CN220796233U

CN220796233U - Cost comparison device

Info

Publication number: CN220796233U
Application number: CN202322294726.8U
Authority: CN
Inventors: 王洪霞; 李雪梅; 刘亚会
Original assignee: Shandong Architectural Design and Research Institute Co Ltd
Current assignee: Shandong Architectural Design and Research Institute Co Ltd
Priority date: 2023-08-25
Filing date: 2023-08-25
Publication date: 2024-04-16
Anticipated expiration: 2033-08-25

Abstract

The utility model discloses a manufacturing cost comparison device which comprises a base, wherein a supporting plate is arranged above the base, a first display comparison plate is arranged above the supporting plate, the manufacturing cost data is displayed and compared through the first display comparison plate, a vertical guide driving mechanism is fixedly connected between the top of the base and the bottom of the supporting plate and used for driving the supporting plate to vertically move, and the top of the supporting plate is movably contacted with a rotating plate. According to the utility model, through a series of structural arrangement, the second display contrast plate can be moved and fixed from the storage groove when in use, the second display contrast plate can be stored and fixed after use, the total volume of the whole device is reduced, the device is convenient to carry and transport, the display heights and the display orientation angles of the first display contrast plate and the second display contrast plate can be adjusted according to display needs, the use flexibility is improved, the whole device is not required to be moved by personnel to adjust, and the operation of personnel is convenient.

Description

Cost comparison device

Technical Field

The utility model relates to the technical field of cost comparison equipment, in particular to a cost comparison device.

Background

The engineering cost is defined from the viewpoint of owners, namely, the engineering cost is the investment cost of all fixed assets for the expected payment or the actual payment of the construction of one engineering, and the data comparison is needed in the calculation process, so that a cost data comparison device is needed, the existing data comparison device is fixed in structure and influenced by different observation angles or other factors, people cannot intuitively know the comparison of various data, and the display effect is poor, and the application number is that: 202021505727.2A construction cost data comparison device comprises a base, wherein a movable wheel is arranged at the bottom of the base, a fixed box is fixedly arranged at the top of the base, a fixed groove is formed in the fixed box, a through groove is formed in the top of the fixed box, and a hydraulic push rod with one end penetrating the fixed box and extending to the inside of the through groove is fixedly arranged in the fixed groove; according to the engineering cost data comparison device, the display plates are arranged, when the engineering cost data comparison device is used, the engineering cost data are respectively stuck to the two display plates, so that the data can be displayed separately, poor comparison effect caused by excessively complicated data is avoided, the hydraulic push rod is started to drive the display plates to ascend or descend through the movable seat and the connecting block, the height of the display plates can be adjusted according to the use condition, people can intuitively know the comparison of various data, and the display effect is better;

above-mentioned patent is through setting up two show boards cooperation to the mode of show board oscilaltion to make people can intuitively know the contrast of multiple data, make the bandwagon effect better, but it still has some not enough: 1. the two display boards are arranged, so that an effective display effect can be achieved, but the total volume is large, and the portable display board is inconvenient to carry and transport; 2. the orientation angle during the show can not be adjusted according to the use needs in a flexible way, and it needs whole device of removal to adjust, can not satisfy the user demand, combines the above-mentioned condition, consequently we have provided a cost comparison device.

Disclosure of Invention

The utility model aims to solve the defects in the prior art and provides a manufacturing cost comparison device.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a cost comparison device, includes the base, the top of base is equipped with the backup pad, and the top of backup pad is equipped with first show contrast board, demonstrates the contrast to cost data through first show contrast board, fixedly connected with vertical direction actuating mechanism between the top of base and the bottom of backup pad, vertical direction actuating mechanism is used for driving backup pad vertical movement, and the top movable contact of backup pad has the rotor plate, and the bottom of backup pad inlays the band-type brake motor that is fixed with the output shaft and is connected with the bottom of rotor plate, and the band-type brake motor is used for driving the rotor plate and rotates, and the top of rotor plate and the bottom fixed connection of first show contrast board, and the storage tank has been seted up on the right side of first show contrast board, and the movable sleeve is equipped with the second show contrast board in the storage tank, and the second show contrast board is used for demonstrate the contrast to cost data, the right side of the second display contrast plate is fixedly connected with a guide supporting mechanism which is movably contacted with the right side of the first display contrast plate, the guide supporting mechanism is used for supporting the second display contrast plate, the rotating plate is sleeved on the guide supporting mechanism in a sliding way, the top of the second display contrast plate is provided with a groove, the inner walls of the two sides of the groove and the inner wall of the top of the storage groove are fixedly connected with a first guide mechanism, the first guide mechanism plays a transverse guide effect on the second display contrast plate, the inner wall of the bottom of the storage groove is embedded and fixed with a hard rubber, the left side of the top of the hard rubber is tightly contacted with an elastic pressing mechanism, under the action of friction force between the hard rubber and the elastic pressing mechanism, the top of the elastic pressing mechanism penetrates through the groove and extends to the upper part of the first display contrast plate, the second display contrast plate is sleeved on the elastic pressing mechanism.

