CN220340868U - Information display device for rotary display - Google Patents

Abstract

The utility model provides an information display device for rotary display, which comprises: the display card rack comprises a support frame, wherein a display card hanging cylinder is rotationally connected to the support frame, a plurality of display cards are hung on the display card hanging cylinder, and the display card hanging cylinder is driven to rotate by a driving device. The support frame is including placing the base, is equipped with two at least supporting seats on placing the base, and the supporting seat top is equipped with the connecting seat, and the connecting seat is equipped with restriction show tablet pivoted show tablet shelves pole in show tablet hanging cylinder top. The show tablet hanging cylinder includes: and the central rotating shaft is rotationally connected with the supporting seat. The center rotating shafts are respectively and symmetrically provided with display board hanging plates along the section direction at the positions close to the two sides of the supporting seat. The two display board hanging plates are provided with a plurality of mounting holes along the plate surface in a surrounding manner at the same position. The utility model is light and convenient, and can display the complex information with a large-scale adjustable quantity according to the requirement. And the method can be used for outdoor advertisement display and desktop information display, and has a wide application range.

Description

Information display device for rotary display

Technical Field

The utility model relates to the technical field of automatic production, in particular to an information display device for rotary display.

Background

An information display device is a tool for displaying information, and a common information display device includes: billboards, water cards, roll-up stickers and the like. Most of the existing information display devices can only display single-page information, and when multi-page information is displayed, each page of information needs to be displayed by one display device, and the display device occupies a very large space.

The prior art also has a rotary display device, such as a water plate which can rotate 180 degrees on two sides, a roller set system is driven, and a rolling advertising plate which can circularly display a plurality of advertisements on a long color belt and the like can be provided. But existing rotary display devices exist: 1. the two-sided rotating water plate can only display the information of the front side and the back side, and cannot meet the requirement of multi-information display. 2. The rolling billboard is a large outdoor advertising display device, because the equipment is heavy and the color ribbon is complex to detach and replace, the advertising content can not be replaced frequently (the advertising signing time is long), the rolling billboard is generally installed at a fixed position, is difficult to be used for displaying desktop information such as water cards, easy-to-draw treasures, nameplates and menus, is limited by the length of the color ribbon, and can only display 2-4 advertising information generally.

Disclosure of Invention

In order to solve the above-mentioned problems in the background art, the present utility model provides an information display device for rotary display, including: the display card rack comprises a support frame, wherein a display card hanging cylinder is rotationally connected to the support frame, a plurality of display cards are hung on the display card hanging cylinder, and the display card hanging cylinder is driven to rotate by a driving device.

The support frame is including placing the base, be equipped with two at least supporting seats on placing the base, rotate between two adjacent supporting seats and install a show tablet hanging tube. The top of the supporting seat which is rotatably provided with the display card hanging cylinder is provided with a connecting seat, and the connecting seat is provided with a display card stop rod which limits the rotation of the display card above the display card hanging cylinder.

The display card hanging barrel comprises: and the central rotating shaft is rotationally connected with the supporting seat. The center rotating shafts are respectively and symmetrically provided with display board hanging plates at positions close to two sides of the supporting seat along the section direction. The two display board hanging plates are provided with a plurality of mounting holes along the plate surface in a surrounding manner at the same position.

Further, the display board comprises a mounting shaft and at least two clamping pieces. The mounting shaft and at least two clips are both made of an elastomeric material.

Optionally, the driving device includes: the first turntable is fixedly connected with the central rotating shaft, and the second turntable is fixedly connected with the driving output shaft of the stepping motor. The first turntable and the second turntable are proportionally provided with wheel diameter ratios according to requirements, gear teeth are arranged on the first turntable and the second turntable, and the first turntable and the second turntable are in transmission connection through matched toothed belts. The stepping motor is controlled by a microprocessor to rotate.

Optionally, the driving device includes: the stepping motor, the drive output of stepping motor and central pivot fixed connection, stepping motor's shell and supporting seat fixed connection. The stepping motor is controlled by a microprocessor to rotate.

Optionally, the driving device includes: the first turntable is fixedly connected with the central rotating shaft, and the second turntable is fixedly connected with the driving output shaft of the stepping motor. The first rotary table and the second rotary table are connected through a gear set with a transmission ratio set according to the required proportion. The stepping motor is controlled by a microprocessor to rotate.

