CN116250835A

CN116250835A - Sampling needle head for detecting virus in blood

Info

Publication number: CN116250835A
Application number: CN202310261275.XA
Authority: CN
Inventors: 张利泉; 许国峰
Original assignee: Disease Prevention And Control Center Of Penglai District Yantai City
Current assignee: Disease Prevention And Control Center Of Penglai District Yantai City
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-06-13

Abstract

The invention relates to the technical field of blood taking needles, in particular to a sampling needle for detecting viruses in blood, which comprises a containing base, wherein the top surface of the containing base is provided with a needle, the bottom end of the containing base is provided with a disinfection wiper, the bottom end of the containing base is provided with a sealing element, the sealing element covers and protects the disinfection wiper, the top surface of the containing base is provided with a protective frame, the surface of the protective frame is provided with a top plate, the surface of the top plate is movably inserted with a telescopic needle protection element, and the top end of the needle is protected; the beneficial effects are as follows: the sampling needle head for detecting the virus in blood is provided with the hidden and contained disinfection wiping piece at the bottom of the containing base, and the disinfection wiping piece is matched with the sampling needle head, so that a sterilized object is not required to be specially matched, and the sampling efficiency is improved; and the top end of the sampling needle is provided with a telescopic needle protection piece which is rebounded after being pressed down, so that the needle is protected, and articles and operators are prevented from being scratched by the needle.

Description

Sampling needle head for detecting virus in blood

Technical Field

The invention relates to the technical field of blood taking needles, in particular to a sampling needle head for detecting viruses in blood.

Background

Clinical blood tests can be categorized into general blood tests, laboratory tests for hemolytic anemia, bone marrow cytology tests, blood typing and cross-matching tests. Can detect the blood-learning sign of common hematopathy.

In the prior art, when blood is detected, virus in the blood is required to be detected, a disposable blood taking needle is generally adopted for operation, firstly, a cotton swab is used for dipping alcohol and wiping the finger of a patient, the disinfection treatment of the blood taking needle insertion part is realized, then the disposable blood taking needle is pricked down at the disinfected finger and then pulled out, and after the disposable blood taking needle is thrown away, a detection test piece is adopted for dipping the blood on the surface of the finger.

However, the conventional blood sampling operation process is complicated, namely, the time for taking a cotton swab and opening and closing a container for storing alcohol is taken, and a special disinfection article is required while carrying a disposable blood taking needle; and traditional disposable blood taking needle presses back syringe needle and exposes, has the infection hidden danger that the syringe needle fish tail medical personnel brought under the condition of no closing cap, and has the syringe needle to scratch the leakage problem that medical waste collection bag brought.

Disclosure of Invention

The invention aims to provide a sampling needle for detecting viruses in blood, which solves the problems in the prior art.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a virus detects with sample syringe needle in blood, is provided with the syringe needle including dress flourishing base including the top surface of dress flourishing base, the bottom of dress flourishing base is provided with disinfection wiper, and the bottom of dress flourishing base is provided with the sealing member, and the sealing member covers the protection to the disinfection wiper, and the top surface of dress flourishing base is provided with the enclosure frame, and the surface activity of enclosure frame is provided with the roof, and the surface activity grafting of roof has flexible needle protection spare, is enclosed to the syringe needle top, and the top of enclosure frame is provided with dismantlement formula closing cap mechanism for protect flexible needle protection.

Preferably, the package Cheng De is in a square frame structure, the disinfection wiping piece comprises an alcohol-soaked cotton ball, the alcohol-soaked cotton ball is fixed on the top surface of the groove body of the package base, the thickness of the alcohol-soaked cotton ball is larger than the depth of the groove body of the package base, and the sealing piece extrudes the alcohol-soaked cotton ball into the groove body of the package base to be stored.

Preferably, the sealing member includes shrouding, butt joint inserted sheet, limit groove, leading-in inserted handle, screens inserted handle, elasticity hoop board, rubber gasket and sealing washer, sealing washer is annular platelike structure, sealing washer is fixed in the bottom surface of holding the base, sealing washer's interior ring mouth size is greater than the notch size of holding the base, the shrouding is in the bottom of holding the base and shrouding extrusion sealing washer, the butt joint inserted sheet is provided with two sets of, two sets of butt joint inserted sheets are all fixed on the surface of shrouding, and limit groove and butt joint inserted sheet one-to-one, the limit groove is seted up on the lateral wall of holding the base, and butt joint inserted sheet activity is pegged graft in the limit groove.

