All-in-one base

By introducing a steel plate fixing structure and a limiting block into the all-in-one base, the problem of deformation of the wiring board and plastic plate is solved, achieving stable connection and accurate positioning.

CN223757710UActive Publication Date: 2026-01-02DONGGUAN HAIYI HARDWARE PLASTIC CO LTD
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Patent Information

Application Number
CN202520100728.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-01-16
Publication Date
2026-01-02
Estimated Expiration
2035-01-16

AI Technical Summary

Technical Problem

Existing multi-functional bases lack steel plate fixation, which makes the wiring board or plastic plate prone to deformation after long-term use, resulting in inaccurate positioning.

Method used

The terminal base is fixed by a first steel plate and a second steel plate, and the stability of the terminal block and the plastic plate is ensured by the cooperation of the fixing mechanism and the limit block. Stable connection is achieved by using threaded rod and gear meshing transmission.

Benefits of technology

The stability of the wiring base has been improved, deformation has been avoided, and the positioning accuracy and assembly accuracy of the device during use have been ensured.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the related technical field of wiring bases, and particularly relates to an all-in-one base which comprises a wiring board body, a first steel plate is installed at the upper end of the wiring board body, a first wiring base is installed at the upper end of the first steel plate, and the left end and the right end of the first wiring base are in lap joint with the left side and the right side of a first fixing mechanism respectively. According to the utility model, the wiring base I and the wiring base II are fixed through the first steel plate and the second steel plate, so that the stability of the wiring base I and the wiring base II in the use process can be ensured, and the poor stability of the wiring base I and the wiring base II in the use process is avoided; the situation that the device is inaccurate in positioning in the using process due to the fact that a wiring board body and a plastic board are prone to deformation is avoided, and a first wiring base and a second wiring base can be further fixed through mutual cooperation of a first fixing mechanism and a second fixing mechanism which are arranged.
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Description

TECHNICAL FIELD

[0001] The utility model belongs to the related technical field of wiring base, specifically relates to a multi -in -one base. BACKGROUND

[0002] Multi -in -one wiring base is a kind of electrical accessories, its design purpose is to provide a solution that can support multidirectional line, multi -in -one wiring base can be realized flexible installation and use under a variety of occasions.

[0003] Prior art problems:

[0004] The existing multi -in -one base mostly does not use steel plate to be fixed, and then lead to the deformation of wiring board or plastic plate arranged on multi -in -one base after long time use, to cause the inaccurate positioning problem of device in the process of use. Utility model content

[0005] The utility model discloses a multi -in -one base can solve the problem that the existing multi -in -one base mostly does not use steel plate to be fixed, and then lead to the deformation of wiring board or plastic plate arranged on multi -in -one base after long time use, to cause the inaccurate positioning problem of device in the process of use.

[0006] The technical scheme adopted by the utility model is as follows:

[0007] A kind of multi -in -one base, including wiring board main body, the upper end of the wiring board main body is equipped with first steel plate, the upper end of the first steel plate is equipped with wiring base one, the left and right ends of the wiring base one are respectively overlapped with the left and right sides of fixed mechanism one, the lower end of the fixed mechanism one is installed in the upper end of wiring board main body, the left side of the fixed mechanism one is fixedly connected with two fixed columns one;

[0008] The lower end of the wiring board main body is equipped with plastic plate, the lower end of the plastic plate is equipped with two second steel plates, the bottom of two second steel plates is equipped with wiring base two, the left and right ends of two wiring base two are respectively overlapped with the left and right sides of two fixed mechanism two, the upper end of two fixed mechanism two is installed in the lower end of plastic plate, the opposite side of two fixed mechanism two is fixedly connected with two fixed columns two.

[0009] The first steel plate is clamped with four positioning blocks one respectively through four positioning holes in it, the lower end of four positioning blocks one is fixedly connected with wiring board main body, two second steel plates are clamped with eight positioning blocks two respectively through four positioning holes in it, the upper end of eight positioning blocks two is fixedly connected with plastic plate.

[0010] The upper end of the plastic plate is fixedly connected with two limiting blocks, both of which are clamped with the terminal block body which is internally provided with two limiting grooves, the lower ends of both of the two fixed columns are fixedly connected with the terminal block body, and the upper ends of the four fixed columns two are fixedly connected with the plastic plate.