Optionally, the driving device includes: the first turntable is fixedly connected with the central rotating shaft, and the second turntable is fixedly connected with the driving output shaft of the stepping motor. The first rotating disc and the second rotating disc are provided with rotating installation shafts at the same positions, and the first rotating disc) and the second rotating disc are connected with a connecting rod in a transmission way, wherein the connecting rod is connected with the rotating installation shafts in a rotating way. The stepping motor is controlled by a microprocessor to rotate.

Optionally, the driving device includes: the center rotating shaft is divided into two sections and is fixedly connected with the supporting seat respectively, and two output shafts of the double-shaft stepping motor are fixedly connected with the center rotating shaft respectively. The two display board hanging plates are respectively connected with the output shaft and/or the central rotating shaft in a rotating way, and the two display board hanging plates are fixedly connected with the shell of the double-shaft stepping motor.

Further, the driving output shaft of the stepping motor is externally connected through a transmission disc, and a permanent magnet is arranged on the inner side of the transmission disc. And a magnetic inductor is arranged at a specific position on the placement base. The signal output end of the magnetic inductor is in signal connection with the signal input end of the microprocessor, and the signal output end of the microprocessor is in signal connection with the control instruction input end of the stepping motor.

Further, a control module is arranged between the two supporting seats on the placing base. The control module is internally provided with a microprocessor, a controller and a power supply. And one signal input end of the microprocessor is in signal connection with the signal output end of the controller signal.

The controller comprises a time control module and a rotating speed control module. The time control module is used for sending duration time information to the microprocessor according to the input information. The rotating speed control module is used for sending rotating speed information to the microprocessor according to the input information. The microprocessor sends a control signal to the stepper motor based on the received duration information and rotational speed information.

The power supply is electrically connected with the stepping motor, the microprocessor and the controller and provides electric energy.

Further, the display board baffle rod is arranged at the position close to the edge of the horizontal shaft of the display board hanging cylinder along the rotation direction of the display board hanging cylinder, and the height is the position close to the top end of the display board after the display board is hung.

The utility model has the beneficial effects that: the utility model is light and convenient, and can display the complex information with a large-scale adjustable quantity according to the requirement. And the method can be used for outdoor advertisement display and desktop information display, and has a wide application range.

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of an information display device according to the present utility model.

Fig. 2 is a schematic structural view of the display board of the present utility model.

Fig. 3 is an enlarged schematic view of the portion a in fig. 2.

Fig. 4 shows a schematic structure of a driving device.

Fig. 5 is a schematic structural view of a second driving device.

Fig. 6 is a schematic structural view of a third driving device.

Fig. 7 shows a schematic diagram of the structure of the drive disk and the control module.

Fig. 8 is a schematic diagram showing the structure of the inventive driving disc.

In the figure: 1. support frame, 101, supporting seat, 102, connecting seat, 103, show tablet shelves pole, 104, place the base, 2, show tablet, 201, installation axle, 202, clamping piece, 203, the hidden discount, 3, show tablet hanging cylinder, 301, central pivot, 302 show tablet link plate, 4, first carousel, 5, second carousel, 6, tooth area, 7, control module, 8, step motor, 801, output shaft, 802, shell, 9, drive disk, 901, permanent magnet, 10, magnetic inductor, 11, microprocessor, 12, controller.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

Example 1

A rotary display information display device, as shown in fig. 1, comprising: the display card hanging device comprises a support frame 1, wherein a display card hanging cylinder 3 is rotatably connected to the support frame 1, a plurality of display cards 2 are hung on the display card hanging cylinder 3, and the display card hanging cylinder 3 is driven to rotate by a driving device.

The support frame 1 comprises a placing base 104, two or 3 or a designed number of support seats 101 according to the requirement are arranged on the placing base 104, and a display board hanging barrel 3 is rotatably arranged between two adjacent support seats 101. The top of the supporting seat 101 provided with the display card hanging cylinder 3 in a rotating mode is provided with a connecting seat 102, and a display card stop lever 103 for limiting the rotation of the display card 2 is arranged above the display card hanging cylinder 3 on the connecting seat 102.