Preferably, the surface mounting of limit groove has the elasticity hoop board, and the elasticity hoop board is "C" font platy structure, and the screens is inserted the handle and is pegged graft in the interior ring mouth of elasticity hoop board, and the screens is inserted the handle and is cylindrical structure, and the one end of leading-in inserting the handle is fixed on the surface of screens and is inserted the handle, and the other end of leading-in inserting the handle is fixed on the surface of butt joint inserted sheet, and rubber gasket is provided with two sets of, and two sets of rubber gasket are with holding base symmetric distribution, and rubber gasket and limit groove are along holding base's alternate distribution all around, and the one side that the rubber gasket kept away from holding base is provided with convex curved surface.

Preferably, the top plate is fixed in a notch at the top of the enclosure frame, the top surface of the top plate is flush with the top surface of the enclosure frame, and the telescopic needle protection piece is centered on the surface of the top plate.

Preferably, the flexible needle protection piece includes wearing mouth, flexible sheath, mounting groove, bifurcation groove, elasticity rubber ring, elasticity rubber traction area, separation blade and ramp, wears the mouth to offer at the surface of roof, flexible sheath activity grafting in wearing mouth, the separation blade is square piece, the separation blade is provided with a plurality of, a plurality of separation blades are arranged along the lateral wall of digging the groove and are distributed, the separation blade is spacing to flexible sheath, flexible sheath can't follow wearing mouth and take out, the surface at the separation blade is fixed to the ramp, ramp and separation blade slope.

Preferably, the mounting groove is formed in the bottom surface of the telescopic sheath, the mounting groove is an annular groove, the inner ring caliber of the mounting groove is larger than that of the telescopic sheath, the top end of the needle head penetrates through the inner ring opening of the telescopic sheath, the bifurcation groove is formed in the bottom surface of the telescopic sheath, the bifurcation groove is communicated with the mounting groove, four bifurcation grooves are formed, and the four bifurcation grooves are distributed in a cross arrangement mode.

Preferably, the elastic rubber ring is of an annular plate-shaped structure, the elastic rubber ring is fixed on the surface of the mounting groove, the elastic rubber traction belts are in one-to-one correspondence with the bifurcation grooves, one end of each elastic rubber traction belt is integrally formed on the surface of the elastic rubber ring, one end of each elastic rubber traction belt extends into each bifurcation groove, and the other end of each elastic rubber traction belt is fixed on the bottom surface of the top plate.

Preferably, the detachable sealing cover mechanism comprises a limiting frame, a sealing cover, a positioning inserting rod, a positioning hole, an elastic rubber ball and a digging groove, wherein the limiting frame is of an annular plate-shaped structure, the limiting frame is fixed on the top surface of the enclosure frame, the sealing cover is of a square frame body structure, the sealing cover is movably inserted into an inner ring opening of the limiting frame, and after the limiting frame contacts with the top surface of the enclosure frame, a gap is reserved between the top end of the telescopic sheath and the top plate of the sealing cover.

Preferably, the locating holes are formed in a plurality of positions, the locating inserting rods are arranged on the surface of the top plate in a one-to-one correspondence mode, the locating inserting rods are movably inserted into the locating holes, one ends of the locating inserting rods are fixedly connected with elastic rubber balls, the diameters of the elastic rubber balls are larger than the diameters of the locating holes, the other ends of the locating inserting rods are fixed on the bottom surface of the top plate of the sealing cover, and the elastic rubber balls are located below the locating holes when the bottom surface of the sealing cover is lapped on the top surface of the enclosure frame.

Compared with the prior art, the invention has the beneficial effects that:

the sampling needle head for detecting the virus in blood is provided with the hidden and contained disinfection wiping piece at the bottom of the containing base, and the disinfection wiping piece is matched with the sampling needle head, so that a sterilized object is not required to be specially matched, and the sampling efficiency is improved; and the top end of the sampling needle is provided with a telescopic needle protection piece which is rebounded after being pressed down, so that the needle is protected, and articles and operators are prevented from being scratched by the needle.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is an enlarged schematic view of the structure A in FIG. 1;

FIG. 3 is a schematic view of the present invention in semi-section;

FIG. 4 is an enlarged schematic view of the structure shown at B in FIG. 3;

FIG. 5 is a schematic view of a semi-sectional structure of a seal plate according to the present invention;

FIG. 6 is a schematic view of the seal plate of the present invention after removal;

FIG. 7 is an enlarged schematic view of the structure of FIG. 6 at C;

FIG. 8 is a schematic view of the structure of the invention with the cover removed;

FIG. 9 is a schematic view of the bottom structure of the top plate of the present invention;

fig. 10 is a schematic view of the telescopic sheath of the present invention.