[0011] The fixing mechanism one comprises two sleeve shells one, the lower ends of both of the sleeve shells one are mounted on the upper end of the terminal block body, both of the sleeve shells one are movably connected with two gear wheels one through the fixed shaft one arranged in the sleeve shells one, and both of the gear wheels one are in meshing transmission with four toothed plates one.

[0012] The opposite distal ends of the four toothed plates one are fixedly connected with sliding connection plates one, the opposite distal ends of the four sliding connection plates one are fixedly connected with connection frames one, and the opposite distal ends of the four connection frames one pass through the left and right ends of the two sleeve shells one and are fixedly connected with two base clamping plates one.

[0013] The opposite proximal ends of the two base clamping plates one are overlapped with the left and right ends of the terminal base one, the left end of the base clamping plate one on the left side is fixedly connected with two push-pull rods one, the left ends of the two push-pull rods one pass through the right end of the shell one and are fixedly connected with a vertical plate one, the vertical plate one is threadedly connected with a threaded rod one through the threaded hole arranged in the vertical plate one, and the left and right sides of the threaded rod one are movably connected with the left and right ends of the shell one.

[0014] The lower end of the shell one is fixedly connected with the two fixed columns one, the vertical plate one is slidably connected with two limiting rods one through the limiting holes arranged in the vertical plate one, the left and right ends of the two limiting rods one are fixedly connected on the left and right sides inside the shell one, the upper and lower ends of the four sliding connection plates one are fixedly connected with sliding blocks one, and the eight sliding blocks one are movably connected inside the two sliding grooves one arranged on the upper and lower sides inside the two sleeve shells one.

[0015] Both of the fixing mechanism two comprise two sleeve shells two, the upper ends of the four sleeve shells two are mounted on the lower end of the plastic plate, the four sleeve shells two are movably connected with four gear wheels two through the fixed shaft two arranged in the sleeve shells two, the four gear wheels two are in meshing transmission with eight toothed plates two, the eight toothed plates two are fixedly connected with eight sliding connection plates two, the eight sliding connection plates two are divided into four groups, the opposite distal ends of which are fixedly connected with connection frames two, and the opposite distal ends of the eight connection frames two pass through the left and right ends of the four sleeve shells two and are fixedly connected with four base clamping plates two.

[0016] The relatively close ends of the four base clamps are respectively connected to the left and right ends of the two wiring bases. The relatively far ends of the two base clamps are fixedly connected to two push-pull rods. The relatively far ends of the four push-pull rods pass through the relatively close ends of the two housings and are respectively fixedly connected to two vertical plates. The two vertical plates are respectively threaded to two threaded rods through threaded holes opened inside them. The left and right sides of the two threaded rods are respectively movably connected to the left and right ends of the two housings.

[0017] The upper ends of the two housings are respectively fixedly connected to four fixed posts. The two vertical plates are slidably connected to four limiting rods through two limiting holes opened inside them. The left and right ends of the four limiting rods are respectively fixedly connected to the left and right sides inside the two housings. The upper and lower ends of the eight sliding connecting plates are fixedly connected to sliders. The sixteen sliders are movably connected to the interior of two sliding grooves opened on the upper and lower sides inside the four housings.

[0018] The technical effects achieved by this utility model are as follows:

[0019] This utility model uses a first steel plate and a second steel plate to fix the first and second wiring bases, thereby ensuring the stability of the first and second wiring bases during use. This avoids situations where poor stability of the first and second wiring bases can easily cause deformation of the wiring board body and plastic plate, leading to inaccurate positioning of the device during use. The cooperation between the first and second fixing mechanisms further fixes the first and second wiring bases, enhancing their stability. The cooperation between the limiting block and the limiting groove restricts the installation position between the wiring board body and the plastic plate before assembly, ensuring the accuracy of the installation position before assembly. Attached Figure Description

[0020] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 This is a rear-view three-dimensional structural diagram of the present invention;

[0022] Figure 3 This is a front-view three-dimensional structural diagram of the main body of the wiring board in this utility model;

[0023] Figure 4 This is a three-dimensional structural diagram of the plastic sheet in this utility model, viewed from below.