Preferably, the vertical guiding driving mechanism comprises four guiding rods fixedly connected to the top of the base, guiding pipes are sleeved on the guiding rods in a sliding mode, the top ends of the guiding pipes are fixedly connected to the bottom of the supporting plate, the guiding pipes are matched with the guiding rods, the supporting plate is vertically guided, the top of the base is embedded and fixed with a first electric telescopic rod fixedly connected with the output shaft and the bottom of the supporting plate, and the first electric telescopic rod is used for driving the supporting plate to vertically move.

Preferably, the guide supporting mechanism comprises a vertical rod fixedly connected to the right side of the second display contrast plate, a U-shaped handle is fixedly connected to the right side of the vertical rod, supporting blocks are fixedly connected to the two sides of the bottom of the vertical rod respectively, an output shaft is arranged below the supporting blocks and is fixedly connected with second electric telescopic rods at the bottoms of the supporting blocks, the second electric telescopic rods are used for driving the supporting blocks to vertically move, moving rods are fixedly connected to the tops of the left sides of the supporting blocks, the moving rods are slidably sleeved on the two moving rods, the moving rods play a transverse guiding effect on the corresponding supporting blocks and the second electric telescopic rods, universal wheels with locks are rotatably arranged at the bottom ends of the second electric telescopic rods and the four corners of the bottom of the base respectively, and the whole device is convenient to move.

Preferably, the first guiding mechanism comprises a positioning rod fixedly connected between the inner walls of the two sides of the groove, a guiding block is sleeved on the positioning rod in a sliding manner, and the top of the guiding block is fixedly connected with the inner wall of the top of the storage groove.

Preferably, the elastic pressing mechanism comprises a pressing block, the left side of the bottom of the second display contrast plate is provided with a rectangular groove, the pressing block is slidably sleeved in the rectangular groove, the bottom of the pressing block is fixedly connected with a plurality of sharp blocks, the bottom of the sharp blocks is in tight contact with the top of the hard rubber, the pressing block is fixed under the action of friction force between the sharp blocks and the hard rubber, the top of the pressing block is fixedly connected with a pull rod, the top of the pull rod penetrates through a groove to extend to the upper side of the first display contrast plate and is fixedly connected with a pull ring, the first display contrast plate and the second display contrast plate are slidably sleeved on the pull rod, the pull rod is located at the front side of the positioning rod, the top of the pressing block is fixedly connected with a compression spring in a compression state between the top inner wall of the rectangular groove, the compression spring is movably sleeved on the pull rod, and the compression spring in the compression state is arranged to enable the pressing block to always drive a downward extrusion force of the pressing block, so that the pressing block drives a plurality of sharp blocks to give the hard rubber a downward extrusion force to the hard rubber, and the tight contact stability is improved.

Preferably, the top of the supporting plate is annular and embedded with a plurality of supporting balls, the supporting balls are movably contacted with the bottom of the rotating plate, and the rotating plate is supported by the plurality of supporting balls.

Preferably, a first rectangular perforation is formed in the inner wall of the top of the storage groove, a second rectangular perforation communicated with the bottom of the groove is formed in the inner wall of the top of the rectangular groove, the inner wall of the second rectangular perforation is slidably sleeved with the outer side of the pull rod, and the front inner wall and the rear inner wall of the first rectangular perforation are respectively in movable contact with the front side and the rear side of the pull rod.

