A project cost progress management device

Abstract

The present invention discloses a project cost progress management device, belonging to the field of project cost. It includes a base, on the upper surface of the base, symmetrically and fixedly connected support seats are provided, at the top of the two support seats, a display cabinet is fixedly connected, on the front surface of the display cabinet, a plurality of transparent covers are detachably installed by bolts, in front of the lower surface of the base, a plurality of liquid storage boxes are fixedly connected, and a liquid replacement pipe is fixedly connected between the liquid storage box and the transparent cover; start the biaxial motor, control the display block to rotate, and replace the display surface, so as to display the names of different projects. The display cabinet is used to display the contents of different sub-projects, and the transparent cover is used to protect the displayed contents of the display cabinet from dust. Under normal conditions, under the push of the first spring, the piston plate will fill the liquid inside the liquid storage box into the transparent cover to block the transparent cover, so that the sub-project contents corresponding to the projects not displayed on the display block are blocked.

Description

Technical Field

[0001] The invention relates to the field of engineering cost, and in particular to an engineering cost progress management device. Background Art

[0002] Project cost refers to the total estimated or actual construction cost for completing a project. Its accuracy is directly related to whether the project can proceed normally. Project cost statistics require relevant supervisors to supervise and manage the work of cost statistics staff. This method is relatively cumbersome and cannot guarantee the timeliness of supervision and management. In addition, the supervision and management efficiency is low, resulting in a waste of human resources. Therefore, a special progress management device is needed to assist in progress management.

[0003] Patent Publication No. (CN211742500U) discloses a construction cost progress management device, including a management board, the outer wall of one end of the management board is provided with three placement slots, and the upper side of the opening end of each placement slot is connected to a dustproof transparent plate through a torsion spring, and each dustproof transparent plate is provided with a card slot 1 on the bottom outer wall, and each placement slot is provided with a mounting slot below, and a limit slot is provided on the inner wall above the mounting slot. The device is provided with a dustproof transparent plate, card slot 1, mounting slot, card block, knob, connecting spring, limit slot and card slot 2. After the staff pastes the project schedule into the placement slot, the dustproof transparent plate is pressed into the placement slot, and then the card block in the mounting slot is disengaged from the limit slot by pressing the knob with the palm of the hand, and then the knob is rotated to make the card block rotate in card slot 2 until it enters card slot 1 of the dustproof transparent plate, so that the dustproof transparent plate can be limited and fixed to protect the project schedule in the placement slot from being damaged;

[0004] The above technology is not convenient for displaying multiple projects and corresponding sub-projects according to the engineering cost separately, and it is not convenient for displaying different sub-projects in different positions. Improvement is needed. For this purpose, we propose a engineering cost progress management device. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a device for displaying a plurality of different items in a construction cost in correspondence with their respective sub-items; another purpose of the present invention is to provide a device for displaying different sub-items in different positions.

[0006] Technical solution: A construction cost progress management device, comprising a base, the upper surface of the base is symmetrically fixedly connected with a support seat, the tops of the two support seats are fixedly connected with a display cabinet, the front surface of the display cabinet is disassembled and installed with multiple transparent covers by bolts, the front of the lower surface of the base is fixedly connected with multiple liquid storage boxes, the liquid storage boxes and the transparent covers are fixedly connected with a liquid replacement pipe, the interior of the liquid storage box is slidably connected with a piston plate, a spring is fixedly connected between the piston plate and the liquid storage box, and the rear surface of the piston plate is fixedly connected with a push block;

[0007] The upper surface of the display cabinet is symmetrically fixedly connected with a mounting seat, and a display block is rotatably connected between the two display cabinets via a rotating shaft. A double-axis motor is fixedly connected to the right side of the mounting seat located on the left side of the upper surface of the display cabinet, and the right end of the output shaft of the double-axis motor is fixedly connected to the left side of the display block;

[0008] The left end of the output shaft of the dual-axis motor is fixedly connected to bevel gear one, and the left side of the display cabinet is fixedly connected to a shaft rod seat, the interior of the shaft rod seat is rotatably connected to a linkage vertical rod via a rotating shaft, the top and bottom ends of the linkage vertical rod are respectively fixedly connected to bevel gear two and bevel gear three, the bevel gear two is meshingly connected to the bevel gear one, a linkage cross bar is rotatably connected between the two support seats via a rotating shaft, the left end of the linkage cross bar is fixedly connected to bevel gear four, the bevel gear three is meshingly connected to the bevel gear four, the outer side wall of the linkage cross bar is located behind the plurality of pushed blocks and is fixedly connected to a disc, and the outer side wall of the disc is integrally formed with an arc-shaped stop block.

