Nursing massage device for neurosurgery department

Abstract

The invention provides a neurosurgical nursing massage device which structurally comprises a non-slip mat, a base, a control panel, an electrified ring and a massage body, the non-slip mat covers the lower end of the base, and the side edge of the upper end of the base is vertically and fixedly connected with the control panel; after the massage main body is further improved, a conductive block, a coincidence piece, a fixing ring and a tightening structure can be positioned in an internal area of the massage main body through a vertical sleeve, so that after limbs of a patient enter the tightening structure through a through cavity, a control module of the tightening structure can be combined with the conductive block to be electrically controlled by a control panel; the control rod can drive the expansion ring to tighten or expand, so that the limbs of the patient can be completely covered, the massage main body can be in full contact with the limbs of the patient for stimulation massage, and the use intensity of the massage device can be improved; and the problem that the massage main body cannot stably wrap the limbs of the patients due to different weights of the limbs of the patients is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of neurosurgery medical appliances, and more specifically to a neurosurgery nursing massage device. Background Art

[0002] Neurosurgery is a surgical specialty that treats central nervous system diseases. Neurosurgery patients can use nursing massage devices to massage the treated area after treatment, so that the repaired nervous system can be stimulated by external stimuli to achieve the effect of increasing the speed of recovery. Therefore, the use of nursing massage devices can improve the recovery efficiency of the patient's nervous system after treatment, and can quickly adapt to the stimulation of the outside world; In summary, the inventors have found that the existing nursing massage devices mainly have the following defects: since the diameters of the current nursing massage devices are all consistent, when serving patients with relatively thin limbs, due to the influence of the large diameter, the patient's limbs cannot be fully wrapped by the device during the massage process when they are parallelly extended into the device, so that the limb nerves of the thin patients cannot be covered and contacted by the device, thereby reducing the intensity of the nursing massage assistance. Therefore, the current nursing massage devices will be limited in the service population due to the inability to adjust their own diameter. Summary of the invention

[0003] The technical solution adopted by the present invention to achieve the technical purpose is: a neurosurgery care massage device, whose structure includes: an anti-slip pad, a base, a control panel, an electric ring, and a massage body, the anti-slip pad covers the lower end of the base, the upper side of the base is vertically fixedly connected to the control panel, the electric ring is embedded in the surface center of the control panel and is electrically connected, the massage body is electrically connected to the electric ring and is on the same vertical line with the electric ring, and the massage body is arranged on the upper part of the base.

[0004] As a further improvement of the present invention, the massage body is provided with a vertical sleeve, a conductive block, an overlapped piece, a fixed ring, a through cavity, and a tightening structure. The center of the circle of the vertical sleeve and the conductive block coincide with each other. The conductive block is fixed to the lower end of the overlapped piece. The fixed ring is installed in the middle and upper part of the overlapped piece. The through cavity runs through the center of the overlapped piece. The tightening structure is positioned in the middle and lower part of the overlapped piece and communicates with the inside of the through cavity. The overlapped piece carries the tightening structure through the fixed ring until the conductive block is embedded in the inner center of the vertical sleeve and coincides with it. The tightening structure completes the electrical connection with the power-on ring through the conductive block and is controlled by the control panel. The diameter of the vertical sleeve is larger than the diameter of the conductive block. The overlapped piece is in the shape of a vertical cylinder. The fixed ring is in a solid shape. The through cavity is set in a vertical orientation. The tightening structure is arranged in the middle and lower part of the overlapped piece.

[0005] As a further improvement of the present invention, the tightening structure is provided with an overlapping ring, a control module, a control rod, and an expansion ring. The outer layer of the overlapping ring is fixedly connected to the control module, the interior of the control module is electrically connected to the control rod and is embedded in the middle and lower area of ​​the vertical sleeve through the overlapping ring and is electrically connected to the conductive block at the same time. The control rod is arranged at the lower end of the control module and penetrates the overlapping ring, the expansion ring is fixedly connected to the lower end of the control rod, and the expansion ring and the overlapping ring are in the same center area; the edge of the overlapping ring carries four control modules, the number of control rods is consistent with the number of control modules, and the expansion ring is a rubber product.

