CN220397133U - Mounting device for monitoring camera, monitoring camera and monitoring camera device - Google Patents

Abstract

The utility model discloses a mounting device for a monitoring camera, the monitoring camera and the monitoring camera device, which belong to the technical field of monitoring cameras and comprise a support A, a rotating frame, an adjusting frame, a sliding groove B, a sliding groove C, a support B and the monitoring camera, wherein the rotating frame is arranged below the support A, the adjusting frame is arranged below the rotating frame, the sliding groove B and the sliding groove C are respectively embedded in the upper part and the lower part of the adjusting frame, and the lower part of the rotating frame is arranged on the inner side of the sliding groove B in a sliding way through a sliding block. When the monitoring camera is opened by a worker for long-term use and needs to be maintained regularly, the limiting frame is pushed to slide upwards on the inner side of the sliding groove D, so that after the arc-shaped concave surface below the limiting frame is moved away from the surface of the limiting rod, the monitoring camera is pushed to drive the mounting groove to slide out of the outer side of the limiting rod, the mounting groove is detached, and after the monitoring camera is maintained by the worker, the quick mounting treatment is performed in the same manner, so that the effect of the monitoring camera is convenient for the worker to detach and mount.

Description

Mounting device for monitoring camera, monitoring camera and monitoring camera device

Technical Field

The utility model belongs to the technical field of monitoring cameras, and particularly relates to a mounting device for a monitoring camera, the monitoring camera and a monitoring camera device.

Background

The monitoring camera is a monitoring device capable of converting a photographed picture into a digital signal and transmitting the digital signal to a designated display screen to display a monitoring picture, and is often used as a quasi-camera in security and protection, so that a monitoring camera is required.

According to the search, the application number is CN202021760375.5, the monitoring camera mounting structure is provided with a driving gear which is driven by a motor to rotate and meshed with a driven gear, so that a driving rod and a camera body are driven to rotate, when a camera part is required to be shielded, a second motor is started, the second motor drives the rotating gear to rotate and meshed with a rack, so that the shielding cover moves in the horizontal direction, the shielding cover moves horizontally, a pulley moves on a sliding rail, the movement of the shielding cover is more stable, and the sliding block is in sliding connection with the sliding groove; the disadvantages are as follows:

when the staff uses this kind of surveillance camera machine mounting structure to install the surveillance camera machine and carry out the monitor processing in the assigned position, the motor drives the driving gear and rotates, with driven gear meshing, thereby drive the rotation of actuating lever and camera body, when needs shelter from camera position, the second motor drives the rotation gear and rotates and mesh with the rack, thereby make the cover that shelters from and do the removal on the horizontal direction, and drive the surveillance camera machine and carry out the change of angle, and the surveillance camera machine is when carrying out the angle change, because only carry out the angle change in fixed position, the surveillance camera machine itself can not be fine carry out the monitor processing at dead angle in a large scale owing to the removal of position.

Disclosure of Invention

The utility model aims at: in order to solve the problem that the position adjusting effect of the monitoring camera is relatively poor in the monitoring camera mounting structure, a mounting device for the monitoring camera, the monitoring camera and a monitoring camera device are provided.

The technical scheme adopted by the utility model is as follows: a installation device, surveillance camera machine and surveillance camera machine for surveillance camera machine, including support frame A, rotating turret, alignment jig, spout B, spout C, support frame B and surveillance camera machine, support frame A below is provided with the rotating turret, the rotating turret below is provided with the alignment jig, the embedding is provided with spout B and spout C respectively in the upper and lower side of alignment jig, and the rotating turret below passes through the slider slip setting inboard at spout B, the alignment jig below is provided with support frame B through the slider slip, the support frame B below is provided with the surveillance camera machine, the alignment jig outside is provided with the slide position adjustment mechanism that can freely adjust the position increase surveillance camera machine monitoring range of surveillance camera machine, the support frame B below is provided with the slip stop gear who makes things convenient for the staff to dismantle and install the surveillance camera machine.

