Spliced liquid crystal display screen

Abstract

The utility model relates to the technical field of liquid crystal display screens, in particular to a spliced liquid crystal display screen which comprises a fixing frame and a hollow shell, a guide rail is fixedly connected to the front end face of the fixing frame, a display screen body is connected to the front side of the guide rail in a sliding mode, and bolt reserved holes are formed in the left side and the right side in the fixing frame. Fixing plates are fixedly connected to the left and right end faces of the hollow shell, an inner gear is rotatably connected to the middle of the top of the hollow shell, an outer gear is slidably connected to the inner side of the inner gear, and an external motor is fixedly connected to the top end of the outer gear; through design cooperation, when the device is used for splicing the display screen bodies, the distance between the fixing frames for fixing the display screen bodies can be adjusted through the external motor, and the situation that the display screen bodies cannot be spliced due to the fact that the positions of the fixing frames are not matched when the fixing frames are installed on a wall can be avoided; and the error-tolerant rate of mounting the fixing frame by an operator is increased to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display screens, in particular to a spliced ​​liquid crystal display screen. Background Art

[0002] Liquid crystal display is a display technology widely used in electronic devices. It uses the properties of liquid crystal materials to control the ability of light to pass through the screen to display images;

[0003] After checking, the disclosure (announcement) number: CN218241239U discloses a spliced ​​liquid crystal display screen. This technology discloses "a spliced ​​liquid crystal display screen, including a first liquid crystal display screen, the left side of the upper surface of the first liquid crystal display screen is fixedly connected with a connecting mechanism. This spliced ​​liquid crystal display screen, through the use of the connecting mechanism, when the spliced ​​liquid crystal display screen is installed, firstly, the first sliding groove inside the fixed frame is used to drive the sliding of the first sliding block, and the first sliding block drives the expansion and contraction of the reset spring to move the sliding connecting plate to the corresponding position, and then the sliding connecting plate is connected to the connecting block in the second liquid crystal display screen through the connecting groove inside the sliding connecting plate, and the first liquid crystal display screen and the second liquid crystal display screen are connected by the fixing effect of the C-type plates on both sides of the receiving block and the threaded rods movably connected to the front of the C-type plates. The use of this structure achieves the effect of convenient connection, and the connection structure will not be exposed to the outside, which improves the appearance and avoids the problem that the existing structure cannot be stably connected".

[0004] When installing an existing LCD screen, it is necessary to measure the length and installation position of the LCD screen on the wall. After the measurement and marking, the fixing frame for fixing the LCD screen can be fixed to the wall. The fixing frame is generally fixed to the wall by expansion bolts. However, when installing the fixing frame, an unexpected situation of displacement of the installation position may occur. In particular, when the fixing frame is not installed, the LCD screen and the fixing frame cannot be spliced, which easily leads to instability of the fixing frame. The LCD screen and the fixing frame fall off the wall. At this time, the expansion bolts need to be removed from the wall to adjust the position of the fixing frame. After adjusting the fixing frame, the expansion bolts are nailed into the wall. It is difficult to adjust, and the holes left by drilling the expansion bolts into the wall affect the aesthetics of the wall.

[0005] In order to solve the above problems, this application proposes a spliced ​​liquid crystal display screen. Utility Model Content

[0006] In order to solve the problems raised in the above background technology, the utility model provides a spliced ​​liquid crystal display screen, which has the characteristic of being able to quickly adjust the positions between the fixing frames before installing the fixing frames.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a spliced ​​liquid crystal display screen, including a fixing frame and a hollow shell, the front end surface of the fixing frame is fixedly connected to a guide rail, the front side of the guide rail is slidably connected to a display screen body, the left and right sides of the inside of the fixing frame are provided with bolt reserved holes, the left and right end surfaces of the hollow shell are fixedly connected to fixing plates, the middle of the top of the hollow shell is rotatably connected to an internal gear, the inner side of the internal gear is slidably connected to an external gear, the top of the external gear is fixedly connected to an external motor, the bottom of the internal gear is fixedly connected to a first bevel gear, and the lower right side of the first bevel gear is meshed There is a second bevel gear, the right end face of the second bevel gear is fixedly connected to the first transmission wheel, the right end face of the first transmission wheel is rotatably connected to the first limit seat, the first transmission wheel is internally spirally connected to a top threaded rod, a transmission belt is provided on the outside of the first transmission wheel, a second transmission wheel is provided on the lower inner side of the transmission belt, the right end face of the second transmission wheel is rotatably connected to the second limit seat, the inner walls of the first transmission wheel and the second transmission wheel are both provided with internal threads, the second transmission wheel is internally spirally connected to a bottom threaded rod, and the left top end of the bottom threaded rod and the right top end of the top threaded rod are both rotatably connected to a limiting block.