[0024] Figure 5 is the wiring base two perspective structure schematic diagram of bottom view in the utility model;

[0025] Figure 6 is the wiring base one perspective structure schematic diagram of front view in the utility model;

[0026] Figure 7 is the fixed mechanism one main view partial section perspective structure schematic diagram in the utility model;

[0027] Figure 8 is the fixed mechanism one main view section perspective structure schematic diagram in the utility model;

[0028] Figure 9 is the fixed mechanism two main view partial section perspective structure schematic diagram in the utility model;

[0029] Figure 10 is the fixed mechanism two main view section perspective structure schematic diagram in the utility model.

[0030] In the drawing, the component list represented by each sign is as follows:

[0031] 1, wiring board main body;2, first steel plate;3, positioning block one;4, wiring base one;5, fixed mechanism one;51, cover one;52, tooth plate one;53, gear one;54, sliding groove one;55, sliding connection plate one;56, sliding block one;57, connecting frame one;58, base clamping plate one;59, push-pull rod one;510, shell one;511, vertical plate one;512, limiting rod one;513, threaded rod one;6, fixed mechanism two;61, cover two;62, tooth plate two;63, gear two;64, sliding groove two;65, sliding connection plate two;66, sliding block two;67, connecting frame two;68, base clamping plate two;69, push-pull rod two;610, shell two;611, vertical plate two;612, limiting rod two;613, threaded rod two;7, wiring base two;8, fixed column two;9, limit block;10, fixed column one;11, plastic plate;12, limit slot;13, positioning block two;14, second steel plate. Specific implementation

[0032] In order to make the purpose and the advantage of the utility model more clearly, the following specific description of the utility model is combined with example.It should be understood that the following text is only used to describe one or several specific implementation of the utility model, and does not strictly limit the protection range of the utility model specific request.

[0033] As Figures 1-10As shown, a multi-purpose base, including the terminal block body 1, the upper end of the terminal block body 1 is provided with a first steel plate 2, the upper end of the first steel plate 2 is provided with a terminal base one 4, the left and right ends of the terminal base one 4 are respectively overlapped with the left and right sides of the fixed mechanism one 5, the lower end of the fixed mechanism one 5 is installed on the upper end of the terminal block body 1, the left side of the fixed mechanism one 5 is fixedly connected with two fixed columns one 10, the first steel plate 2 can be fixed to the terminal base one 4 during use of the device, avoiding the poor stability of the terminal base one 4, which can easily cause the deformation of the terminal block body 1, thereby causing the inaccurate positioning of the device, the cooperation between the fixed column one 10 and the fixed mechanism one 5 can further fix the terminal base one 4;

[0034] The lower end of the terminal block body 1 is provided with a plastic plate 11, the lower end of the plastic plate 11 is provided with two second steel plates 14, the bottom ends of the two second steel plates 14 are respectively provided with two terminal bases two 7, the left and right ends of the two terminal bases two 7 are respectively overlapped with the left and right sides of the two fixed mechanisms two 6, the upper ends of the two fixed mechanisms two 6 are respectively installed on the lower end of the plastic plate 11, the opposite sides of the two fixed mechanisms two 6 are respectively fixedly connected with two fixed columns two 8, the second steel plate 14 can be fixed to the terminal base two 7, thereby avoiding the poor stability of the terminal base two 7 during use, thereby avoiding the deformation of the plastic plate 11, the cooperation between the fixed column two 8 and the fixed mechanism two 6 can further fix the terminal base two 7.

[0035] Further, the first steel plate 2 is connected with four positioning blocks one 3 through the four positioning holes in the first steel plate 2, the lower end of the four positioning blocks one 3 is fixedly connected with the terminal block body 1, the two second steel plates 14 are respectively connected with eight positioning blocks two 13 through the four positioning holes in the second steel plates 14, the upper end of the eight positioning blocks two 13 is fixedly connected with the plastic plate 11, the upper end of the plastic plate 11 is fixedly connected with two limiting blocks 9, the two limiting blocks 9 are connected with the terminal block body 1 provided with two limiting grooves 12, the lower end of the two fixed columns one 10 is fixedly connected with the terminal block body 1, the upper end of the four fixed columns two 8 is fixedly connected with the plastic plate 11, the positioning blocks one 3 and the positioning blocks two 13 can limit the installation position of the first steel plate 2 and the second steel plate 14, thereby ensuring the accuracy of the installation position during the early assembly of the device, the cooperation between the limiting blocks 9 and the limiting grooves 12 can limit the installation position between the terminal block body 1 and the plastic plate 11.