The sliding limiting mechanism is composed of a sliding groove D, a limiting frame, a damping telescopic rod B, a limiting rod and a mounting groove, the sliding groove D is embedded in the lower portion of the supporting frame B, the limiting frame is arranged on the inner side of the sliding groove D in a sliding mode, the limiting rod is fixedly mounted below the limiting frame in a mode that the side of the supporting frame B is close to the lower portion of the limiting frame, the lower portion of the limiting frame is arc-shaped, arc-shaped concave faces below the limiting frame are in fit contact with the upper portion of the limiting rod, the damping telescopic rod B is fixedly mounted between the lower portion of the limiting frame and the lower portion of the inner wall of the sliding groove D, a spring is arranged on the outer side of the damping telescopic rod B in a matched mode, the mounting groove is embedded in the side portion of the monitoring camera, and the mounting groove is in fit for sliding and is arranged on the outer side of the limiting rod.

Wherein the sliding position adjusting mechanism consists of a chute A, an electric roller B, a damping telescopic rod A, a limiting block A, a limiting groove B, an electric roller C, a damping telescopic rod C and a limiting block B, wherein the chute A is embedded in the side of the support frame A and is in an annular shape, the electric roller A is rotatably arranged on the two sides above the rotating frame through bearings and is in fit sliding arrangement on the inner side of the chute A, the electric roller B is in fit sliding arrangement on the inner side of the chute B through bearings and is arranged on the two sides below the rotating frame in a front-back relative rotation manner, the limiting grooves A are embedded in the upper part of the inner wall of the chute B and are in a plurality of arc-shaped equidistant parallel arrangement, the damping telescopic rods A are fixedly arranged on the two sides below the rotating frame and are close to the electric roller B, the damping telescopic rod A is provided with springs in a matched mode, a limiting block A is fixedly arranged above the end part of the damping telescopic rod A, the upper part of the limiting block A is in an arc-shaped mode, the limiting block A is matched with and slides to be arranged on the inner side of a limiting groove A, electric rollers C are arranged on the two sides of the upper part of a supporting frame B in a matched mode through front-back relative rotation of bearings, the electric rollers C are matched with and slide to be arranged on the inner side of a sliding groove C, limiting grooves B are embedded in the lower portion of the inner wall of the sliding groove C, a plurality of limiting grooves B are formed in an arc-shaped equidistant parallel mode, damping telescopic rods C are fixedly arranged on the two sides of the upper part of the supporting frame B close to the electric rollers C, springs are arranged on the outer side of the damping telescopic rods C in a matched mode, a limiting block B is fixedly arranged below the end part of the damping telescopic rods C, the lower part of the damping telescopic rods C is in an arc-shaped mode, and the limiting block B is matched with the inner side of the limiting groove B in a sliding manner.

In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:

1. this kind of a mounting device for surveillance camera, surveillance camera and surveillance camera device are through being provided with sliding stop gear, can make the staff pass through spout D, spacing groove C, damping telescopic link B, cooperation between gag lever post and the mounting groove, utilize damping telescopic link B and outside spring drive spacing can freely stretch out or shrink, make the spacing can carry out quick limit with surveillance camera, make things convenient for the staff to dismantle the effect of installing surveillance camera.

2. This kind of a mounting means for surveillance camera, surveillance camera and surveillance camera device are through being provided with sliding position adjustment mechanism, can make the staff pass through spout A, electronic gyro wheel B, damping telescopic link A, stopper A, spacing groove B, cooperation between electronic gyro wheel C, damping telescopic link C and the stopper B, utilize electronic gyro wheel A to slide in spout A inboard, drive behind the slip direction that the alignment jig changed surveillance camera, utilize electronic gyro wheel B and electronic gyro wheel C respectively in spout B and spout C inboard, drive alignment jig and surveillance camera and carry out the change in position, make things convenient for the staff to freely adjust surveillance camera to suitable surveillance position and carry out the monitoring at no dead angle.

Drawings

FIG. 1 is a schematic diagram of a front perspective view of a surveillance camera according to the present utility model;

FIG. 2 is a schematic diagram of a front cross-sectional structure of a monitoring camera according to the present utility model;

FIG. 3 is a schematic diagram of the enlarged construction of FIG. 2 at A in accordance with the present utility model;

fig. 4 is a schematic diagram showing a second enlarged structure of the embodiment B in fig. 2 according to the present utility model.