The display board blocking rod 103 is arranged at the position close to the edge of the horizontal shaft of the display board hanging cylinder 3 along the rotation direction of the display board hanging cylinder 3, and the height is the position close to the top end of the display board 2 after the display board 2 is lapped.

The display card hanging barrel 3 comprises: a central rotation shaft 301 rotatably connected to the support base 101. The center rotating shafts 301 are respectively and symmetrically provided with display board hanging plates 302 at positions close to two sides of the supporting seat 101 along the section direction. A plurality of mounting holes are formed around the board surface at the same position on both display hanging boards 302.

The using process of the device is as follows: firstly, an information page which needs to be displayed is installed in a display board 2, and then the display board 2 with the information page is hung on a display board hanging barrel 3. And then placing the information display device at a desktop or outdoor position where information display is required, and starting the driving device. At this time, the driving device drives the display board hanging barrel 3 to rotate, for example, in fig. 1, the driving device drives the display board hanging barrel 3 to rotate anticlockwise, and further drives the display board 2 to rotate along the central rotating shaft 301. When the display board 2 rotates to the position of the display board stop lever 103, the display board cannot fall down due to dead weight under the shielding effect of the display board stop lever 103, so that the front information is displayed to the user. When the display board 2 continues to rotate, so that the upper end of the display board 2 is lower than the display board stop lever 103, the display board 2 rapidly falls onto the display board 2 leaning on before under the influence of rotation inertia and dead weight, and at the moment, the back information of the display board 2 is displayed to a user. And the display of the complex information is completed by circulating in this way.

By adopting the information display device for rotary display, the display card hanging barrel 3 with corresponding size can be arranged according to the requirement so as to hang the display cards 2 with the required quantity. Each display board 2 can display positive and negative two information, can display different information respectively as required, or adopt the paging setting for two upper and lower display boards 2 that are located the display position show a page information respectively, and then make up and obtain a great show information.

Example 2

The information display device based on the rotary display of embodiment 1, as shown in fig. 2, the display board 2 includes a mounting shaft 201 and two clips 202. The mounting shaft 201 and the two clips 202 are both made of an elastomeric material. For example: can be prepared from transparent PVC elastomer material.

With this arrangement, when the display board 2 needs to be replaced, the mounting shaft 201 and the two clips 202 are pressed, so that after the mounting shaft 201 and the two clips 202 are bent, the mounting shaft 201 is separated from the mounting hole, and the removal operation of the display board 2 is completed. Then the display board 2 to be replaced is pressed and bent, so that the mounting shaft 201 is inserted into the mounting hole in advance, then the hand is controlled to be started, the unfolding state of the display board 2 is restored under the self resilience force effect, and at the moment, the mounting shaft 201 is completely inserted into the mounting hole, and the mounting operation of the display board 2 is completed.

At this time, according to the need, the manner shown in fig. 3 may be selected, and several hidden buttons 203 are provided at the edges of the two clips 202 away from the mounting shaft 201, so as to initiate the purpose of detachably fixing the two clips 202, so that the information page between the clips 202 can be clamped more firmly.

Example 3

The information presentation apparatus based on the rotary presentation of embodiment 1, as shown in fig. 1 and 4, the driving apparatus includes: the first rotary disk 4 fixedly connected with the central rotary shaft 301 and the second rotary disk 5 fixedly connected with the driving output shaft of the driving motor 8. The first rotating disc 4 and the second rotating disc 5 are provided with wheel diameter ratios (for example, 1:1) according to the required proportion, gear teeth are arranged on the first rotating disc 4 and the second rotating disc 5, and the first rotating disc 4 and the second rotating disc 5 are in transmission connection through a matched toothed belt 6. The drive motor 8 is controlled to rotate by a microprocessor 11.

At this time, the driving motor 8 is controlled to drive the second turntable 5 to rotate, the second turntable 5 drives the first turntable 4 to rotate through the toothed belt 6, and then drives the central rotating shaft 301 to rotate, and finally, the display board hanging plate 302 drives the display board 2 to rotate. The driving motor 8 can be a stepping motor as required.

Example 4

The information presentation apparatus based on the rotary presentation of embodiment 1, as shown in fig. 5, the driving apparatus includes: the driving motor 8, the drive output end of driving motor 8 and central pivot 301 fixed connection, the shell and the supporting seat 101 fixed connection of driving motor 8. The drive motor 8 is controlled to rotate by a microprocessor 11.