[0008] As a preferred spliced ​​liquid crystal display screen of the utility model, the top of the first bevel gear is rotatably connected to the middle of the upper interior of the hollow shell, the right end faces of the first limit seat and the second limit seat are fixedly connected to the upper right side of the hollow shell, the upper left and right sides of the hollow shell are rotatably connected to the outer side of the top threaded rod, the upper right end face of the fixing frame contacts the left end face of the limit block on the right end face of the top threaded rod, the lower left and right sides of the hollow shell are rotatably connected to the outer side of the bottom threaded rod, and the lower left end face of the fixing frame contacts the right end face of the limit block on the left end face of the bottom threaded rod. When the display screen body is spliced, the fixing frame used to fix the display screen body can adjust the distance between the fixing frames by an external motor.

[0009] As a preferred spliced ​​LCD display screen of the utility model, the guide rail is fixed on the front side of the fixing frame in a vertical manner as a whole, a slider is provided on the rear end face of the display screen body, and the slider is longitudinally inserted into the outside of the guide rail and slides up and down, so that the display screen body can contact the guide rail from top to bottom and be limited on the outside of the guide rail.

[0010] As a preferred spliced ​​LCD display screen of the utility model, a bolt reserved hole which is the same as that in the fixing frame is opened in the middle of the fixing plate, and the rear end face of the fixing plate is parallel to the rear end face of the fixing frame. Before installing the fixing frame, the hollow shell can be pre-installed on the wall surface, and after adjusting the fixing frame, the fixing frame can be connected to the wall with bolts.

[0011] As a preferred spliced ​​liquid crystal display screen of the utility model, a groove is opened from top to bottom in the middle of the inner end surface of the fixing frame, and the longitudinal length of the groove on the inner end surface of the fixing frame matches the distance between the bottom threaded rod and the top threaded rod, the top threaded rod is inserted into the inside of the right fixing frame and fixed by a limit block, and the bottom threaded rod is inserted into the inside of the left fixing frame and fixed by a limit block, the longitudinal section diameter of the limit block is one and a half times larger than the longitudinal section diameter of the top threaded rod and the bottom threaded rod, and the internal gear can be driven to rotate by an external motor, and the first bevel gear under the internal gear drives the second bevel gear, the first transmission wheel and the second transmission wheel inside the hollow shell to rotate simultaneously, so that the top threaded rod and the bottom threaded rod drive the fixing frames on both sides to slide.

[0012] As a preferred spliced ​​liquid crystal display screen of the utility model, a connecting rod is arranged between the first bevel gear and the first bevel gear, a circular hole is opened in the middle of the upper part of the hollow shell, and the diameter of the circular hole in the middle of the upper part of the hollow shell matches the cross-sectional diameter of the connecting rod, so that the internal gear drives the first bevel gear to rotate, so that the top threaded rod and the bottom threaded rod can rotate even if the external motor is not in the hollow shell.

[0013] As a preferred spliced ​​liquid crystal display screen of the utility model, a rotation groove is opened inside the first limit seat and the second limit seat, and the top end of the right side of the first transmission wheel and the second transmission wheel rotates and limits inside the rotation groove, the internal threads inside the first transmission wheel and the second transmission wheel contact and spiral with the external threads on the outside of the top threaded rod and the bottom threaded rod, and the first limit seat and the second limit seat allow the first transmission wheel and the second transmission wheel to rotate in the hollow shell while limiting their positions, avoiding the situation where the first transmission wheel and the second transmission wheel cannot be fixed and cannot rotate to drive the top threaded rod and the bottom threaded rod to move.