The marks in the figure: 1. a supporting frame A; 101. a chute A; 2. a rotating frame; 201. an electric roller A; 202. an electric roller B; 203. damping telescopic rod A; 204. a limiting block A; 3. an adjusting frame; 301. a chute B; 302. a limit groove A; 303. a chute C; 304. a limit groove B; 4. a support B; 401. an electric roller C; 402. a chute D; 403. a limiting frame; 405. damping telescopic rod B; 406. a limit rod; 407. damping telescopic rod C; 408. a limiting block B; 5. a monitoring camera; 501. a mounting groove; 502. a limiting block C; 503. a limit bump; 6. a limit groove D; 601. and a limit groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the utility model, the following components are added:

embodiment one: referring to fig. 1 to 4, a mounting device for a surveillance camera, the surveillance camera and the surveillance camera device, including support frame A1, rotating frame 2, alignment jig 3, spout B301, spout C303, support frame B4 and surveillance camera 5, support frame A1 below is provided with rotating frame 2, rotating frame 2 below is provided with alignment jig 3, the embedding respectively is provided with spout B301 and spout C303 in alignment jig 3 upper and lower, and rotating frame 2 below is provided with inside spout B301 through the slider slip, alignment jig 3 below is provided with support frame B4 through the slider slip, support frame B4 below is provided with surveillance camera 5, the alignment jig 3 outside is provided with the slide position adjustment mechanism that can freely adjust the position increase surveillance camera monitoring range of surveillance camera, support frame B4 below is provided with the slip stop gear that makes things convenient for the staff to dismantle and install the surveillance camera.

Referring to fig. 1-3, further, the sliding limiting mechanism is composed of a chute D402, a limiting frame 403, a damping telescopic rod B405, a limiting rod 406 and a mounting groove 501;

a chute D402 is embedded below the supporting frame B4, a limit frame 403 is arranged on the inner side of the chute D402 in a sliding manner, a limit rod 406 is fixedly arranged below the lateral side of the supporting frame B4 close to the limit frame 403, the lower side of the limit frame 403 is arranged in an arc shape, an arc concave surface below the limit frame 403 is in fit contact with and is arranged above the limit rod 406, a damping telescopic rod B405 is fixedly arranged between the lower side of the limit frame 403 and the lower side of the inner wall of the chute D402, a spring is arranged on the outer side of the damping telescopic rod B405 in a matched manner, a mounting groove 501 is embedded on the lateral side of the monitoring camera 5, the mounting groove 501 is in fit sliding manner and is arranged on the outer side of the limit rod 406, when a worker needs to mount the monitoring camera 5 to a designated position for monitoring use, the monitoring camera 5 is carried to a mounting site, the limit frame 403 is pushed to slide upwards on the inner side of the chute D402, after the arc concave surface below the limiting frame 403 moves away from the surface of the limiting rod 406 and drives the damping telescopic rod B405 and the outer spring to be unfolded, a worker slides the side mounting groove 501 of the monitoring camera 5 out of the limiting rod 406 and releases the limiting frame 403, so that the damping telescopic rod B405 and the outer spring contract the limiting frame 403, the arc concave surface below the limiting frame 403 contacts the surface of the limiting rod 406, the monitoring camera 5 completes the limiting mounting treatment, and when the monitoring camera 5 is opened by the worker for a long time for use and needs to be maintained regularly, the worker pushes the pushing limiting frame 403 to slide upwards inside the sliding groove D402, so that after the arc concave surface below the limiting frame 403 moves away from the surface of the limiting rod 406, the monitoring camera 5 is pushed to drive the mounting groove 501 to slide out of the limiting rod 406, the dismounting is completed, and after the monitoring camera 5 is maintained by the worker, the quick mounting treatment is performed in the same manner, the effect of convenient staff dismantles and installs surveillance camera 5.