[0036] Further, the fixing mechanism 5 comprises two sleeve shells 51, the lower ends of the two sleeve shells 51 are installed on the upper end of the terminal block body 1, the two sleeve shells 51 are movably connected with two gear wheels 53 through the fixing shafts arranged in the interiors of the two sleeve shells 51 respectively, the two gear wheels 53 are in meshing transmission with four toothed plates 52 respectively, the opposite far ends of each of the four toothed plates 52 are fixedly connected with a sliding connecting plate 55, the opposite far ends of each of the four sliding connecting plates 55 are fixedly connected with a connecting frame 57, the opposite far ends of the four connecting frames 57 pass through the left and right ends of the two sleeve shells 51 respectively and are fixedly connected with two base clamping plates 58, the opposite near ends of the two base clamping plates 58 are overlapped with the left and right ends of the terminal base 4 respectively, the left end of the left base clamping plate 58 is fixedly connected with two push-pull rods 59, the left ends of the two push-pull rods 59 pass through the right end of the shell 510 and are fixedly connected with a vertical plate 511, the vertical plate 511 is threadedly connected with a threaded rod 513 through the threaded holes arranged in the interior of the vertical plate 511, the left and right sides of the threaded rod 513 are movably connected with the left and right ends of the shell 510 respectively, the lower end of the shell 510 is fixedly connected with the two fixed columns 10, the vertical plate 511 is slidably connected with two limiting rods 512 through the limiting holes arranged in the interior of the vertical plate 511, the left and right ends of the two limiting rods 512 are fixedly connected on the left and right side faces in the interior of the shell 510 respectively, the upper and lower ends of each of the four sliding connecting plates 55 are fixedly connected with a sliding block 56, the eight sliding blocks 56 are movably connected in the interiors of the two slide grooves 54 arranged on the upper and lower side faces in the interiors of the two sleeve shells 51 respectively, the vertical plate 511 is driven to move rightwards by rotating the threaded rod 513, and then the left base clamping plate 58 can be driven to move rightwards under the action of the two push-pull rods 59 arranged, and the right base clamping plate 58 can be driven to move leftwards under the action of the connecting frame 57, the sliding connecting plate 55, the toothed plate 52 and the gear wheel 53 arranged in cooperation during the process that the left base clamping plate 58 moves rightwards, until the opposite near ends of the two base clamping plates 58 are overlapped with the left and right ends of the terminal base 4 respectively, at this moment, the terminal base 4 can be fixed to a great extent under the action of the first steel plate 2 arranged, the stability of the terminal base 4 during use is ensured, and the movement direction of the sliding connecting plate 55 can be limited through the cooperation of the sliding block 56 and the slide groove 54 arranged.

[0037] The two fixing mechanisms 6 each include two sleeve shells 61, the upper ends of the four sleeve shells 61 are installed at the lower end of the plastic plate 11, the four sleeve shells 61 are movably connected with four gear wheels 63 through fixing shafts 62 arranged in the sleeve shells 61, the four gear wheels 63 are in meshing transmission with eight toothed plates 62, the eight toothed plates 62 are fixedly connected with eight sliding connecting plates 65, the eight sliding connecting plates 65 are divided into four groups, the opposite distal ends of the sliding connecting plates 65 are fixedly connected with connecting frames 67, the opposite distal ends of the eight connecting frames 67 pass through the left and right ends of the four sleeve shells 61 and are fixedly connected with four base clamping plates 68, the opposite proximal ends of the four base clamping plates 68 are overlapped with the left and right ends of the two wiring bases 7, the opposite distal ends of the left and right base clamping plates 68 are fixedly connected with two push-pull rods 69, the opposite distal ends of the four push-pull rods 69 pass through the opposite proximal ends of the two shell bodies 610 and are fixedly connected with two vertical plates 611, the two vertical plates 611 are threadedly connected with two threaded rods 613 through threaded holes arranged in the vertical plates 611, the left and right sides of the two threaded rods 613 are movably connected with the left and right ends of the two shell bodies 610, the upper ends of the two shell bodies 610 are fixedly connected with four fixing columns 8, the two vertical plates 611 are slidably connected with four limiting rods 612 through two limiting holes arranged in the vertical plates 611, the left and right ends of the four limiting rods 612 are fixedly connected to the left and right sides of the interiors of the two shell bodies 610, the upper and lower ends of the eight sliding connecting plates 65 are fixedly connected with sliding blocks 66, the sixteen sliding blocks 66 are movably connected in the interiors of two slide grooves 64 arranged on the upper and lower sides of the interiors of the four sleeve shells 61, the two vertical plates 611 are driven to move close to each other by rotating the two threaded rods 613, and then the two base clamping plates 68 are driven to move close to each other by the cooperation of the push-pull rods 69, the connecting frames 67, the sliding connecting plates 65, the toothed plates 62 and the gear wheels 63, until the left and right ends of the four base clamping plates 68 are overlapped with the two wiring bases 7, at this time, the stability of the wiring bases 7 during use can be ensured under the action of the two second steel plates 14, and the movement direction of the sliding connecting plates 65 can be limited by the cooperation of the sliding blocks 66 and the slide grooves 64.