[0009] Furthermore, the display cabinet is provided with a plurality of display cavities, wherein a plurality of transmission rollers and a transmission cylinder are rotatably connected to the display cavities via a rotating shaft, and a display belt is commonly transmission-connected between the plurality of transmission rollers and the transmission cylinder in the same display cavity.

[0010] Furthermore, the transparent cover is a hollow rectangular structure with an opening on the upper surface, the interior of the transparent cover is slidably connected to a piston bar, the upper surface of the piston bar is fixedly connected to an inner wiping bar, both sides of the upper surface of the transparent cover are fixedly connected to fixed blocks, an outer wiping bar is slidably connected below the outer side wall of the transparent cover, two traction ropes are fixedly connected to the upper surface of the outer wiping strip, the top end of the traction rope passes through the fixed block and is fixedly connected to the upper surface of the piston bar.

[0011] Furthermore, an L-shaped hook 1 is fixedly connected to the front surface of the fixing block, and two L-shaped hooks 2 are fixedly connected to the front surface of the outer wiping strip.

[0012] Furthermore, a hollow tube is commonly provided on the inner side of the plurality of transmission cylinders, and the hollow tube is rotatably connected to the display cabinet via a rotating shaft, and an air cavity 1 is opened inside the hollow tube located on the inner side of the plurality of transmission cylinders, and a piston plate is slidably connected inside the air cavity 1, and a push column is fixedly connected to the upper surface of the piston plate, and the top ends of two adjacent push columns are commonly fixedly connected with an arc-shaped abutment plate.

[0013] Furthermore, the bottoms of the plurality of air cavities 1 are located inside the hollow tube and are fixedly connected with ventilation hoses.

[0014] Furthermore, an inflation box is fixedly connected between the two support seats, a plurality of air cavities 2 are opened inside the inflation box, a piston block is slidably connected inside the air cavity 2, a plurality of springs 2 are fixedly connected between the piston block and the air cavity 2, a plurality of air grooves are integrally formed on the rear surface of the air cavity 2 located inside the inflation box, the plurality of air grooves are fixedly connected to the opposite ends of the plurality of ventilation hoses, and the front surfaces of the plurality of piston blocks are located behind the plurality of discs and are fixedly connected to elastic pressure rods.

[0015] Furthermore, the right end of the hollow tube passes through the right side of the display cabinet, and a swivel is fixedly connected to the outer sides of the plurality of ventilation hoses.

[0016] Furthermore, an outer side wall of the disk is integrally formed with an arc notch, and the arc notch is matched with the elastic pressure rod.

[0017] Beneficial effects: start the dual-axis motor to control the display block to rotate and change the display surface, so that the names of different projects can be displayed. The display cabinet is used to display different sub-project contents. The transparent cover is used to protect the display cabinet display contents from dust. Under normal conditions, under the push of the spring, the piston plate will fill the liquid in the liquid storage box into the transparent cover to cover the transparent cover, so that the sub-project contents corresponding to the items not displayed on the display block are covered. Under the meshing transmission of multiple gears, the linkage cross bar can be controlled to rotate, so that the arc-shaped resisting block can squeeze the pushed block in turn, so that the piston plate moves forward. At this time, the liquid used to cover the content in the transparent cover can be extracted into the liquid storage box, so that the transparent cover at this position can view the sub-project display content;

[0018] The transmission roller, the transmission cylinder and the display belt form a mechanism that can change the display surface through transmission, so that the display belt can change different display surfaces through transmission, and then it is convenient to display the contents of the sub-items written on the display belt separately;