Referring to fig. 1 to 3, further, the sliding position adjusting mechanism is composed of a sliding chute a101, an electric roller a201, an electric roller B202, a damping telescopic rod a203, a limiting block a204, a limiting groove a302, a limiting groove B304, an electric roller C401, a damping telescopic rod C407 and a limiting block B408;

the side of the supporting frame A1 is embedded with a chute A101, the chute A101 is in an annular shape, two sides above the rotating frame 2 are rotatably provided with an electric roller A201 through bearings, the electric roller A201 is engaged and slidingly arranged at the inner side of the chute A101, two sides below the rotating frame 2 are oppositely rotated through bearings to be provided with an electric roller B202, the electric roller B202 is engaged and slidingly arranged at the inner side of the chute B301, a limit groove A302 is embedded above the inner wall of the chute B301, a plurality of limit grooves A302 are arranged in an arc-shaped equidistant parallel arrangement, two sides below the rotating frame 2 are fixedly provided with damping telescopic rods A203 close to the electric roller B202, springs are matched at the outer sides of the damping telescopic rods A203, a limit block A204 is fixedly arranged above the end part of the damping telescopic rods A203, the upper side of the limit block A204 is in an arc shape, the limit block A204 is engaged and slidingly arranged at the inner side of the limit groove A302, the two sides above the support frame B4 are provided with an electric roller C401 through the relative rotation of the bearing back and forth, the electric roller C401 is in fit sliding arrangement at the inner side of the chute C303, a limit groove B304 is embedded below the inner wall of the chute C303, a plurality of limit grooves B304 are arranged in parallel at equal intervals in an arc shape, a damping telescopic rod C407 is fixedly arranged at the two sides above the support frame B4 close to the electric roller C401, a spring is arranged outside the damping telescopic rod C407 in a matched manner, a limit block B408 is fixedly arranged below the end part of the damping telescopic rod C407, the lower part of the limit block B408 is in an arc shape, the limit block B408 is in fit sliding arrangement at the inner side of the limit groove B304, when a worker installs the monitoring camera 5, the monitoring camera 5 is opened for use, and when the monitoring camera 5 needs to be adjusted to a proper position for large-scale monitoring treatment, a servo motor matched with the electric roller A201 is opened to drive the electric roller A201 to rotate at the inner side of the chute A101, after driving the adjusting frame 3 below the rotating frame 2 to rotate to a proper direction, a worker opens a servo motor matched with the electric roller B202 and the electric roller C401 at the same time to drive the electric roller B202 and the electric roller C401 to move inside the sliding groove B301 and the sliding groove C303 respectively, and drive the limiting block A204 and the limiting block B408 to slide out from the limiting groove A302 and the limiting groove B304, and squeeze the corresponding damping telescopic rod A203 and the corresponding outer spring to contract with the damping telescopic rod C407 and the outer spring, so that after the adjusting frame 3 and the supporting frame B4 are adjusted to a proper position, the damping telescopic rod A203 and the outer spring slide out the limiting block A204 into the inner side of one of the opposite limiting grooves A302, the damping telescopic rod C407 and the outer spring pop out the limiting block B408 into the inner side of the other of the opposite limiting groove B304, and after limiting treatment on the adjusting frame 3 and the supporting frame B4 is completed, the monitoring camera 5 is adjusted to a proper position, and the monitoring treatment without dead angle is conveniently and freely carried out on the monitoring camera 5 by the worker.

Referring to fig. 2 and 3, further, the electric roller a201, the electric roller B202 and the electric roller C401 are electrically connected with the storage battery through the matched servo motor and control panel, and the monitoring camera 5 is electrically connected with the storage battery through the control panel.