[0038] The working principle of the utility model is as follows:

[0039] In the use of the device, the cooperation between the first steel plate 2 and the second steel plate 14 arranged can play a fixed role on the wiring base one 4 and the wiring base two 7, increase the stability of the wiring base one 4 and the wiring base two 7 in the use process, through rotating the threaded rod one 513 and the threaded rod two 613 arranged, and then under the cooperation of the vertical plate one 511, the vertical plate two 611, the push-pull rod one 59, the push-pull rod two 69, the connecting frame one 57, the connecting frame two 67, the toothed plate one 52, the gear one 53, the toothed plate two 62, the gear two 63, the sliding connection plate one 55 and the sliding connection plate two 65 arranged, the two base clamping plates one 58 and the four base clamping plates two 68 can be driven to be overlapped with the left and right ends of the wiring base one 4 and the two wiring base two 7 respectively, at this time, the wiring base one 4 and the wiring base two 7 can be further fixed.

[0040] The above only is the preferred implementation mode of the present application, it should be pointed out, for the ordinary skilled in the art, without departing from the principle of the present application, under the premise of, can make a number of improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the present application. The structure, device and operation method not specifically described and explained in the present application, if no special description and limitation, are implemented according to the conventional means in the art.

Claims

1. A multi-in-one base comprising a patch panel body (1), characterized in that: The upper end of the terminal block body (1) is provided with a first steel plate (2), the upper end of the first steel plate (2) is provided with a terminal base I (4), the left and right ends of the terminal base I (4) are respectively overlapped with the left and right sides of a fixing mechanism I (5), the lower end of the fixing mechanism I (5) is installed on the upper end of the terminal block body (1), and the left side of the fixing mechanism I (5) is fixedly connected with two fixed columns I (10). The lower end of the terminal block body (1) is provided with a plastic plate (11), the lower end of the plastic plate (11) is provided with two second steel plates (14), the bottom ends of the two second steel plates (14) are provided with a terminal base II (7), the left and right ends of the two terminal base II (7) are respectively overlapped with the left and right sides of two fixing mechanisms II (6), the upper ends of the two fixing mechanisms II (6) are installed on the lower end of the plastic plate (11), and the opposite sides of the two fixing mechanisms II (6) are fixedly connected with two fixed columns II (8).

2. The all-in-one base of claim 1, wherein: The first steel plate (2) is clamped with four positioning blocks I (3) through four positioning holes in the first steel plate (2), the lower ends of the four positioning blocks I (3) are fixedly connected with the terminal block body (1), and the two second steel plates (14) are clamped with eight positioning blocks II (13) through four positioning holes in the second steel plates (14), the upper ends of the eight positioning blocks II (13) are fixedly connected with the plastic plate (11).

3. The all-in-one base of claim 1, wherein: The upper end of the plastic plate (11) is fixedly connected with two limiting blocks (9), the two limiting blocks (9) are clamped with the terminal block body (1) provided with two limiting grooves (12) in the inside, the lower ends of the two fixed columns I (10) are fixedly connected with the terminal block body (1), and the upper ends of the four fixed columns II (8) are fixedly connected with the plastic plate (11).