Compared with the prior art, the utility model has the beneficial effects that:

the vertical guide driving mechanism is matched with the two second electric telescopic rods, so that the display height positions of the first display contrast plate and the second display contrast plate can be adjusted according to use requirements;

the band-type brake motor is matched with the rotating plate, so that the display orientation angles of the first display contrast plate and the second display contrast plate can be adjusted according to use requirements, the whole device is not required to be adjusted, and the use flexibility is improved;

through accomodating groove, direction supporting mechanism, first guiding mechanism, hard rubber and elasticity and press solid mechanism to cooperate, can be when moving out the second show contrast board from accomodating the inslot and fixed, and can accomodate the second show contrast board after using, reduce the total volume of whole device, conveniently carry the transportation;

according to the utility model, through a series of structural arrangement, the second display contrast plate can be moved and fixed from the storage groove when in use, the second display contrast plate can be stored and fixed after use, the total volume of the whole device is reduced, the device is convenient to carry and transport, the display heights and the display orientation angles of the first display contrast plate and the second display contrast plate can be adjusted according to display needs, the use flexibility is improved, the whole device is not required to be moved by personnel to adjust, and the operation of personnel is convenient.

Drawings

FIG. 1 is a schematic diagram of a cost comparison device according to the present utility model;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

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

In the figure: 100. a base; 101. a support plate; 102. a first display contrast panel; 103. a guide tube; 104. a guide rod; 105. a first electric telescopic rod; 1. a band-type brake motor; 2. a rotating plate; 3. a vertical rod; 4. a second electric telescopic rod; 5. a moving rod; 6. a groove; 7. a positioning rod; 8. a guide block; 9. a pull rod; 10. a storage groove; 11. a second display contrast panel; 12. rectangular grooves; 13. pressing and fixing the block; 14. hard rubber; 15. a sharp block; 16. a compression spring; 17. and a supporting block.

Description of the embodiments

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.

Referring to fig. 1-3, a cost comparison device comprises a base 100, a supporting plate 101 is arranged above the base 100, the top of the base 100 and the top of the supporting plate 101 are of round structures, a first display comparison plate 102 is arranged above the supporting plate 101, cost data are displayed and compared through the first display comparison plate 102, a vertical guide driving mechanism is fixedly connected between the top of the base 100 and the bottom of the supporting plate 101, the vertical guide driving mechanism comprises four guide rods 104 fixedly connected to the top of the base 100, guide pipes 103 are slidably sleeved on the guide rods 104, the top ends of the guide pipes 103 are fixedly connected to the bottom of the supporting plate 101, the guide pipes 103 are matched with the guide rods 104, the effect of vertical guide is achieved on the supporting plate 101, a first electric telescopic rod 105 with an output shaft fixedly connected to the bottom of the supporting plate 101 is embedded and fixed to the top of the base 100, a first embedding groove for fixedly installing the first electric telescopic rod 105 is formed in the bottom of the base 100, and the first electric telescopic rod 105 is used for driving the supporting plate 101 to move vertically;

the top movable contact of the supporting plate 101 is provided with a rotating plate 2, wherein the top of the supporting plate 101 is in annular embedded shape and is provided with a plurality of supporting balls, the supporting balls are in movable contact with the bottom of the rotating plate 2, the rotating plate 2 is supported by the plurality of supporting balls, the bottom of the supporting plate 101 is embedded and fixed with a band-type brake motor 1 with an output shaft connected with the bottom of the rotating plate 2, the bottom of the supporting plate 101 is provided with a second embedded groove, the inner wall of the second embedded groove is fixedly connected with the outer side of the band-type brake motor 1, the inner wall of the top of the second embedded groove is provided with a movable hole, the movable hole is in movable contact with the outer side of the output shaft of the band-type brake motor 1, the band-type brake motor 1 is used for driving the rotating plate 2 to rotate, the top of the rotating plate 2 is fixedly connected with the bottom of a first display contrast plate 102, the right side of the first display contrast plate 102 is provided with a storage groove 10, and a second display contrast plate 11 is movably sleeved in the storage groove 10 for displaying and comparing cost data;