Example two

As shown in fig. 4, a chute D402 is embedded under a supporting frame B4, a limit frame 403 is slidably disposed inside the chute D402, a limit bar 406 is fixedly disposed under the side of the supporting frame B4 near the lower side of the limit frame 403, the lower side of the limit frame 403 is arc-shaped, an arc-shaped concave surface under the limit frame 403 is fit and contact with and disposed above the limit bar 406, a damping telescopic rod B405 is fixedly disposed between the lower side of the limit frame 403 and the lower side of the inner wall of the chute D402, a spring is disposed outside the damping telescopic rod B405, a mounting groove 501 is embedded beside the monitoring camera 5, a limit groove 501 is fit and slide disposed outside the limit bar 406, another embodiment is provided, two sides under the supporting frame B4 are embedded with a limit groove D6, two sides above the monitoring camera 5 are fixedly disposed with a limit block C502, the limit block C502 is U-shaped, the limit block C502 is arranged on the inner side of the limit groove D6 in a fit sliding way, limit lugs 503 are fixedly arranged on two sides of the limit block C502, the limit lugs 503 are arranged in an arc shape, limit grooves 601 are embedded on two sides of the inner wall of the limit groove D6, the limit lugs 503 are arranged on the inner side of the limit grooves 601 in a fit sliding way, when a worker needs to install the monitor camera 5, the monitor camera 5 is arranged below the support frame B4, the monitor camera 5 is pushed to drive the limit block C502 and the limit lugs 503 to slide into the limit groove D6, the limit block C502 is extruded to deform, the limit lugs 503 are made to approach the limit grooves 601, the limit block C502 drives the limit lugs 503 to rebound, the limit lugs 503 slide into the inner sides of the limit grooves 601, the installation of the monitor camera 5 is completed, and when the worker needs to detach, the monitor camera 5 is pulled to drive the limit lugs 503 to slide out of the limit grooves 601, and extrusion stopper C502 produces the deformation after, makes stopper C502 and spacing lug 503 roll-off spacing groove D6, and after stopper C502 kick-backs, accomplish the dismantlement of surveillance camera machine 5, compare in first embodiment, it will be more convenient to dismantle the installation, and fixed effect is better.

Working principle: firstly, when a worker needs to install the monitoring camera 5 to a designated position for monitoring use, the worker carries the monitoring camera 5 to an installation site and pushes the limiting frame 403 to slide upwards on the inner side of the chute D402, so that the arc-shaped concave surface below the limiting frame 403 moves away from the surface of the limiting rod 406 and drives the damping telescopic rod B405 and the outer spring to be unfolded, and after the worker slides the side mounting groove 501 of the monitoring camera 5 to the outer side of the limiting rod 406 and releases the limiting frame 403, so that the damping telescopic rod B405 and the outer spring shrink the limiting frame 403, the arc-shaped concave surface below the limiting frame 403 contacts the surface of the limiting rod 406, the monitoring camera 5 is subjected to limiting installation treatment, then, when the worker opens the monitoring camera 5 to use and needs to adjust the monitoring camera 5 to a proper position for large-scale monitoring treatment, the servo motor matched with the electric roller A201 is opened to drive the electric roller A201 to rotate on the inner side of the chute A101, after driving the adjusting frame 3 below the rotating frame 2 to rotate to a proper direction, a worker opens a servo motor matched with the electric roller B202 and the electric roller C401 at the same time to drive the electric roller B202 and the electric roller C401 to move inside the sliding groove B301 and the sliding groove C303 respectively, and drive the limiting block A204 and the limiting block B408 to slide out from the limiting groove A302 and the limiting groove B304, and squeeze the corresponding damping telescopic rod A203 and the corresponding outer spring to contract with the damping telescopic rod C407 and the outer spring, so that after the adjusting frame 3 and the supporting frame B4 are adjusted to proper positions, the damping telescopic rod A203 and the outer spring slide the pop-up limiting block A204 into the inner side of one of the opposite limiting grooves A302, the damping telescopic rod C407 and the outer spring pop-up limiting block B408 slide into the inner side of one of the opposite limiting grooves B304, and after limiting treatment of the adjusting frame 3 and the supporting frame B4 is finished, the monitoring camera 5 is adjusted to a proper position, a worker can conveniently and freely adjust the monitoring camera 5 to a proper monitoring position to perform dead-angle-free monitoring treatment, finally, the monitoring camera 5 is used for a long time, when periodic maintenance is needed, the worker pushes the pushing limiting frame 403 to slide upwards on the inner side of the sliding groove D402, after the arc concave surface below the limiting frame 403 is moved away from the surface of the limiting rod 406, the monitoring camera 5 is pushed to drive the mounting groove 501 to slide out of the outer side of the limiting rod 406, the disassembly is completed, and after the monitoring camera 5 is maintained by the worker, the monitoring camera 5 is quickly mounted in the same manner.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (6)

1. A installation device, surveillance camera machine and surveillance camera machine for surveillance camera machine, including support frame A (1), rotating turret (2), alignment jig (3), spout B (301), spout C (303), support frame B (4) and surveillance camera machine (5), support frame A (1) below is provided with rotating turret (2), rotating turret (2) below is provided with alignment jig (3), embedding respectively is provided with spout B (301) and spout C (303) above and below alignment jig (3), and rotating turret (2) below sets up inboard in spout B (301) through the slider slip, alignment jig (3) below is provided with support frame B (4) through the slider slip, support frame B (4) below is provided with surveillance camera machine (5), its characterized in that: the sliding position adjusting mechanism capable of freely adjusting the position of the monitoring camera to enlarge the monitoring range of the monitoring camera is arranged on the outer side of the adjusting frame (3), and the sliding limiting mechanism which is convenient for workers to detach and install the monitoring camera is arranged below the supporting frame B (4).