[0006] As a further improvement of the present invention, the control rod is provided with a locking block, a contact layer, a solid block, a vertical rod, a slider, and a balancing block. The locking block is embedded in the bottom area of ​​the contact layer, the solid block and the contact layer are an integrated structure, the vertical rod is fixed to the upper end center of the solid block, the slider is embedded in the surface center of the vertical rod, the balancing block is welded to the upper end of the vertical rod, the vertical rod passes through the center of the control module through the slider and is electrically connected thereto, and the vertical rod passes through the middle and lower part of the vertical sleeve through the slider and the control module; the locking blocks are provided in three groups on the contact layer, the contact layer and the solid block are both arc-shaped, and the center of the vertical rod carries an electric slider.

[0007] As a further improvement of the present invention, the vertical sleeve is provided with an adaptor cavity, a cylinder, an assembly groove, a limit frame, a movable rail, and an adsorption ring; the adaptor cavity passes through the center area of ​​the cylinder, the assembly groove is arranged in the middle and upper part of the cylinder, the limit frame is embedded in the middle and lower edge of the cylinder, the movable rail passes through the middle and lower edge of the cylinder through the limit frame, the adsorption ring is fixed to the lower end of the cylinder, and the limit frame is connected with the tightening structure through the movable rail; the adaptor cavity is set in a vertical orientation, the surface of the assembly groove of the cylinder is in a fine polished form, and the limit frames are provided with four groups and are distributed at the middle and lower edge of the cylinder.

[0008] As a further improvement of the present invention, the limit frame is provided with a protrusion, a frame body, a positioning block, and an auxiliary wheel. The protrusion is welded to the central parts of the left and right sides of the frame body, the interior of the frame body is fixedly connected to the positioning block, the auxiliary wheel is embedded in the central part of the positioning block, the frame body is fixed to the middle and lower edge part of the cylinder through the protrusion, and the auxiliary wheel is connected to the movable rail through the positioning block; the protrusion is provided with one protrusion on each of the left and right sides of the frame body, and the positioning block is provided with a total of six groups on the inner wall of the frame, and the auxiliary wheel is in the form of a solid sphere.

[0009] As a further improvement of the present invention, a screw, a parallel block and an arc-shaped cavity are newly provided at the surface center of the positioning block, the screw is welded to the lower end of the parallel block, the arc-shaped cavity is arranged at the upper end center of the parallel block and is an integrated structure therewith, and the parallel block is locked to the surface center of the positioning block by the screw; the screw is a solid vertical shape, and the parallel block is circular.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. The massage body of the present invention is further improved. The conductive block, overlapping part, fixing ring and tightening structure can be positioned in the internal area of ​​the body through the vertical sleeve, so that after the patient's limb enters the tightening structure through the through cavity, the control module of the tightening structure can be electrically controlled by the control panel in combination with the conductive block, so that the control rod can drive the expansion ring to tighten or expand, thereby completely covering the patient's limb, so that the massage body can be in full contact with the patient's limb for stimulating massage, thereby improving the use intensity of the massage device, and preventing the massage body from being unable to stably wrap the limb of each patient due to the inconsistency of fatness and thinness.

[0011] 2. The present invention is further improved from the vertical sleeve. The adsorption ring at the lower end of the cylinder can improve the connection stability between itself and the power-on ring. At the same time, the assembly groove at the middle and upper end of the cylinder allows the fixed ring to be embedded, so that it can improve the overlap accuracy of the tightening structure with its own center of circle. Then, the limit frame at the middle and lower edge can determine the position of the movable rail, so that the control rod can move through the position of the movable rail to achieve a stable control of the movement of the expansion ring. Subsequently, the auxiliary wheels carried on the inner wall area of ​​the limit frame can allow the control rod to be pushed, so that it can improve the sliding smoothness of the control rod and prevent jamming during sliding. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is a structural schematic diagram of a neurosurgery nursing massage device.

[0013] Figure 2 The invention relates to a schematic diagram of a three-dimensional structure of an improved massage main body.

[0014] Figure 3 The present invention is a schematic diagram of a structure viewed from above after an improvement of a tightening structure.

[0015] Figure 4 The present invention is a schematic diagram of the structure of a cross-section of an improved control rod.

[0016] Figure 5 The present invention is a schematic diagram of a three-dimensional structure after improvement of a vertical sleeve.