[0014] The utility model has the following beneficial effects:

[0015] The spliced ​​liquid crystal display screen designed by the utility model is designed so that when the device splices the display screen body, the fixing frame used to fix the display screen body can adjust the distance between the fixing frames through an external motor, which can avoid the situation where the display screen bodies cannot be spliced ​​due to position mismatch when the fixing frame is installed on the wall, thereby increasing the fault tolerance rate of the operator in installing the fixing frame to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the exploded structure of the hollow shell section of the utility model;

[0019] Figure 3 It is a schematic diagram of the vertical cross-section of the three-dimensional structure of the first transmission wheel of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the longitudinal section of the hollow shell of the utility model and is rotated 90 degrees horizontally.

[0021] Legend:

[0022] 1. Fixing frame; 2. Guide rail; 3. Display screen body; 4. Bolt reserved hole; 5. Hollow shell; 6. Internal gear; 7. External gear; 8. External motor; 9. Bottom threaded rod; 10. Limit block; 11. Fixing plate; 12. First bevel gear; 13. Second bevel gear; 14. First transmission wheel; 15. Top threaded rod; 16. Transmission belt; 17. Second transmission wheel; 18. Internal thread; 19. First limit seat; 20. Second limit seat. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example 1

[0025] like Figure 1-Figure 4 As shown;

[0026] A spliced ​​liquid crystal display screen comprises a fixing frame 1 and a hollow shell 5.

[0027] In this embodiment: after checking the public (announcement) number: CN218241239U discloses a spliced ​​liquid crystal display screen, and this technology discloses "a spliced ​​liquid crystal display screen, including a first liquid crystal display screen, the left side of the upper surface of the first liquid crystal display screen is fixedly connected with a connecting mechanism. This spliced ​​liquid crystal display screen, through the use of the connecting mechanism, when the spliced ​​liquid crystal display screen is installed, first the first sliding groove inside the fixed frame drives the sliding of the first sliding block, and the first sliding block drives the expansion and contraction of the reset spring to move the sliding connecting plate to the corresponding position, and then the sliding connecting plate is connected to the connecting block in the second liquid crystal display screen through the connecting groove inside the sliding connecting plate, and the first liquid crystal display screen and the second liquid crystal display screen are connected by the fixing effect of the C-type plates on both sides of the receiving block and the threaded rods movably connected to the front of the C-type plates. The use of this structure achieves the effect of convenient connection, and the connection structure will not be exposed to the outside, which improves the appearance and avoids the problem that the existing structure cannot be stably connected".

[0028] When installing an existing LCD screen, it is necessary to measure the length and installation position of the LCD screen on the wall. After the measurement and marking, the fixing frame for fixing the LCD screen can be fixed to the wall. The fixing frame is generally fixed to the wall by expansion bolts. However, when installing the fixing frame, an unexpected situation of displacement of the installation position may occur. In particular, the LCD screen and the fixing frame cannot be spliced ​​when the fixing frame is not installed, which can easily lead to instability of the fixing frame. The LCD screen and the fixing frame fall off the wall. At this time, to adjust the position of the fixing frame, it is necessary to remove the expansion bolts from the wall, and then nail the expansion bolts into the wall after adjusting the fixing frame. It is difficult to adjust, and the holes left by the expansion bolts drilled into the wall affect the aesthetics of the wall. Combined with actual use, this problem is obviously a real problem that exists and is relatively difficult to solve. In view of this, in order to solve this technical problem, a first transmission wheel and a second transmission wheel are added to the application document.