In the figure: the device comprises a containing base 1, an alcohol-soaked cotton ball 2, a sealing plate 3, a butt joint inserting piece 4, a side groove 5, a leading-in inserting handle 6, a clamping inserting handle 7, an elastic hoop plate 8, a rubber gasket 9, a sealing backing ring 10, a needle 11, a retaining frame 12, a top plate 13, a penetrating opening 14, a telescopic sheath 15, a mounting groove 16, a bifurcation groove 17, an elastic rubber ring 18, an elastic rubber traction belt 19, a limiting frame 20, a sealing cover 21, a positioning inserting rod 22, a positioning hole 23, an elastic rubber ball 24, a scratching groove 25, a blocking piece 26 and a slope plate 27.

Detailed Description

In order to make the objects, technical solutions, and advantages of the present invention more apparent, the embodiments of the present invention will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some, but not all, embodiments of the present invention, are intended to be illustrative only and not limiting of the embodiments of the present invention, and that all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort are within the scope of the present invention.

Example 1

Referring to fig. 1, 3, 6 and 8, the present invention provides a technical solution: the utility model provides a blood virus detects and uses sample syringe needle, includes holds base 1, holds the top surface of base 1 and is provided with syringe needle 11, the bottom that holds base 1 is provided with disinfection wiper, and holds the bottom that holds base 1 and be provided with the sealing member, and the sealing member covers the protection to disinfection wiper, holds the top surface that holds base 1 and is provided with enclosure frame 12, and the surface of enclosure frame 12 is provided with roof 13, and the surface activity grafting of roof 13 has flexible needle protection spare, and is enclosed to syringe needle 11 top, and the top of enclosure frame 12 is provided with dismantlement formula closing mechanism for protecting flexible needle protection; the bottom of the containing base 1 is additionally provided with the hidden and contained disinfection wiping piece, and the disinfection wiping piece is matched with the sampling needle head, so that a sterilized object does not need to be specially matched, and the sampling efficiency is improved; and the top end of the sampling needle is provided with a telescopic needle protection piece which is rebounded after being pressed down, so that the needle is protected, and articles and operators are prevented from being scratched by the needle.

Example two

Referring to fig. 2, 5 and 7, in order to realize hidden storage of alcohol-soaked cotton balls 2, the accommodating base 1 is in a square frame structure, the disinfection wiper comprises alcohol-soaked cotton balls 2, the alcohol-soaked cotton balls 2 are fixed on the top surface of a groove of the accommodating base 1, the thickness of the alcohol-soaked cotton balls 2 is larger than the depth of the groove of the accommodating base 1, the sealing member is used for storing the alcohol-soaked cotton balls 2 in the groove of the accommodating base 1, the sealing member comprises a sealing plate 3, a butt joint inserting piece 4, an edge groove 5, an introducing inserting handle 6, a clamping inserting handle 7, an elastic hoop plate 8, a rubber gasket 9 and a sealing gasket 10, the sealing gasket 10 is in an annular plate structure, the sealing gasket 10 is fixed on the bottom surface of the accommodating base 1, the inner ring opening size of the sealing gasket 10 is larger than the groove opening size of the accommodating base 1, the sealing plate 3 is positioned at the bottom end of the accommodating base 1, the sealing plate 3 is used for extruding the sealing gasket 10, two groups of butt joints 4 are respectively fixed on the surface of the sealing plate 3, the edge grooves 5 and the inserting piece 4 are in the opposite joint grooves 5 and the edge grooves 5 are formed in the side walls of the accommodating base 1; the fixed surface of limit groove 5 has elasticity hoop board 8, elasticity hoop board 8 is "C" font platy structure, screens insert handle 7 and peg graft in the interior ring mouth of elasticity hoop board 8, screens insert handle 7 and be cylindrical structure, the one end of leading-in insert handle 6 is fixed on the surface of screens insert handle 7, the other end of leading-in insert handle 6 is fixed on the surface of butt joint inserted sheet 4, rubber gasket 9 is provided with two sets of, two sets of rubber gasket 9 are with holding base 1 symmetric distribution, and rubber gasket 9 and limit groove 5 are alternately distributed around holding base 1, and the one side that rubber gasket 9 kept away from holding base 1 is provided with convex curved surface.