[0017] Figure 6 The present invention is a schematic diagram of the structure of a cross-section view of an improved limit frame.

[0018] Figure 7 The present invention is a three-dimensional structural schematic diagram of a newly added component at the upper center of a positioning block.

[0019] In the figure: anti-slip mat-1, base-2, control panel-3, power ring-4, massage body-5, vertical sleeve-51, conductive block-52, overlap piece-53, fixed ring-54, through cavity-55, tightening structure-56, overlapping ring-561, control module-562, control rod-563, expansion ring-564, locking block-a1, contact layer-a2, solid block-a3, vertical rod-a4, slider-a5, balancing block-a6, adaptation cavity-511, cylinder-512, assembly groove-513, limit frame-514, movable rail-515, adsorption ring-516, protrusion-a1, frame-a2, positioning block-a3, auxiliary wheel-a4, screw-a31, parallel block-a32, arc cavity-a33. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings: Example

[0021] Figures 1 to 4 As shown: The present invention provides a neurosurgery nursing massage device. Its structure includes an anti-slip mat 1, a base 2, a control panel 3, an electric ring 4, and a massage body 5. The anti-slip mat 1 covers the lower end of the base 2, the upper side of the base 2 is vertically fixedly connected to the control panel 3, the electric ring 4 is embedded in the center of the surface of the control panel 3 and is electrically connected, the massage body 5 is electrically connected to the electric ring 4 and is on the same vertical line with the electric ring, and the massage body 5 is arranged on the upper part of the base 2.

[0022] The massage body 5 is provided with a vertical sleeve 51, a conductive block 52, a overlapped piece 53, a fixing ring 54, a through cavity 55, and a tightening structure 56. The centers of the vertical sleeve 51 and the conductive block 52 coincide with each other. The conductive block 52 is fixed to the lower end of the overlapped piece 53. The fixing ring 54 is installed in the middle and upper part of the overlapped piece 53. The through cavity 55 runs through the center of the overlapped piece 53. The tightening structure 56 is positioned in the middle and lower part of the overlapped piece 53 and communicates with the inside of the through cavity 55. The tightening structure 56 is carried by the fixing ring 54 to the conductive block 52, which is embedded in the inner center of the vertical sleeve 51 and overlapped with it. The tightening structure 56 is electrically connected to the power ring 4 through the conductive block 52 and is controlled by the control panel 3. The diameter of the vertical sleeve 51 is larger than that of the conductive block 52. The overlapping piece 53 is in the form of a vertical cylinder. The fixing ring 54 is in a solid form. The through cavity 55 is set in a vertical orientation. The tightening structure 56 is arranged at the middle and lower part of the overlapping piece 53. The vertical sleeve 51 can stably and completely vertically wrap the conductive block 52 and other components through its diameter shape, the overlapping piece 53 can match the shape of the vertical sleeve 51 through its cylindrical shape, the fixing ring 54 can improve the connection stability between itself and the vertical sleeve 51 through its solid shape, the through cavity 55 can allow the limbs to be inserted in a vertical position by being vertically set, and the tightening structure 56 can completely cover and wrap the patient's limbs by being set in the middle and lower part of the overlapping piece 53.

[0023] The tightening structure 56 is provided with an overlapping ring 561, a control module 562, a control rod 563, and an expansion ring 564. The outer layer of the overlapping ring 561 is fixedly connected to the control module 562. The inside of the control module 562 is electrically connected to the control rod 563 and is embedded in the middle and lower area of ​​the vertical sleeve 51 through the overlapping ring 561 and is electrically connected to the conductive block 52 at the same time. The control rod 563 is arranged at the lower end of the control module 562 and penetrates the overlapping ring 561. The expansion ring 564 is fixedly connected to the lower end of the control rod 563. The expansion ring 564 and the overlapping ring 561 are in the same center area. The edge of the overlapping ring 561 carries four control modules 562. The number of the control rods 563 is consistent with the number of the control modules 562. The expansion ring 564 is made of rubber. The four control modules 562 on the edge of the overlapping ring 561 can match the number of the control rods 563, so that the control rods 563 can work in conjunction with the control modules 562, and the expansion ring 564 is driven by the control rods 563 with stable rubber properties.