[0029] According to the above content, in order to be able to quickly adjust the position between the fixing frames 1 before installing the fixing frames 1, it also includes a fixing frame 1 and a hollow shell 5, the front end face of the fixing frame 1 is welded with a guide rail 2, the front side of the guide rail 2 is inserted and slid by the rear end face of the display screen body 3, bolt reserved holes 4 are opened on the left and right sides of the fixing frame 1, and fixing plates 11 are welded on the left and right end faces of the hollow shell 5. A rotatable internal gear 6 is arranged in the middle of the top of the hollow shell 5, the inner side of the internal gear 6 is inserted by the external gear 7 and meshes with each other, and the top of the external gear 7 is penetrated and welded and fixed by the output shaft of the external motor 8, and the first bevel gear 12 is welded at the bottom of the internal gear 6. The right side below the first bevel gear 12 is meshed with the second bevel gear 13, and the first transmission wheel 14 is welded on the right end face of the second bevel gear 13. The right end face of the first transmission wheel 14 enters the first limit seat 19 and rotates, the top threaded rod 15 penetrates and spirals inside the first transmission wheel 14, and a transmission belt 16 is arranged on the outside of the first transmission wheel 14 A second transmission wheel 17 is arranged at the lower inner side of the transmission belt 16, and the right end face of the second transmission wheel 17 enters the second limiting seat 20 and rotates. The inner walls of the first transmission wheel 14 and the second transmission wheel 17 are both provided with internal threads 18, and the bottom threaded rod 9 penetrates and spirals inside the second transmission wheel 17. The top left side of the bottom threaded rod 9 and the top right side of the top threaded rod 15 are both connected to the limiting block 10 through a bearing. The top of the first bevel gear 12 is rotatably connected to the middle of the upper upper part of the hollow shell 5, and the right end faces of the first limiting seat 19 and the second limiting seat 20 are fixedly connected to the upper right side of the hollow shell 5, and the upper left and right sides of the hollow shell 5 are rotatably connected to the outer side of the top threaded rod 15, and the upper right end face of the fixing frame 1 contacts the left end face of the limiting block 10 on the right end face of the top threaded rod 15, and the lower left and right sides of the hollow shell 5 are rotatably connected to the outer side of the bottom threaded rod 9, and the lower left end face of the fixing frame 1 contacts the right end face of the limiting block 10 on the left end face of the bottom threaded rod 9.

[0030] In this embodiment, when the display screen bodies 3 are spliced, the fixing frames 1 for fixing the display screen bodies 3 can adjust the distance between the fixing frames 1 through the external motor 8 .

[0031] In an optional embodiment: the guide rail 2 is fixed to the front side of the fixing frame 1 in an overall vertical manner, a slider is provided on the rear end surface of the display screen body 3, and the slider is longitudinally inserted into the outer side of the guide rail 2 and slides up and down.

[0032] In this embodiment, the display screen body 3 can be brought into contact with the guide rail 2 from top to bottom, and can be limited at the outer side of the guide rail 2 .

[0033] In an optional embodiment: a bolt pre-set hole 4 which is the same as that in the fixing frame 1 is opened in the middle of the fixing plate 11 , and the rear end surface of the fixing plate 11 is parallel to the rear end surface of the fixing frame 1 .

[0034] In this embodiment: before installing the fixing frame 1 , the hollow shell 5 can be pre-installed on the wall surface, and after adjusting the fixing frame 1 , the fixing frame 1 can be connected to the wall using bolts.

[0035] In an optional embodiment: a groove is opened from top to bottom in the middle of the inner end surface of the fixing frame 1, and the longitudinal length of the groove on the inner end surface of the fixing frame 1 matches the distance between the bottom threaded rod 9 and the top threaded rod 15, the top threaded rod 15 is inserted into the right fixing frame 1 and fixed by the limit block 10, and the bottom threaded rod 9 is inserted into the left fixing frame 1 and fixed by the limit block 10, and the longitudinal section diameter of the limit block 10 is 1.5 times larger than the longitudinal section diameter of the top threaded rod 15 and the bottom threaded rod 9.

[0036] In this embodiment: the internal gear 6 can be driven to rotate by the external motor 8, and the first bevel gear 12 below the internal gear 6 drives the second bevel gear 13, the first transmission wheel 14 and the second transmission wheel 17 inside the hollow shell 5 to rotate simultaneously, so that the top threaded rod 15 and the bottom threaded rod 9 drive the fixed frames 1 on both sides to slide.