[0019] When the liquid inside the transparent cover is extracted, the piston bar will descend along the inside of the transparent cover, and the inner wiping bar can wipe the inside of the transparent cover to avoid the residual part of the shielding liquid affecting people's viewing of the displayed content on the display belt through the transparent cover. At the same time, the outer wiping bar will rise along the outside of the transparent cover under the pull of the traction rope to wipe the surface of the transparent cover to avoid dust and other problems affecting viewing. An elastic member for resetting is conveniently hung between the two L-shaped hooks facing each other, so that when the inner wiping bar rises along the inside of the transparent cover, the outer wiping bar is pulled along the transparent cover to slide down and reset with the help of the elastic member;

[0020] When the arc-shaped support block on the disc presses against the pushed block, the elastic pressure rod at that position will move to the inner side of the arc notch on the disc, causing the piston block to move forward, so that the air chamber 2 at that location will extract the internal gas of the corresponding air chamber 1 through the ventilation hose, thereby controlling the arc-shaped support block to press against the inner side of the transmission cylinder, so that when the hollow tube rotates, a single transmission cylinder can be controlled to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view structural schematic diagram of the present invention;

[0022] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0023] Figure 3 is a front view structural schematic diagram of the display cabinet of the present invention;

[0024] Figure 4 It is a schematic diagram of the side view connection structure of the transmission belt, transmission roller and transmission cylinder of the present invention;

[0025] Figure 5 It is a schematic diagram of the cross-sectional connection structure of the transparent cover, the inner wiping strip and the outer wiping strip of the present invention;

[0026] Figure 6 It is a schematic diagram of the connection structure of the linkage cross bar and the disc of the present invention;

[0027] Figure 7 is a schematic diagram of a top view of a cross section of a liquid storage box of the present invention;

[0028] Figure 8 is a schematic diagram of the top view of the cross section of the inflatable box of the present invention;

[0029] Fig. 9 It is a schematic diagram of the cross-sectional connection structure of the hollow tube and the transmission cylinder of the present invention.

[0030] In the figure: 1. base; 2. support base; 3. display cabinet; 4. transparent cover; 5. liquid storage box; 6. liquid exchange tube; 7. piston plate; 8. spring 1; 9. push block; 10. mounting base; 11. display block; 12. double-axis motor; 13. bevel gear 1; 14. shaft rod seat; 15. linkage vertical rod; 16. bevel gear 2; 17. bevel gear 3; 18. linkage horizontal rod; 19. bevel gear 4; 20. disc; 21. arc-shaped block; 22. display cavity; 23. transmission roller; 24. transmission Moving cylinder; 25. Display belt; 26. Piston strip; 27. Inner wiping strip; 28. Fixed block; 29. ​​Outer wiping strip; 30. Towing rope; 31. L-shaped hook one; 32. L-shaped hook two; 33. Hollow tube; 34. Air cavity one; 35. Piston plate; 36. Push column; 37. Arc-shaped abutment plate; 38. Ventilation hose; 39. Inflatable box; 40. Air cavity two; 41. Piston block; 42. Spring two; 43. Air groove; 44. Elastic pressure rod; 45. Swivel; 46. Arc notch. DETAILED DESCRIPTION

[0031] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. Example

[0032] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, a construction cost progress management device is provided, including a base 1, a support base 2 is symmetrically fixedly connected to the upper surface of the base 1, a display cabinet 3 is fixedly connected to the top of the two support bases 2, a plurality of transparent covers 4 are installed on the front surface of the display cabinet 3 by being disassembled by bolts, a plurality of liquid storage boxes 5 are fixedly connected to the front of the lower surface of the base 1, a liquid replacement tube 6 is fixedly connected between the liquid storage box 5 and the transparent cover 4, a piston plate 7 is slidably connected to the inside of the liquid storage box 5, a spring 8 is fixedly connected between the piston plate 7 and the liquid storage box 5, a push block 9 is fixedly connected to the rear surface of the piston plate 7, a mounting seat 10 is symmetrically fixedly connected to the upper surface of the display cabinet 3, a display block 11 is rotatably connected between the two display cabinets 3 through a rotating shaft, a dual-axis motor 12 is fixedly connected to the right side of the mounting seat 10 located on the left side of the upper surface of the display cabinet 3, and the right end of the output shaft of the dual-axis motor 12 is fixedly connected to the left side of the display block 11;