[0024] The control rod 563 is provided with a locking block a1, a contact layer a2, a solid block a3, a vertical rod a4, a slider a5, and a balancing block a6. The locking block a1 is embedded in the bottom area of ​​the contact layer a2. The solid block a3 and the contact layer a2 are an integrated structure. The vertical rod a4 is fixed to the center of the upper end of the solid block a3. The slider a5 is embedded in the center of the surface of the vertical rod a4. The balancing block a6 is welded to the upper end of the vertical rod a4. The vertical rod a4 passes through the center of the control module 562 through the slider a5 and is electrically connected thereto. The vertical rod a4 passes through the middle and lower part of the vertical sleeve 51 through the slider a5 and the control module 562. There are three groups of locking blocks a1 on the contact layer a2. The contact layer a2 and the solid block a3 are both arc-shaped. The center of the vertical rod a4 carries an electric slider a5. The locking blocks a1 can improve the connection firmness between the solid blocks a3 and the components through three groups, the solid blocks a3 and the contact layer a2 can match the shape of the components through the arc shape, and the vertical rod a4 can slide using the electric slider a5 in the center.

[0025] Specific functions and operation procedures of this embodiment: In the present invention, First, the base 2 of the neurosurgery nursing massage device can be installed in a specific neurosurgery use area in combination with the anti-slip pad 1. Then, after the control panel 3 of the base 2 is energized with the outside, the massage body 5 can be electrically controlled through the power ring 4, so that after the patient's limbs are inserted into the massage body 5, a stable massage effect can be achieved in combination with the full clamping contact of the massage body 5, thereby improving the auxiliary treatment intensity of the massage device; Second, the vertical sleeve 51 of the massage body 5 can contain and cover the conductive block 52, the overlapping piece 53 and other components inside itself, so that the overlapping piece 53 can be connected with the vertical sleeve 51 with the cooperation of the fixing ring 54, and then the through cavity 55 of the overlapping piece 53 can allow the patient's limbs to be inserted and inserted. After the position of the patient's limbs is corrected, the control panel 3 can control the tightening structure 56 in combination with the conductive block 52, so that the tightening structure 56 can adjust its own diameter according to the fatness or thinness of the patient's limbs, so that it can completely match the patient's limbs, thereby preventing the mismatch caused by inconsistent diameters and reducing the massage effect; Third: the overlapping ring 561 of the tightening structure 56 can allow four control rods 563 to be embedded through the four control modules 562 at the edge, so that the control rods 563 can slide linearly in the center of the control module 562. Therefore, under the sliding control of the control rods 563, the diameter of the expansion ring 564 connected thereto will be changed, so that it can be in full contact with the patient's limbs, thereby improving the auxiliary treatment effect of the massage device on the patient's limbs; Fourth: the solid block a3 of the control rod 563 can complete the fixed connection with the edge of the expansion ring 564 through the arc contact layer a2 and the locking block a1, and then the vertical rod a4 at the center of the upper end of the solid block a3 allows the slider a5 to be embedded. Therefore, the slider a5 can perform a linear sliding effect inside the control module 562 under the electrical control effect of the control module 562, and can use the balance block a6 to maintain its own balance during the sliding process, thereby improving the stability of the operation of controlling the expansion ring 564. Example

[0026] Figures 5 to 7 As shown: The present invention provides a neurosurgery nursing massage device. Its structure includes: the vertical sleeve 51 is provided with an adapting cavity 511, a cylinder 512, an assembly groove 513, a limit frame 514, a movable rail 515, and an adsorption ring 516; the adapting cavity 511 penetrates the center area of ​​the cylinder 512; the assembly groove 513 is arranged at the middle and upper part of the cylinder 512; the limit frame 514 is embedded in the middle and lower edge of the cylinder 512; the movable rail 515 penetrates the middle and lower edge of the cylinder 512 through the limit frame 514; the adsorption ring 516 is fixed to the lower end of the cylinder 512; the limit frame 514 is connected with the tightening structure 56 through the movable rail 515; the adapting cavity 511 is set in a vertical orientation; the surface of the assembly groove 513 of the cylinder 512 is finely polished; the limit frames 514 are provided with four groups and are distributed at the middle and lower edge of the cylinder 512; The adapting cavity 511 can allow the component to be embedded in a vertical orientation through vertical orientation setting, the cylinder 512 can overlap and connect with the upper and lower layers of the component through the finely polished assembly groove 513, and the limit frame 514 can determine the position of the four movable rails 515 through four groups.