[0037] In an optional embodiment: a connecting rod is arranged between the first bevel gears 12 and the first bevel gears 12, a circular hole is opened in the middle of the upper part of the hollow shell 5, and the diameter of the circular hole in the middle of the upper part of the hollow shell 5 matches the cross-sectional diameter of the connecting rod.

[0038] In this embodiment, the internal gear 6 drives the first bevel gear 12 to rotate, so that the external motor 8 is not located in the hollow shell 5 and the top threaded rod 15 and the bottom threaded rod 9 can also rotate.

[0039] In an optional embodiment: a rotation groove is opened inside the first limit seat 19 and the second limit seat 20, and the top right side of the first transmission wheel 14 and the second transmission wheel 17 rotates and limits inside the rotation groove, and the internal thread 18 inside the first transmission wheel 14 and the second transmission wheel 17 contacts and spirals with the external thread on the outside of the top threaded rod 15 and the bottom threaded rod 9.

[0040] In this embodiment, it is a prerequisite to avoid the situation that the first transmission wheel 14 and the second transmission wheel 17 cannot be fixed and cannot rotate to drive the top threaded rod 15 and the bottom threaded rod 9 to move.

[0041] The working principle and use process of the utility model are as follows: when in use, the hollow shell 5 is fixed in the set area of ​​the wall, and after the expansion bolts are passed through the bolt reserved holes 4 inside the fixing plate 11, the expansion bolts enter the wall to fix the hollow shell 5 in the wall. At this time, the distance between the fixing frames 1 on the left and right sides of the hollow shell 5 is relatively far, and the operator can insert the back of the display screen into the outside of the guide rail 2 on the front side of the fixing frame 1, and then insert the external gear 7 at the output end of the external motor 8 into the internal gear 6 at the top of the hollow shell 5, start the external motor 8, and the external motor 8 drives the external gear 7 and the internal gear 6 meshed on the outside of the external gear 7 to rotate together, and the internal gear 6 drives the first bevel gear 12 on the top of the hollow shell 5 to rotate together, and the second bevel gear 13 meshed below the first bevel gear 12 drives the first transmission wheel 14 on the right end face and rotates in the first limit seat 19, and a transmission belt 16 is arranged on the outside of the first transmission wheel 14, and the transmission belt 16 drives the second transmission wheel 17 below to rotate together in the second limit seat 20 The inner side rotates, at this time, the internal threads 18 inside the first transmission wheel 14 and the second transmission wheel 17 respectively drive the top threaded rod 15 and the bottom threaded rod 9 to rotate, and the top threaded rod 15 and the bottom threaded rod 9 move in the opposite direction while rotating due to the characteristics of the internal threads 18. At this time, the limit block 10 at the top right side of the top threaded rod 15 and the limit block 10 at the top left side of the bottom threaded rod 9 respectively drive the fixing frames 1 on both sides to move toward the position of the hollow shell 5. At this time, the fixing frame 1 drives the display screen body 3 to slide toward the inner center through the guide rail 2 until the inner end surfaces of the display screen bodies 3 on the left and right sides contact each other and then stop the external motor 8. At this time, the position of the fixing frame 1 is determined, and the display screen body 3 can be removed from the guide rail 2, and the expansion bolts are passed through the bolt reserved holes 4 inside the fixing frame 1, and inserted into the wall at the rear end face of the fixing frame 1. After the fixing frame 1 is installed, the external motor 8 is taken out from the top of the hollow shell 5, and the display screen body 3 is reinstalled on the outside of the guide rail 2.