2. The mounting apparatus for a monitoring camera, the monitoring camera, and the monitoring camera apparatus according to claim 1, wherein: the sliding limiting mechanism consists of a sliding chute D (402), a limiting frame (403), a damping telescopic rod B (405), a limiting rod (406) and a mounting groove (501);

the intelligent monitoring device is characterized in that a chute D (402) is embedded in the lower portion of the supporting frame B (4), a limiting frame (403) is slidably arranged on the inner side of the chute D (402), a limiting rod (406) is fixedly arranged below the lateral portion of the supporting frame B (4) close to the limiting frame (403), arc-shaped concave surfaces below the limiting frame (403) are in fit contact with and are arranged above the limiting rod (406), a damping telescopic rod B (405) is fixedly arranged between the lower portion of the limiting frame (403) and the lower portion of the inner wall of the chute D (402), a spring is arranged on the outer side of the damping telescopic rod B (405) in a matched mode, a mounting groove (501) is formed in the lateral portion of the monitoring camera (5) in an embedded mode, and the mounting groove (501) is arranged on the outer side of the limiting rod (406) in a fit sliding mode.

3. The mounting apparatus for a monitoring camera, the monitoring camera, and the monitoring camera apparatus according to claim 1, wherein: the sliding position adjusting mechanism consists of a sliding chute A (101), an electric roller A (201), an electric roller B (202), a damping telescopic rod A (203), a limiting block A (204), a limiting groove A (302), a limiting groove B (304), an electric roller C (401), a damping telescopic rod C (407) and a limiting block B (408);

the electric roller A (201) is rotatably arranged on two sides above the rotating frame (2) through bearings, the electric roller A (201) is slidably arranged on the inner side of the sliding groove A (101), the electric roller B (202) is rotatably arranged on two sides below the rotating frame (2) through bearings, the electric roller B (202) is slidably arranged on the inner side of the sliding groove B (301), a limit groove A (302) is embedded above the inner wall of the sliding groove B (301), a damping telescopic rod A (203) is fixedly arranged on two sides below the rotating frame (2) close to the electric roller B (202), a spring is arranged outside the damping telescopic rod A (203), a limit block A (204) is fixedly arranged above the end part of the damping telescopic rod A (203), the limit block A (204) is slidably arranged on the inner side of the limit groove A (302), an electric roller C (401) is rotatably arranged on two sides above the supporting frame B (4) through bearings, an electric roller C (401) is fixedly arranged on two sides of the electric roller C (401) close to the inner side of the sliding groove B (303), the electric roller C (401) is fixedly arranged on two sides of the supporting frame (303), and the outside of damping telescopic link C (407) is provided with the spring in a matched way, stopper B (408) is fixedly installed below the end part of damping telescopic link C (407), and stopper B (408) is fit and slide to be arranged on the inner side of limiting groove B (304).

4. The mounting apparatus for a monitoring camera, the monitoring camera, and the monitoring camera apparatus according to claim 2, wherein: the lower part of the limiting frame (403) is arranged in an arc shape.

5. The mounting device for a monitoring camera, the monitoring camera, and the monitoring camera device according to claim 3, wherein: the sliding chute A (101) is arranged in an annular shape, a plurality of limiting grooves A (302) are arranged in an arc-shaped equidistant parallel manner, and the upper part of the limiting block A (204) is arranged in an arc-shaped manner.

6. The mounting device for a monitoring camera, the monitoring camera, and the monitoring camera device according to claim 3, wherein: the limiting grooves B (304) are arranged in a plurality of arc-shaped equidistant parallel manner, and the lower parts of the limiting blocks B (408) are arranged in an arc-shaped manner.