[0027] The limit frame 514 is provided with a protrusion a1, a frame a2, a positioning block a3, and an auxiliary wheel a4. The protrusion a1 is welded to the central parts of the left and right sides of the frame a2. The interior of the frame a2 is fixedly connected with the positioning block a3. The auxiliary wheel a4 is embedded in the central part of the positioning block a3. The frame a2 is fixed to the middle and lower edge of the cylinder 512 through the protrusion a1. The auxiliary wheel a4 is connected to the movable rail 514 through the positioning block a3. The protrusion a1 is provided on each of the left and right sides of the frame a2. The positioning block a3 is provided in six groups on the inner wall of the frame a2. The auxiliary wheel a4 is a solid spherical shape. The protrusions a1 can improve the connection firmness between the frame a2 and the components by being located on the left and right sides of the frame a2. The positioning blocks a3 can allow six auxiliary wheels a4 to be installed through six groups. The auxiliary wheels a4 can push the components stably through the solid spherical shape, thereby improving the sliding smoothness of the components.

[0028] Among them, a screw a31, a parallel block a32, and an arc cavity a33 are newly provided at the surface center of the positioning block a3. The screw a31 is welded to the lower end of the parallel block a32. The arc cavity a33 is arranged at the upper end center of the parallel block a32 and is an integrated structure therewith. The parallel block a32 is locked to the surface center of the positioning block a3 by the screw a31. The screw a31 is a solid vertical shape, and the parallel block a32 is a circular shape. The screw a31 can allow the parallel block a32 to be embedded and locked in a vertical position through a solid vertical shape, and the parallel block a32 can match the shape of the component through a circular shape, and then use the arc cavity a33 to allow the component to rotate inside itself.

[0029] Specific functions and operation procedures of this embodiment: In the present invention, First, the cylindrical body 512 of the vertical sleeve 51 can improve the fixed connection with the power ring 4 through the bottom adsorption ring 516, and at the same time, the vertical adaptation cavity 511 of the cylindrical body 512 allows the overlapped member 53 to be embedded in a vertical position, and then the fixing ring 54 is inserted and fixed by using the assembly groove 513, so that the overlapped member 53 can be installed in the vertical sleeve 51 in a vertical position, and then the four groups of limit frames 514 at the edge of the middle and lower area can determine the positions of the four movable rails 515, so that the control rod 563 of the tightening structure 56 can slide stably in a straight line through the movable rail 515, thereby improving the stability of the diameter adjustment of the expansion ring 564; Second: the frame a2 of the limit frame 514 can improve the connection and fixation with the middle and lower edges of the cylinder 512 through the protrusions a1 on the left and right sides, and then the positioning block a3 inside the frame a2 can determine the position of the auxiliary wheel a4, so that the ball auxiliary wheel a4 can be pushed when the control rod 563 is working, so that the control rod 563 can be combined with the auxiliary wheel a4 to move smoothly inside the movable rail 515, thereby preventing the occurrence of jamming and blocking; Third: the parallel block a32 added to the center of the positioning block a3 can be fixed to the center of the surface of the positioning block a3 by means of the screw a31, and then the parallel block a32 can use its own arc cavity a33 to allow the spherical auxiliary wheel a4 to rotate stably inside itself, thus avoiding the square area rotation being affected by the edges and corners and destroying the smoothness of the surface of the auxiliary wheel a4, so that the auxiliary wheel a4 can be rotated and used in a complete state.

[0030] Utilizing the technical solution of the present invention, or those skilled in the art designing similar technical solutions inspired by the technical solution of the present invention to achieve the above-mentioned technical effects, all fall within the protection scope of the present invention.