the right side of the second display contrast plate 11 is fixedly connected with a guide supporting mechanism which is in movable contact with the right side of the first display contrast plate 102, the rotating plate 2 is slidably sleeved on the guide supporting mechanism, the guide supporting mechanism comprises a vertical rod 3 fixedly connected to the right side of the second display contrast plate 11, the right side of the vertical rod 3 is fixedly connected with a U-shaped handle, the two sides of the bottom of the vertical rod 3 are fixedly connected with supporting blocks 17, an output shaft and a second electric telescopic rod 4 fixedly connected with the bottom of the supporting blocks 17 are arranged below the supporting blocks 17, the second electric telescopic rod 4 is used for driving the supporting blocks 17 to vertically move, the top of the left side of the supporting blocks 17 is fixedly connected with a movable rod 5, the rotating plate 2 is slidably sleeved on the two movable rods 5, two guide grooves are formed in the right side of the rotating plate 2, the inner walls of the guide grooves are slidably sleeved on the outer sides of the corresponding movable rods 5, the movable rods 5 play a transverse guide effect on the corresponding supporting blocks 17 and the second electric telescopic rod 4, the bottom ends of the second electric telescopic rod 4 and the four corners of the bottom of the base 100 are rotatably provided with universal wheels, and the universal wheels with the universal wheels are convenient to move;

the top of the second display contrast plate 11 is provided with a groove 6, a first guide mechanism is fixedly connected between the inner walls of the two sides of the groove 6 and the inner wall of the top of the storage groove 10, the first guide mechanism comprises a positioning rod 7 fixedly connected between the inner walls of the two sides of the groove 6, a guide block 8 is sleeved on the positioning rod 7 in a sliding manner, a guide hole is formed in the right side of the guide block 8, the inner wall of the guide hole is sleeved with the outer side of the positioning rod 7 in a sliding manner, and the top of the guide block 8 is fixedly connected with the inner wall of the top of the storage groove 10;

the inner wall of the bottom of the accommodating groove 10 is embedded and fixed with a hard rubber 14, wherein the inner wall of the bottom of the accommodating groove 10 is provided with a third groove for fixedly mounting the hard rubber 14, the left side of the top of the hard rubber 14 is closely contacted with an elastic pressing mechanism, the top of the elastic pressing mechanism penetrates through the groove 6 and extends to the upper part of the first display contrast plate 102, the second display contrast plate 11 is sleeved on the elastic pressing mechanism, the elastic pressing mechanism comprises a pressing block 13, the left side of the bottom of the second display contrast plate 11 is provided with a rectangular groove 12, the pressing block 13 is slidably sleeved in the rectangular groove 12, the bottom of the pressing block 13 is fixedly connected with a plurality of sharp blocks 15, the bottom of the sharp blocks 15 is closely contacted with the top of the hard rubber 14, the fixation of the second display contrast plate 11 is realized under the action of friction force between the sharp blocks 15 and the hard rubber 14, the top of the pressing block 13 is fixedly connected with a pull rod 9, the top end of the pull rod 9 penetrates through the groove 6 to extend to the upper part of the first display contrast plate 102 and is fixedly connected with a pull ring, the first display contrast plate 102 and the second display contrast plate 11 are both sleeved on the pull rod 9 in a sliding way, wherein a first rectangular through hole is formed in the inner wall of the top of the accommodating groove 10, a second rectangular through hole communicated with the bottom of the groove 6 is formed in the inner wall of the top of the rectangular groove 12, the inner wall of the second rectangular through hole is sleeved with the outer side of the pull rod 9 in a sliding way, the front inner wall and the rear inner wall of the first rectangular through hole are respectively and movably contacted with the front side and the rear side of the pull rod 9, the pull rod 9 is positioned at the front side of the positioning rod 7, a compression spring 16 in a compression state is fixedly connected between the top of the pressing fixed block 13 and the inner wall of the top of the rectangular groove 12, the compression spring 16 is movably sleeved on the pull rod 9, the compression spring 16 in a compression state is arranged, the utility model can always give the pressing block 13 a downward extrusion force, so that the pressing block 13 drives a plurality of sharp blocks 15 to give the hard rubber 14 a downward extrusion force, so that the sharp blocks 15 can be in close contact with the hard rubber 14, and the fixing stability is improved.