[0033] The liquid storage box 5 and the push block 9 are sealed, and the dual-axis motor 12 is started to control the display block 11 to rotate and change the display surface, so that the names of different items can be displayed. The display cabinet 3 is used to display different sub-item contents. The transparent cover 4 is used to protect the display contents of the display cabinet 3 from dust. In addition, dark color pigments can be stored inside the liquid storage box 5, so that under normal conditions, under the push of the spring 8, the piston plate 7 will fill the liquid inside the liquid storage box 5 into the transparent cover 4, and cover the transparent cover 4, so that the sub-item contents corresponding to the items not displayed on the display block 11 are covered, and only the sub-item contents corresponding to the items displayed on the display block 11 are displayed separately;

[0034] The left end of the output shaft of the dual-axis motor 12 is fixedly connected with a bevel gear 13, and the left side of the display cabinet 3 is fixedly connected with a shaft seat 14. The interior of the shaft seat 14 is rotatably connected with a linkage vertical rod 15 through a rotating shaft. The top and bottom ends of the linkage vertical rod 15 are respectively fixedly connected with a bevel gear 2 16 and a bevel gear 3 17. The bevel gear 2 16 is meshed with the bevel gear 13. A linkage cross bar 18 is rotatably connected between the two support seats 2 through a rotating shaft. The left end of the linkage cross bar 18 is fixedly connected with a bevel gear 4 19. The bevel gear 3 17 is meshed with the bevel gear 4 19. The outer side wall of the linkage cross bar 18 is located behind a plurality of push blocks 9 and is fixedly connected with a disc 20. The outer side wall of the disc 20 is integrally formed with an arc-shaped stop block 21.

[0035] The dual-axis motor 12 starts to control the display block 11 to rotate. When the display surface is changed, the linkage cross bar 18 can be controlled to rotate under the meshing transmission of multiple gears, so that the pushed blocks 9 can be squeezed in turn through the arc-shaped resistance blocks 21, so that the piston plate 7 moves forward. At this time, the liquid inside the transparent cover 4 used to cover the content can be extracted into the liquid storage box 5, so that the transparent cover 4 at this position can view the sub-item display content.

[0036] like Figure 3 and Figure 4 As shown, a plurality of display chambers 22 are provided inside the display cabinet 3, and a plurality of transmission rollers 23 and a transmission cylinder 24 are rotatably connected inside the display chamber 22 through a rotating shaft, and a display belt 25 is commonly connected to the transmission rollers 23 and the transmission cylinder 24 inside the same display chamber 22;

[0037] The transmission roller 23, the transmission cylinder 24 and the display belt 25 form a mechanism that can change the display surface through transmission, so that the display belt 25 can change different display surfaces through transmission, thereby facilitating the writing of the contents of the sub-items on the display belt 25 for separate display.

[0038] like Figure 5As shown, the transparent cover 4 is a hollow rectangular parallelepiped structure with an opening on the upper surface, a piston strip 26 is slidably connected inside the transparent cover 4, an inner wiping strip 27 is fixedly connected to the upper surface of the piston strip 26, fixed blocks 28 are fixedly connected to both sides of the upper surface of the transparent cover 4, an outer wiping strip 29 is slidably connected below the outer side wall of the transparent cover 4, two traction ropes 30 are fixedly connected to the upper surface of the outer wiping strip 29, the top end of the traction rope 30 passes through the fixed block 28 and is fixedly connected to the upper surface of the piston strip 26;

[0039] When the liquid inside the transparent cover 4 is extracted, the piston bar 26 will descend along the inside of the transparent cover 4, and the inner wiping bar 27 can wipe the inside of the transparent cover 4 to prevent the residual part of the shielding liquid from affecting people's viewing of the display content on the display belt 25 through the transparent cover 4. At the same time, the outer wiping bar 29 will rise along the outer side of the transparent cover 4 under the pull of the traction rope 30 to wipe the surface of the transparent cover 4 to avoid dust and other problems that affect viewing;

[0040] The front surface of the fixed block 28 is fixedly connected with an L-shaped hook 1 31, and the front surface of the outer wiping strip 29 is fixedly connected with two L-shaped hooks 2 32;

[0041] An elastic member for resetting is conveniently hung between the two L-shaped hooks 32 facing each other, so that when the inner wiping strip 27 rises along the inside of the transparent cover 4, the outer wiping strip 29 is pulled down along the transparent cover 4 to be reset with the assistance of the elastic member.

