rotates to the bottom of the branch window 2 and supports the branch window 2.

[0050] When the window 2 needs to be closed, the window 2 is first opened outward to a certain angle, and then the window 2 is rotated in the closing direction. The incomplete gear 8 rotates in the opposite direction and drives the rack 9 to move upward. At this time, the driving column 91 drives the rotating shaft 19 to rotate in the opposite direction, thereby resetting the support body 18. When the window 2 is fully closed, the rack 9 moves to the initial position.

[0051] To sum up, the antique building supporting window, by arranging support bodies 18 on both sides of the supporting window 2, can support the supporting window 2 by rotating the support bodies 18, avoiding the disadvantage of traditional support rods occupying the bottom space of the supporting window 2, and no obstruction is formed at the bottom of the supporting window 2, so that a better field of vision can be obtained; by arranging an incomplete gear 8 at the end of the shaft 7, the incomplete gear 8 can be driven to rotate while the supporting window 2 is opened, and the rack 9 is driven to move by the incomplete gear 8, and then the rotating shaft 19 and the support body 18 are driven to rotate, so that the supporting window 2 can be supported by the support body 18 while being opened to the desired angle, which is convenient to use.

[0052] It should be noted that, in this document, terms such as "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0053] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A window frame of an antique building, comprising a wall (1) and a window frame (2), wherein a frame (4) is fixed to the surface of the wall (1), a shaft (7) is rotatably mounted on the frame (4) via a shaft seat (6), the window frame (2) is fixed to the shaft (7) and rotates with the shaft (7), the window frame (2) has an open state and a closed state, and is characterized in that: Also includes: An incomplete gear (8), wherein the incomplete gear (8) is fixed to the end of the shaft (7), and an annular receiving groove (61) is provided on the surface of the shaft base (6) close to the wall (1), and the incomplete gear (8) rotates in the annular receiving groove (61); A mounting plate (5), the mounting plate (5) being vertically arranged in the wall (1) and corresponding to the position of the shaft seat (6), and a second vertical slot (52) being provided in the mounting plate (5); A rack (9), wherein the rack (9) is slidably disposed in the second vertical groove (52), and the rack (9) is engaged with the incomplete gear (8), and a driving column (91) is fixedly disposed at the lower end of the rack (9); A rotating shaft (19), the rotating shaft (19) is rotatably arranged below the shaft (7), a support body (18) is fixedly provided on a side of the rotating shaft (19) away from the wall (1), an inclined groove (191) is provided on a side of the rotating shaft (19) close to the wall (1), and the driving column (91) can slide in the inclined groove (191) in a vertical direction to rotate the rotating shaft (19), thereby allowing the support body (18) to have a supporting position and an initial position; When the support window (2) is in an open state, the support body (18) is in a supporting position; when the support window (2) is in a closed state, the support body (18) is in an initial position.

2. The antique building detachable window according to claim 1, characterized in that: A fixed block (16) is fixedly provided below the shaft (7), and the rotating shaft (19) is rotatably mounted on the fixed block (16); A clearance groove (17) is provided on one side of the fixing block (16) close to the wall (1), and the driving column (91) can slide in the vertical direction in the clearance groove (17); When the support body (18) is in the initial position, the clearance groove (17) is connected to the inclined groove (191).

3. The antique building detachable window according to claim 1, characterized in that: The incomplete gear (8) consists of a tooth portion (81) and a smooth portion (82).

4. The antique building detachable window according to claim 3, characterized in that: The number of teeth of the incomplete gear (8) is greater than the number of teeth of the rack (9); When the support window (2) is in a closed state, the teeth at the lower end of the rack (9) correspond to the smooth portion (82); When the support window (2) is in the propped-up state, the uppermost tooth of the rack (9) corresponds to the tooth portion (81).

5. The antique building detachable window according to claim 1, characterized in that: A lower contact block (13) is slidably provided on the lower side of the second vertical slot (52), a telescopic rod (15) is fixed between the lower contact block (13) and the bottom end of the second vertical slot (52), and a support spring (14) is sleeved on the outer circumference of the telescopic rod (15); The bottom surface of the rack (9) contacts the upper surface of the lower contact block (13).

6. The antique building detachable window according to claim 1, characterized in that: A vertical portion (192) is provided at the lower portion of the inclined slot (191), and the vertical portion (192) is provided on a side close to the inclined direction of the inclined slot (191).

7. The antique building detachable window according to claim 1, characterized in that: A first vertical slot (51) is provided on the mounting plate (5) above the second vertical slot (52), an upper contact block (11) is slidably provided in the first vertical slot (51), and a return spring (12) is vertically provided between the upper surface of the upper contact block (11) and the top of the first vertical slot (51); A connecting groove (53) is provided between the second vertical groove (52) and the first vertical groove (51), and the width of the connecting groove (53) is smaller than the widths of the second vertical groove (52) and the first vertical groove (51); An insertion portion (10) is fixedly provided at the top end of the rack (9), and the insertion portion (10) is capable of sliding in the connecting groove (53). When the insertion portion (10) is located in the second vertical groove (52), it is subjected to downward pressure from the upper contact block (11).

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