Working principle: when the second display contrast plate 11 is positioned in the storage groove 10, the whole device is small in total volume and convenient to carry, the whole device can be moved through the universal wheels with the locks, and when the device is moved to a designated place to perform data comparison operation, the pull ring is pulled upwards to drive the pull rod 9 to move upwards, the pull rod 9 drives the press fixing block 13 to move upwards, the press fixing block 13 compresses the compression spring 16 while moving upwards, the press fixing block 13 drives the plurality of sharp blocks 15 to be separated from the hard rubber 14, the fixation of the second display contrast plate 11 is released, at the moment, the vertical rod 3 can be pulled rightwards through the U-shaped handle, the vertical rod 3 drives the second display contrast plate 11 to gradually move out of the storage groove 10, the shielding of the second display contrast plate 11 is released, the second display contrast plate 11 drives the positioning rod 7 to slide in the guide hole on the guide block 8, the vertical rods 3 move rightwards and simultaneously drive the two supporting blocks 17 to move rightwards, the supporting blocks 17 drive the corresponding moving rods 5, the second electric telescopic rods 4 and the universal wheels with locks to move rightwards, when the second display contrast plate 11 moves rightwards to a required display area, the U-shaped handles can be stopped to be pulled, the upward tension of the pull rings is released, the elastic force of the compression springs 16 in a compressed state drives the pressing blocks 13 to move downwards, the pressing blocks 13 drive the plurality of sharp blocks 15 to move downwards to be in close contact with the top of the hard rubber 14, the second display contrast plate 11 is fixed under the friction force between the sharp blocks 15 and the hard rubber 14, the second display contrast plate 11 can be normally used at the moment, and the manufacturing cost data comparison display can be carried out on the first display contrast plate 102 and the second display contrast plate 11;

when the supporting heights of the first display contrast plate 102 and the second display contrast plate 11 are adjusted according to display requirements, the first electric telescopic rod 105 and the two second electric telescopic rods 4 are positively started, the output shaft of the first electric telescopic rod 105 drives the supporting plate 101 to move upwards, the supporting plate 101 drives the four guide pipes 103 to slide upwards on the corresponding guide rods 104 respectively, the supporting plate 101 drives the first display contrast plate 102 to move upwards through the rotating plate 2, meanwhile, the output shaft of the second electric telescopic rod 4 drives the second display contrast plate 11 to move upwards through the corresponding supporting blocks 17 and the vertical rods 3 in sequence, so that the first display contrast plate 102 and the second display contrast plate 11 move upwards simultaneously, the display heights of the first display contrast plate 102 and the second display contrast plate 11 are changed, and when the display heights are adjusted according to use requirements, the first electric telescopic rod 105 and the second electric telescopic rod 4 are stopped, the mode of adjusting the display heights is convenient for later personnel to intuitively watch data conditions;

when the orientation angle of the display is adjusted according to the display requirement, the band-type brake motor 1 is started, the output shaft of the band-type brake motor 1 drives the rotating plate 2 to rotate, the rotating plate 2 drives the first display contrast plate 102 to rotate, the rotating plate 2 also drives the second display contrast plate 11 to rotate sequentially through the two movable rods 5, the two supporting blocks 17 and the vertical rods 3, and meanwhile, the supporting blocks 17 drive the corresponding second electric telescopic rods 4 and the locked universal wheels to rotate, so that the orientation angles of the first display contrast plate 102 and the second display contrast plate 11 are changed, and when the display angle is adjusted according to the use requirement, the band-type brake motor 1 is stopped, so that the adjustment of the display orientation angle is realized, the whole device is not required to be integrally adjusted by personnel in an electric drive mode of adjusting the orientation angle, and the operation of personnel is facilitated;