[0042] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spliced ​​liquid crystal display screen, comprising a fixing frame (1) and a hollow shell (5), characterized in that: The front end surface of the fixing frame (1) is fixedly connected to a guide rail (2), and the front side of the guide rail (2) is slidably connected to a display screen body (3). Bolt reserved holes (4) are provided on both left and right sides of the fixing frame (1). The left and right end surfaces of the hollow shell (5) are fixedly connected to fixing plates (11). The middle of the top of the hollow shell (5) is rotatably connected to an internal gear (6), and the inner side of the internal gear (6) is slidably connected to an external gear (7). The top of the external gear (7) is fixedly connected to an external motor (8). The bottom of the internal gear (6) is fixedly connected to a first bevel gear (12), and a second bevel gear (13) is meshed on the right side below the first bevel gear (12). The right end surface of the second bevel gear (13) is fixedly connected to a first transmission wheel ( 14), the first transmission wheel (14) is rotatably connected to a first limit seat (19) at its right end face, the first transmission wheel (14) is internally spirally connected to a top threaded rod (15), a transmission belt (16) is arranged on the outside of the first transmission wheel (14), a second transmission wheel (17) is arranged on the inner side and below of the transmission belt (16), the second transmission wheel (17) is rotatably connected to a second limit seat (20), the first transmission wheel (14) and the second transmission wheel (17) are both provided with internal threads (18) on their inner walls, the second transmission wheel (17) is internally spirally connected to a bottom threaded rod (9), the left top end of the bottom threaded rod (9) and the right top end of the top threaded rod (15) are both rotatably connected to a limit block (10).

2. A spliced ​​liquid crystal display screen according to claim 1, characterized in that: The top of the first bevel gear (12) is rotatably connected to the middle of the upper part of the hollow shell (5); the right end faces of the first limit seat (19) and the second limit seat (20) are fixedly connected to the upper right part of the hollow shell (5); the upper left and right sides of the hollow shell (5) are rotatably connected to the outer side of the top threaded rod (15); the upper right end face of the fixing frame (1) contacts the left end face of the limit block (10) on the right end face of the top threaded rod (15); the lower left and right sides of the hollow shell (5) are rotatably connected to the outer side of the bottom threaded rod (9); the lower left end face of the fixing frame (1) contacts the right end face of the limit block (10) on the left end face of the bottom threaded rod (9).

3. The spliced ​​liquid crystal display screen according to claim 1, characterized in that: The guide rail (2) is fixed on the front side of the fixing frame (1) in a vertical manner as a whole, and a slider is provided on the rear end surface of the display screen body (3), and the slider is longitudinally inserted into the outside of the guide rail (2) and slides up and down.

4. The spliced ​​liquid crystal display screen according to claim 1, characterized in that: The fixing plate (11) has a bolt pre-set hole (4) in the middle thereof which is the same as that in the fixing frame (1), and the rear end surface of the fixing plate (11) is parallel to the rear end surface of the fixing frame (1).

5. The spliced ​​liquid crystal display screen according to claim 1, characterized in that: A groove extending from top to bottom is provided in the middle of the inner end surface of the fixing frame (1), and the longitudinal length of the groove on the inner end surface of the fixing frame (1) matches the distance between the bottom threaded rod (9) and the top threaded rod (15). The top threaded rod (15) is inserted into the inside of the right fixing frame (1) and fixed by a stop block (10), and the bottom threaded rod (9) is inserted into the inside of the left fixing frame (1) and fixed by a stop block (10). The longitudinal section diameter of the stop block (10) is one and a half times larger than the longitudinal section diameters of the top threaded rod (15) and the bottom threaded rod (9).

6. The spliced ​​liquid crystal display screen according to claim 1, characterized in that: A connecting rod is arranged between the first bevel gear (12) and the first bevel gear (12), and a circular hole is opened in the middle of the upper part of the hollow shell (5), and the diameter of the circular hole in the middle of the upper part of the hollow shell (5) matches the cross-sectional diameter of the connecting rod.

7. The spliced ​​liquid crystal display screen according to claim 1, characterized in that: A rotation groove is provided inside the first limiting seat (19) and the second limiting seat (20), and the top ends of the right sides of the first transmission wheel (14) and the second transmission wheel (17) rotate and limit inside the rotation groove, and the internal threads (18) inside the first transmission wheel (14) and the second transmission wheel (17) contact and spiral with the external threads on the outer sides of the top threaded rod (15) and the bottom threaded rod (9).

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