At this time, the driving motor 8 is externally fixed and limited to rotate by the supporting seat 101, the driving motor 8 is controlled to drive the central rotating shaft 301 to rotate by the driving output end, and then the display board hanging plate 302 is driven to rotate, and finally the display board 2 is driven to rotate. The driving motor 8 can be a stepping motor as required.

Example 5

An information presentation apparatus based on the rotary presentation of embodiment 1, the driving apparatus comprising: the first rotary disk 4 fixedly connected with the central rotary shaft 301 and the second rotary disk 5 fixedly connected with the driving output shaft of the driving motor 8. The first rotating disc 4 and the second rotating disc 5 are proportionally provided with wheel diameter ratios (for example, 1:1) according to the requirement, and the first rotating disc 4 and the second rotating disc 5 are connected through a gear set with the transmission ratios (for example, 1:1) according to the requirement. The drive motor 8 is controlled to rotate by a microprocessor 11.

At this time, the driving motor 8 is controlled to drive the second turntable 5 to rotate, the second turntable 5 drives the first turntable 4 to rotate through the gear set, and then drives the central rotating shaft 301 to rotate, and finally drives the display board 2 to rotate through the display board hanging board 302. The driving motor 8 can be a stepping motor as required.

Example 6

An information presentation apparatus based on the rotary presentation of embodiment 1, the driving apparatus comprising: the first rotary disk 4 fixedly connected with the central rotary shaft 301 and the second rotary disk 5 fixedly connected with the driving output shaft of the driving motor 8. The first rotating disc 4 and the second rotating disc 5 are provided with rotating installation shafts at the same positions, and the first rotating disc 4 and the second rotating disc 5 are in transmission connection with connecting rods which are in rotating connection with the rotating installation shafts. The drive motor 8 is controlled to rotate by a microprocessor 11.

At this time, the driving motor 8 is controlled to drive the second turntable 5 to rotate, the second turntable 5 drives the first turntable 4 to rotate through the connecting rod, and then drives the central rotating shaft 301 to rotate, and finally drives the display board 2 to rotate through the display board hanging board 302. The driving motor 8 can be a stepping motor as required.

Example 7

The information presentation apparatus based on the rotary presentation of embodiment 1, as shown in fig. 6, the driving apparatus includes: the double-shaft driving motor 8, the central rotating shaft 301 is divided into two sections and is fixedly connected with the supporting seat 101 respectively, and two output shafts 801 of the double-shaft driving motor 8 are fixedly connected with the central rotating shaft 301 respectively. The two display board hanging boards 302 are respectively connected with the output shaft 801 and/or the central rotating shaft 301 in a rotating way, and the two display board hanging boards 302 are fixedly connected with the shell 802 of the double-shaft driving motor 8.

At this time, the two output shafts 801 of the driving motor 8 are fixed to the supporting base 101 through the central rotating shaft 301, so that when the driving motor 8 rotates under control, the output shafts 801 are not driven to rotate any more, but the casing 802 rotates along the output shafts 801, so as to drive the display board hanging plate 302 fixed to the casing 802 to rotate, and finally, the display board 2 is driven to rotate through the display board hanging plate 302. The driving motor 8 can be a stepping motor as required.

Example 8

The information display device based on the rotation display of any one of embodiments 3 to 7, as shown in fig. 7 and 8, the driving output shaft of the driving motor 8 is externally connected through a driving disc 9, and a permanent magnet 901 is arranged on the inner side of the driving disc 9. The placement base 104 is provided with the magnetic sensor 10 at a specific position. The signal output end of the magnetic inductor 10 is in signal connection with the signal input end of the microprocessor 11, and the signal output end of the microprocessor 11 is in signal connection with the control command input end of the driving motor 8.

The information display device of the utility model completes the display, the stay and the rotation of the information page by the fixed point, the fixed speed and the timing rotation of the driving device, wherein the timing and the fixed speed can be obtained according to the control of the stepping motor by the control program, and the fixed point is an important control node for determining whether the display page can be effectively displayed on the target display position.