after the use, when reducing the total volume of whole device, start band-type brake motor 1 again for first show contrast board 102 and second show contrast board 11 rotate to with base 100 alignment, then reverse start first electric telescopic handle 105 and two second electric telescopic handle 4, make first show contrast board 102 and second show contrast board 11 decline the height downwards, immediately upwards pull the pull ring again, make a plurality of sharp pieces 15 upwards separate with hard rubber 14 again, remove the fixation to second show contrast board 11, then move second show contrast board 11 to the left and accomodate in the storage tank 10, after accomodate, loosen the pulling force to the pull ring, make a plurality of sharp pieces 15 move down again to with the top in close contact of hard rubber 14, under the frictional force effect between sharp piece 15 and hard rubber 14, realize the fixation to second show contrast board 11, make the total volume of whole device reduce, conveniently carry the transportation.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a cost comparison device, including base (100), the top of base (100) is equipped with backup pad (101), the top of backup pad (101) is equipped with first show contrast board (102), a serial communication port, fixedly connected with vertical direction actuating mechanism between the bottom of top and backup pad (101) of base (100), the top movable contact of backup pad (101) has rotating plate (2), the bottom of backup pad (101) inlays and is fixed with band-type brake motor (1) that the output shaft is connected with the bottom of rotating plate (2), the top of rotating plate (2) and the bottom fixed connection of first show contrast board (102), accomodate groove (10) have been seted up on the right side of first show contrast board (102), accomodate groove (10) interior movable sleeve is equipped with second show contrast board (11), the right side fixedly connected with the guide support mechanism of the right side movable contact of first show contrast board (102), rotating plate (2) sliding sleeve is established on guide support mechanism, recess (6) have been seted up at the top of second show contrast board (11) and are inlayed and are had recess (14) between the inner wall (14) of a rigid plastic film fixedly connected with top of first show contrast board (14) and are glued on the inner wall (14) of a rigid film fixedly contact, the top of the elastic pressing mechanism penetrates through the groove (6) and extends to the upper portion of the first display contrast plate (102), and the second display contrast plate (11) is sleeved on the elastic pressing mechanism.

2. The manufacturing cost comparison device according to claim 1, wherein the vertical guiding driving mechanism comprises four guiding rods (104) fixedly connected to the top of the base (100), guiding pipes (103) are sleeved on the guiding rods (104) in a sliding mode, the top ends of the guiding pipes (103) are fixedly connected with the bottom of the supporting plate (101), and a first electric telescopic rod (105) fixedly connected with the output shaft and the bottom of the supporting plate (101) is embedded and fixed to the top of the base (100).

3. The manufacturing cost comparison device according to claim 2, wherein the guiding support mechanism comprises a vertical rod (3) fixedly connected to the right side of the second display comparison plate (11), the right side of the vertical rod (3) is fixedly connected with a U-shaped handle, two sides of the bottom of the vertical rod (3) are fixedly connected with support blocks (17), an output shaft and a second electric telescopic rod (4) fixedly connected to the bottom of the support blocks (17) are arranged below the support blocks (17), a movable rod (5) is fixedly connected to the top of the left side of the support blocks (17), the movable rod (5) is sleeved with the rotary plate (2) in a sliding mode, and universal wheels with locks are rotatably installed at the bottom ends of the second electric telescopic rods (4) and the four corners of the bottom of the base (100).

4. A cost comparison apparatus according to claim 3, wherein the first guiding mechanism comprises a positioning rod (7) fixedly connected between inner walls of two sides of the groove (6), a guiding block (8) is slidably sleeved on the positioning rod (7), and the top of the guiding block (8) is fixedly connected with the inner wall of the top of the accommodating groove (10).

5. The manufacturing cost comparison device according to claim 4, wherein the elastic pressing mechanism comprises a pressing block (13), a rectangular groove (12) is formed in the left side of the bottom of the second display comparison plate (11), the pressing block (13) is slidably sleeved in the rectangular groove (12), the bottom of the pressing block (13) is fixedly connected with a plurality of pointed blocks (15), the bottom of the pointed blocks (15) is tightly contacted with the top of the hard rubber sheet (14), the top of the pressing block (13) is fixedly connected with a pull rod (9), the top of the pull rod (9) penetrates through the groove (6) to extend to the upper side of the first display comparison plate (102) and is fixedly connected with a pull ring, the first display comparison plate (102) and the second display comparison plate (11) are slidably sleeved on the pull rod (9), the pull rod (9) is located on the front side of the positioning rod (7), a compression spring (16) in a compression state is fixedly connected between the top of the pressing block (13) and the top inner wall of the rectangular groove (12), and the compression spring (16) is movably sleeved on the pull rod (9).

6. A cost comparison apparatus according to claim 1, wherein the top of the supporting plate (101) is formed in a ring shape and is fitted with a plurality of supporting balls which are in movable contact with the bottom of the rotating plate (2).

7. The cost comparison device according to claim 5, wherein a first rectangular through hole is formed in the top inner wall of the accommodating groove (10), a second rectangular through hole communicated with the bottom of the groove (6) is formed in the top inner wall of the rectangular groove (12), the inner wall of the second rectangular through hole is slidably sleeved with the outer side of the pull rod (9), and the front inner wall and the rear inner wall of the first rectangular through hole are respectively in movable contact with the front side and the rear side of the pull rod (9).