4. The all-in-one base of claim 1, wherein: The fixing mechanism I (5) comprises two sleeve shells I (51), the lower ends of the two sleeve shells I (51) are installed on the upper end of the terminal block body (1), the two sleeve shells I (51) are movably connected with two gear wheels I (53) through fixing shafts I arranged in the inside of the sleeve shells I (51), and the two gear wheels I (53) are meshed with four toothed plates I (52).

5. A multi-universal base as claimed in claim 4, wherein: The opposite distal ends of the four toothed plates I (52) are fixedly connected with sliding connection plates I (55), the opposite distal ends of the four sliding connection plates I (55) are fixedly connected with connection frames I (57), and the opposite distal ends of the four connection frames I (57) pass through the left and right ends of the two sleeve shells I (51) and are fixedly connected with two base clamping plates I (58).

6. A multi-universal base as claimed in claim 5, wherein: The opposite close ends of the two base clamping plates one (58) are respectively overlapped with the left and right ends of the wiring base one (4), the left end of the left base clamping plate one (58) is fixedly connected with two push-pull rods one (59), the left ends of the two push-pull rods one (59) are respectively penetrated through the right end of the shell one (510) and are fixedly connected with the vertical plate one (511), the vertical plate one (511) is threadedly connected with the threaded rod one (513) through the threaded hole formed in the inside thereof, and the left and right sides of the threaded rod one (513) are movably connected with the left and right ends of the shell one (510).

7. A multi-universal base as claimed in claim 6, characterized in that: The lower end of the shell one (510) is fixedly connected with the two fixed columns one (10), the vertical plate one (511) is slidably connected with the two limiting rods one (512) through the two limiting holes formed in the inside thereof, the left and right ends of the two limiting rods one (512) are fixedly connected to the left and right side surfaces in the inside of the shell one (510), and the upper and lower ends of the four sliding connection plates one (55) are fixedly connected with the sliding blocks one (56), and the eight sliding blocks one (56) are movably connected in the interiors of the two slide grooves one (54) formed in the upper and lower side surfaces in the inside of the two sleeve shells one (51).

8. The all-in-one base of claim 1, wherein: The two fixed mechanisms two (6) each include two sleeve shells two (61), the upper ends of the four sleeve shells two (61) are mounted to the lower end of the plastic plate (11), the four sleeve shells two (61) are movably connected with the four gear wheels two (63) through the fixed shafts two arranged in the interiors thereof, respectively, the four gear wheels two (63) are in meshing transmission with the eight toothed plates two (62), respectively, the eight toothed plates two (62) are fixedly connected with the eight sliding connection plates two (65), the eight sliding connection plates two (65) are each divided into four groups, and the opposite distal ends of the sliding connection plates two (65) are fixedly connected with the connecting frames two (67), respectively, the opposite distal ends of the eight connecting frames two (67) are respectively penetrated through the left and right ends of the four sleeve shells two (61) and are fixedly connected with the four base clamping plates two (68).

9. A multi-universal base as claimed in claim 8, characterized in that: The opposite close ends of the four base clamping plates two (68) are respectively overlapped with the left and right ends of the two wiring bases two (7), the opposite distal ends of the base clamping plates two (68) on the left and right sides are fixedly connected with the two push-pull rods two (69), respectively, the opposite distal ends of the four push-pull rods two (69) are respectively penetrated through the opposite close ends of the two shell two (610) and are fixedly connected with the two vertical plates two (611), respectively, the two vertical plates two (611) are threadedly connected with the two threaded rods two (613) through the threaded holes formed in the interiors thereof, respectively, and the left and right sides of the two threaded rods two (613) are movably connected with the left and right ends of the two shell two (610).

10. The all-in-one base of claim 9, wherein: The upper ends of the two shell two (610) are fixedly connected with four fixed columns two (8) respectively, the two vertical boards two (611) are slidably connected with four limiting rods two (612) through two limiting holes in the interiors of the two vertical boards two (611) respectively, the left and right ends of the four limiting rods two (612) are fixedly connected to the left and right side faces in the interiors of the two shell two (610) respectively, and the upper and lower ends of the eight sliding connecting plates two (65) are fixedly connected with sliding blocks two (66).