[0042] like Fig. 9 As shown, a hollow tube 33 is commonly provided inside the multiple transmission cylinders 24, and the hollow tube 33 is rotatably connected to the display cabinet 3 through a rotating shaft. An air cavity 34 is opened inside the hollow tube 33, and a piston plate 35 is slidably connected inside the air cavity 34. A push column 36 is fixedly connected to the upper surface of the piston plate 35. The tops of two adjacent push columns 36 are commonly fixedly connected with an arc-shaped abutment plate 37. The bottoms of the multiple air cavities 34 are located inside the hollow tube 33 and are fixedly connected with a ventilation hose 38.

[0043] The push column 36 is sealed with the air cavity 34, and air is pumped into the corresponding air cavity 34 through a ventilation hose 38, so that the arc-shaped abutment piece 37 can be controlled to press against the transmission cylinder 24. At this time, by rotating the hollow tube 33, a transmission cylinder 24 can be controlled to rotate, and the display belt 25 at this location can be controlled to rotate for display.

[0044] like Figure 8As shown, an air-filling box 39 is fixedly connected between the two support seats 2, and a plurality of air cavities 40 are provided inside the air-filling box 39, and a piston block 41 is slidably connected inside the air cavity 40, and a plurality of springs 42 are fixedly connected between the piston block 41 and the air cavity 40, and a plurality of air grooves 43 are integrally formed on the rear surface of the air cavity 40 located inside the air-filling box 39, and the plurality of air grooves 43 are fixedly connected to the opposite ends of the plurality of ventilation hoses 38, and the front surfaces of the plurality of piston blocks 41 are located behind the plurality of discs 20 and are fixedly connected to elastic pressure rods 44, and an arc notch 46 is integrally formed on the outer wall of the disc 20, and the arc notch 46 is adapted to the elastic pressure rod 44;

[0045] When the arc-shaped stop block 21 on the disc 20 abuts against the push block 9, the elastic pressure rod 44 at this position will move to the inner side of the arc notch 46 opened on the disc 20, so that the piston block 41 moves forward, so that the air cavity 2 40 at this location draws out the internal gas of the corresponding air cavity 1 34 through the ventilation hose 38, thereby controlling the arc-shaped stop block 21 to abut against the inner side of the transmission cylinder 24, so that when the hollow tube 33 rotates, a single transmission cylinder 24 can be controlled to rotate.

[0046] like Figure 1 As shown, the right end of the hollow tube 33 passes through the right side of the display cabinet 3, and a swivel 45 is fixedly connected to the outside of the plurality of ventilation hoses 38;

[0047] It is convenient to hold and then rotate the hollow tube 33.

[0048] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A construction cost progress management device, comprising a base (1), characterized in that: The upper surface of the base (1) is symmetrically fixedly connected to a support base (2), the tops of the two support bases (2) are fixedly connected to a display cabinet (3), the front surface of the display cabinet (3) is installed with a plurality of transparent covers (4) by means of bolts, a plurality of liquid storage boxes (5) are fixedly connected to the front of the lower surface of the base (1), a liquid replacement tube (6) is fixedly connected between the liquid storage boxes (5) and the transparent covers (4), a piston plate (7) is slidably connected inside the liquid storage box (5), a spring (8) is fixedly connected between the piston plate (7) and the liquid storage box (5), and a push block (9) is fixedly connected to the rear surface of the piston plate (7); The upper surface of the display cabinet (3) is symmetrically fixedly connected with a mounting seat (10); a display block (11) is rotatably connected between the two display cabinets (3) via a rotating shaft; a double-axis motor (12) is fixedly connected to the right side of the mounting seat (10) located on the left side of the upper surface of the display cabinet (3); and the right end of the output shaft of the double-axis motor (12) is fixedly connected to the left side of the display block (11); The left end of the output shaft of the dual-axis motor (12) is fixedly connected to a bevel gear 1 (13), the left side of the display cabinet (3) is fixedly connected to a shaft seat (14), the interior of the shaft seat (14) is rotatably connected to a linkage vertical rod (15) via a rotating shaft, the top and bottom ends of the linkage vertical rod (15) are respectively fixedly connected to a bevel gear 2 (16) and a bevel gear 3 (17), the bevel gear 2 (16) is meshingly connected to the bevel gear 1 (13), a linkage cross rod (18) is rotatably connected between the two support seats (2) via a rotating shaft, the left end of the linkage cross rod (18) is fixedly connected to a bevel gear 4 (19), the bevel gear 3 (17) is meshingly connected to the bevel gear 4 (19), the outer side wall of the linkage cross rod (18) is located behind the plurality of push blocks (9) and is fixedly connected to a disk (20), the outer side wall of the disk (20) is integrally formed with an arc-shaped stop block (21).