According to the utility model, through the arrangement of the permanent magnet 901 and the magnetic inductor 10, when the device is started, the driving motor 8 is controlled to drive the driving disc 9 to rotate, when the magnetic inductor 10 senses the permanent magnet 901, the device is at the initial position, and then the display board 2 can be effectively stopped at the target position for display by constant speed and timing control.

Example 9

As shown in fig. 7, the information display device based on the rotation display of embodiment 8 is provided with a control module 7 between two supporting seats 101 on the placement base 104. The control module 7 is internally provided with a microprocessor 11, a controller 12 and a power supply. One signal input end of the microprocessor 11 is in signal connection with a signal output end of a signal of the controller 12.

The controller 12 includes a time control module and a rotational speed control module. The time control module is used to send duration information to the microprocessor 11 based on the input information. The rotation speed control module is used for sending rotation speed information to the microprocessor 11 according to the input information. The microprocessor 11 sends a control signal to the drive motor 8 based on the received duration information and rotational speed information.

The power supply is electrically connected with the driving motor 8, the microprocessor 11 and the controller 12 and provides electric energy.

According to the need, the time control module can be a control module obtained by combining a key-type input device, a singlechip and an LED display, wherein the key-type input device inputs adjustment information to the singlechip through a circuit board, the LED display displays current control instruction information of the singlechip in real time through the circuit board, and after receiving the adjustment instruction sent by the key-type input device, the singlechip obtains new control instruction information based on the corresponding increase and decrease of the current control instruction and sends the new control instruction information to the microprocessor 11.

For example: the control instruction recorded by the singlechip is 2.00 seconds currently, and the microprocessor 11 receives the information and then controls the driving motor 8 to rotate a preset angle each time and then stay for 2 seconds. The preset angle r=360/M is rotated, wherein M is the number of display cards 2 equally spaced on the display card hanging barrel 3. When the input of the key type input device is increased by a time unit, the control instruction recorded by the singlechip becomes 2.10 seconds, and the microprocessor 11 receives the information and then controls the driving motor 8 to rotate a preset angle each time and then stays for 2.1 seconds.

According to the present utility model, the rotation speed control module may be a control module obtained by combining a key input device, a single-chip microcomputer and an LED display, where the key input device inputs adjustment information to the single-chip microcomputer through a circuit board, the LED display displays current control instruction information of the single-chip microcomputer in real time through the circuit board, and after receiving the adjustment instruction sent by the key input device, the single-chip microcomputer obtains new control instruction information based on the current control instruction after corresponding increase and decrease, and sends the new control instruction information to the microprocessor 11.

For example: the control instruction recorded by the singlechip is 2.00 seconds currently, and the microprocessor 11 receives the information and then controls the driving motor 8 to rotate for a preset angle in 2 seconds. The preset angle r=360/M is rotated, wherein M is the number of display cards 2 equally spaced on the display card hanging barrel 3. When the input of the key type input device is increased by a time unit, the control instruction recorded by the singlechip becomes 2.10 seconds, and the microprocessor 11 receives the information and then controls the driving motor 8 to rotate for a preset angle within 2.1 seconds each time, namely the rotation speed is slowed down.

The information display device can flexibly adjust the information display time and the information update frequency according to the needs of clients, and the optimal information display effect is obtained.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims (10)

1. An information display device for rotary display, comprising: the display card rack comprises a support frame (1), wherein a display card hanging barrel (3) is rotatably connected to the support frame (1), a plurality of display cards (2) are hung on the display card hanging barrel (3), and the display card hanging barrel (3) is driven to rotate by a driving device;

the support frame (1) comprises a placing base (104), wherein at least two supporting seats (101) are arranged on the placing base (104), and a display board hanging cylinder (3) is rotatably arranged between every two adjacent supporting seats (101); the top of a supporting seat (101) rotatably provided with a display card hanging cylinder (3) is provided with a connecting seat (102), and a display card baffle rod (103) for limiting the rotation of a display card (2) is arranged above the display card hanging cylinder (3) by the connecting seat (102);

the display card hanging barrel (3) comprises: a central rotating shaft (301) rotatably connected with the supporting seat (101); the center rotating shafts (301) are respectively and symmetrically provided with display board hanging plates (302) along the section direction at the positions close to the two sides of the supporting seat (101); the two display hanging plates (302) are provided with a plurality of mounting holes along the plate surface in a surrounding manner at the same position.