Claims

1. A neurosurgery nursing massage device, the structure of which includes: An anti-skid pad (1), a base (2), a control panel (3), an energizing ring (4), and a massage body (5), characterized in that: the anti-skid pad (1) covers the lower end of the base (2), the upper side of the base (2) is vertically fixedly connected to the control panel (3), the energizing ring (4) is embedded in the center of the surface of the control panel (3) and is electrically connected, the massage body (5) is electrically connected to the energizing ring (4) and is on the same vertical line with the energizing ring (4), and the massage body (5) is arranged on the upper part of the base (2); The massage body (5) is provided with a vertical sleeve (51), a conductive block (52), a overlapped piece (53), a fixed ring (54), a through cavity (55), and a tightening structure (56). The center of the vertical sleeve (51) and the conductive block (52) are mutually coincident. The conductive block (52) is fixed to the lower end of the overlapped piece (53). The fixed ring (54) is installed at the middle and upper part of the overlapped piece (53). The through cavity (55) runs through the center of the overlapped piece (53). The tightening structure (56) is positioned at the middle and lower part of the overlapped piece (53) and communicates with the inside of the through cavity (55). The overlapped piece (53) carries the tightening structure (56) through the fixed ring (54) and is embedded in the inner center of the vertical sleeve (51) and coincides with the conductive block (52). The tightening structure (56) is electrically connected to the power ring (4) through the conductive block (52) and is controlled by the control panel (3).

2. A neurosurgery nursing massage device according to claim 1, characterized in that: The tightening structure (56) is provided with an overlapping ring (561), a control module (562), a control rod (563), and an expansion ring (564); the outer layer of the overlapping ring (561) is fixedly connected to the control module (562); the interior of the control module (562) is electrically connected to the control rod (563) and is embedded in the middle and lower area of ​​the vertical sleeve (51) through the overlapping ring (561) and is electrically connected to the conductive block (52); the control rod (563) is arranged at the lower end of the control module (562) and penetrates the overlapping ring (561); the expansion ring (564) is fixedly connected to the lower end of the control rod (563); and the expansion ring (564) and the overlapping ring (561) are located in the same circle center area.

3. A neurosurgery nursing massage device according to claim 2, characterized in that: The control rod (563) is provided with a locking block (a1), a contact layer (a2), a solid block (a3), a vertical rod (a4), a slider (a5), and a balancing block (a6); the locking block (a1) is embedded in the bottom area of ​​the contact layer (a2); the solid block (a3) ​​and the contact layer (a2) are an integrated structure; the vertical rod (a4) is fixed to the center of the upper end of the solid block (a3); the slider (a5) is embedded in the center of the surface of the vertical rod (a4); the balancing block (a6) is welded to the upper end of the vertical rod (a4); the vertical rod (a4) passes through the center of the control module (562) through the slider (a5) and is electrically connected thereto; the vertical rod (a4) passes through the middle and lower part of the vertical sleeve (51) through the slider (a5) and the control module (562).

4. A neurosurgery nursing massage device according to claim 1, characterized in that: The vertical sleeve (51) is provided with an adapting cavity (511), a cylinder (512), an assembly groove (513), a limiting frame (514), a movable rail (515), and an adsorption ring (516); the adapting cavity (511) penetrates the center area of ​​the cylinder (512); the assembly groove (513) is arranged at the middle and upper part of the cylinder (512); the limiting frame (514) is embedded in the middle and lower edge of the cylinder (512); the movable rail (515) penetrates the middle and lower edge of the cylinder (512) through the limiting frame (514); the adsorption ring (516) is fixed to the lower end of the cylinder (512); and the limiting frame (514) is connected to the tightening structure (56) through the movable rail (515).

5. A neurosurgery nursing massage device according to claim 4, characterized in that: The limit frame (514) is provided with a protrusion (a1), a frame body (a2), a positioning block (a3), and an auxiliary wheel (a4); the protrusion (a1) is welded to the center parts of the left and right sides of the frame body (a2); the interior of the frame body (a2) is fixedly connected to the positioning block (a3); the auxiliary wheel (a4) is embedded in the center part of the positioning block (a3); the frame body (a2) is fixed to the middle and lower edge part of the cylinder (512) through the protrusion (a1); and the auxiliary wheel (a4) is connected to the movable rail (514) through the positioning block (a3).

6. A neurosurgery nursing massage device according to claim 5, characterized in that: A screw (a31), a parallel block (a32), and an arc-shaped cavity (a33) are newly provided at the surface center of the positioning block (a3); the screw (a31) is welded to the lower end of the parallel block (a32); the arc-shaped cavity (a33) is arranged at the upper end center of the parallel block (a32) and is an integrated structure therewith; the parallel block (a32) is locked to the surface center of the positioning block (a3) ​​by the screw (a31).

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