2. A construction cost progress management device according to claim 1, characterized in that: A plurality of display chambers (22) are provided inside the display cabinet (3), a plurality of transmission rollers (23) and a transmission cylinder (24) are rotatably connected inside the display chamber (22) via a rotating shaft, and a display belt (25) is commonly transmission-connected between the plurality of transmission rollers (23) and the transmission cylinder (24) inside the same display chamber (22).

3. The construction cost progress management device according to claim 1, characterized in that: The transparent cover (4) is a hollow rectangular parallelepiped structure with an opening on the upper surface. A piston strip (26) is slidably connected to the interior of the transparent cover (4). An inner wiping strip (27) is fixedly connected to the upper surface of the piston strip (26). Fixed blocks (28) are fixedly connected to both sides of the upper surface of the transparent cover (4). An outer wiping strip (29) is slidably connected to the lower side of the outer wall of the transparent cover (4). Two traction ropes (30) are fixedly connected to the upper surface of the outer wiping strip (29). The top ends of the traction ropes (30) pass through the fixed blocks (28) and are fixedly connected to the upper surface of the piston strip (26).

4. A construction cost progress management device according to claim 3, characterized in that: An L-shaped hook 1 (31) is fixedly connected to the front surface of the fixing block (28), and two L-shaped hooks 2 (32) are fixedly connected to the front surface of the outer wiping strip (29).

5. The construction cost progress management device according to claim 2, characterized in that: A hollow tube (33) is commonly provided inside the plurality of transmission cylinders (24); the hollow tube (33) is rotatably connected to the display cabinet (3) via a rotating shaft; an air cavity (34) is provided inside the hollow tube (33) located inside the plurality of transmission cylinders (24); a piston plate (35) is slidably connected inside the air cavity (34); a push column (36) is fixedly connected to the upper surface of the piston plate (35); and an arc-shaped abutment plate (37) is commonly fixedly connected to the top ends of two adjacent push columns (36).

6. A construction cost progress management device according to claim 5, characterized in that: The bottoms of the plurality of air cavities (34) are located inside the hollow tube (33) and are all fixedly connected to a ventilation hose (38).

7. A construction cost progress management device according to claim 6, characterized in that: An air filling box (39) is fixedly connected between the two support seats (2), a plurality of air chambers (40) are provided inside the air filling box (39), a piston block (41) is slidably connected inside the air chamber (40), a plurality of springs (42) are fixedly connected between the piston block (41) and the air chamber (40), a plurality of air grooves (43) are integrally formed on the rear surface of the air chamber (40) located inside the air filling box (39), the plurality of air grooves (43) are fixedly connected to the opposite ends of the plurality of ventilation hoses (38), and the front surfaces of the plurality of piston blocks (41) are fixedly connected to elastic pressure rods (44) located behind the plurality of discs (20).

8. The construction cost progress management device according to claim 6, characterized in that: The right end of the hollow tube (33) passes through the right side of the display cabinet (3) and is fixedly connected to a swivel (45) located outside the plurality of ventilation hoses (38).

9. A construction cost progress management device according to claim 7, characterized in that: An arc notch (46) is integrally formed on the outer side wall of the circular disk (20), and the arc notch (46) is adapted to fit the elastic pressure-bearing rod (44).

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