2. The information display device of a rotary display according to claim 1, characterized in that the display board (2) comprises a mounting shaft (201) and at least two clips (202); the mounting shaft (201) and at least two clips (202) are both made of an elastomeric material.

3. The rotary display information display device according to claim 1, wherein the driving means includes: a first rotary table (4) fixedly connected with the central rotary shaft (301), and a second rotary table (5) fixedly connected with a driving output shaft of the driving motor (8); the first rotary table (4) and the second rotary table (5) are provided with wheel diameter ratios according to the required proportion, gear teeth are arranged on the first rotary table (4) and the second rotary table (5), and the first rotary table (4) and the second rotary table (5) are in transmission connection through a matched toothed belt (6); the driving motor (8) is controlled to rotate by a microprocessor (11).

4. The rotary display information display device according to claim 1, wherein the driving means includes: the driving motor (8), the driving output end of the driving motor (8) is fixedly connected with the central rotating shaft (301), and the shell of the driving motor (8) is fixedly connected with the supporting seat (101); the driving motor (8) is controlled to rotate by a microprocessor (11).

5. The rotary display information display device according to claim 1, wherein the driving means includes: a first rotary table (4) fixedly connected with the central rotary shaft (301), and a second rotary table (5) fixedly connected with a driving output shaft of the driving motor (8); the first rotary table (4) and the second rotary table (5) are proportionally provided with wheel diameter ratios according to the requirements, and the first rotary table (4) and the second rotary table (5) are connected through a gear set with transmission ratios according to the requirements; the driving motor (8) is controlled to rotate by a microprocessor (11).

6. The rotary display information display device according to claim 1, wherein the driving means includes: a first rotary table (4) fixedly connected with the central rotary shaft (301), and a second rotary table (5) fixedly connected with a driving output shaft of the driving motor (8); a rotary mounting shaft is arranged at the same position on the first rotary table (4) and the second rotary table (5), and a connecting rod in rotary connection with the rotary mounting shaft is in transmission connection between the first rotary table (4) and the second rotary table (5); the driving motor (8) is controlled to rotate by a microprocessor (11).

7. The rotary display information display device according to claim 1, wherein the driving means includes: the double-shaft driving motor (8), the central rotating shaft (301) is divided into two sections and is fixedly connected with the supporting seat (101) respectively, and two output shafts (801) of the double-shaft driving motor (8) are fixedly connected with one section of the central rotating shaft (301) respectively; the two display card hanging plates (302) are respectively connected with the output shaft (801) and/or the central rotating shaft (301) in a rotating way, and the two display card hanging plates (302) are both fixedly connected with the shell (802) of the double-shaft driving motor (8).

8. The information display device for rotary display according to any one of claims 3 to 7, wherein the drive output shaft of the drive motor (8) is externally connected through a transmission disc (9), and a permanent magnet (901) is arranged inside the transmission disc (9); the magnetic sensor (10) is arranged at a specific position on the placement base (104); the signal output end of the magnetic inductor (10) is in signal connection with the signal input end of the microprocessor (11), and the signal output end of the microprocessor (11) is in signal connection with the control command input end of the driving motor (8).

9. The information display device for rotary display according to claim 8, wherein a control module (7) is arranged between the two support bases (101) on the placement base (104); a microprocessor (11), a controller (12) and a power supply are arranged in the control module (7); a signal input end of the microprocessor (11) is in signal connection with a signal output end of a signal of the controller (12);

the controller (12) comprises a time control module and a rotating speed control module; the time control module is used for sending duration time information to the microprocessor (11) according to the input information; the rotating speed control module is used for sending rotating speed information to the microprocessor (11) according to the input information; the microprocessor (11) sends a control signal to the driving motor (8) according to the received duration time information and the rotation speed information;

the power supply is electrically connected with the driving motor (8), the microprocessor (11) and the controller (12) and provides electric energy.

10. The information display device for rotary display according to claim 1, wherein the display stop lever (103) is arranged at a position close to the edge of the horizontal shaft of the display hanging barrel (3) along the rotation direction of the display hanging barrel (3), and the height is a position close to the top end of the display (2) after the display (2) is lapped.