Example III

Referring to fig. 9 and 10, in order to realize the telescopic movement of the telescopic sheath 15, on the basis of the second embodiment, the top plate 13 is fixed in the top notch of the enclosure frame 12, the top surface of the top plate 13 is flush with the top surface of the enclosure frame 12, the telescopic needle guard is centered on the surface of the top plate 13, the telescopic needle guard comprises a through hole 14, a telescopic sheath 15, a mounting groove 16, a bifurcation groove 17, an elastic rubber ring 18, an elastic rubber traction belt 19, a baffle plate 26 and a slope plate 27, the through hole 14 is formed on the surface of the top plate 13, the telescopic sheath 15 is movably inserted in the through hole 14, the baffle plate 26 is square, a plurality of baffle plates 26 are arranged and distributed along the side wall of the digging groove 25, the baffle plate 26 limits the telescopic sheath 15, the telescopic sheath 15 cannot be pulled away from the through hole 14, the slope plate 27 is fixed on the surface of the baffle plate 26, the slope board 27 and the baffle 26 incline, the mounting groove 16 is arranged on the bottom surface of the telescopic sheath 15, the mounting groove 16 is an annular groove, the inner ring caliber of the mounting groove 16 is larger than the inner ring caliber of the telescopic sheath 15, the top end of the needle 11 penetrates through the inner ring opening of the telescopic sheath 15, the bifurcation groove 17 is arranged on the bottom surface of the telescopic sheath 15, the bifurcation groove 17 and the mounting groove 16 penetrate through, the bifurcation groove 17 is provided with four bifurcation grooves 17, the four bifurcation grooves 17 are distributed in a cross arrangement, the elastic rubber ring 18 is of an annular plate structure, the elastic rubber ring 18 is fixed on the surface of the mounting groove 16, the elastic rubber traction belt 19 corresponds to the bifurcation groove 17 one by one, one end of the elastic rubber traction belt 19 is integrally formed on the surface of the elastic rubber ring 18, one end of the elastic rubber traction belt 19 stretches into the bifurcation groove 17, and the other end of the elastic rubber traction belt 19 is fixed on the bottom surface of the top plate 13.

Example IV

Referring to fig. 4, on the basis of the third embodiment, in order to realize protection of the telescopic sheath 15, the detachable cover mechanism includes a limit frame 20, a cover 21, a positioning insert rod 22, a positioning hole 23, an elastic rubber ball 24 and a digging groove 25, the limit frame 20 is in an annular plate structure, the limit frame 20 is fixed on the top surface of the enclosure frame 12, the cover 21 is in a square frame structure, the cover 21 is movably inserted into an inner annular opening of the limit frame 20, after the limit frame 20 contacts the top surface of the enclosure frame 12, a gap is reserved between the top end of the telescopic sheath 15 and the top plate of the cover 21, a plurality of positioning holes 23 are formed in the surface of the top plate 13, the positioning insert rods 22 and the positioning holes 23 are in one-to-one correspondence, the positioning insert rods 22 are movably inserted into the positioning holes 23, one end of the positioning insert rods 22 is fixedly connected with the elastic rubber ball 24, the diameter of the elastic rubber ball 24 is larger than the aperture of the positioning hole 23, the other end of the positioning insert rod 22 is fixed on the bottom plate bottom surface of the cover 21, and the bottom surface of the cover 21 is in overlap joint with the top plate of the elastic rubber ball 24 when the top surface of the enclosure frame 12 contacts the top surface of the enclosure frame 12.

When the sampling needle is actually used, two groups of rubber gaskets 9 are respectively pinched by two fingers of one hand, the butt joint inserting piece 4 is pulled down by the two fingers of the other hand, the butt joint inserting piece 4 pulls the clamping inserting handle 7 away from the elastic hoop plate 8 through the guiding inserting handle 6, at the moment, the sealing plate 3 is removed from the bottom of the accommodating base 1, the extruded alcohol-soaked cotton balls 2 rebound to extend out of the notch of the accommodating base 1, and the hand pinching guard frame 12 wipes and disinfects the alcohol-soaked cotton balls 2 towards the fingers required to be sampled by a patient; then the finger is scratched and is extracted closing cap 21 in the groove 25 of scratching and demolish from the top of enclosing frame 12, in this process, closing cap 21 is taken out elasticity rubber ball 24 from locating hole 23 through location inserted bar 22, flexible sheath 15 leaks this moment, the finger that needs the sample with flexible sheath 15 towards the patient, when pushing down enclosing frame 12, flexible sheath 15 moves to enclosing frame 12 inside, flexible sheath 15 stretch multiunit elasticity rubber traction belt 19 this moment, after flexible sheath 15 contracts into enclosing frame 12, the tip of syringe needle 11 exposes and pricks on patient's finger, with enclosing frame 12 from patient's finger lift-off back, elasticity rubber traction belt 19 kick-back pushes away flexible sheath 15 rebound and resets, the tip of syringe needle 11 is protected by flexible sheath 15 this moment.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a virus detects with sample syringe needle in blood, is provided with syringe needle (11), its characterized in that including dress flourishing base (1), the top surface of dress flourishing base (1): the bottom of dress Cheng De (1) is provided with disinfection wiper, and the bottom of dress flourishing base (1) is provided with the sealing member, and the sealing member covers the protection to the disinfection wiper, and the top surface of dress flourishing base (1) is provided with enclosure frame (12), and the surface of enclosure frame (12) is provided with roof (13), and the surface activity of roof (13) is pegged graft has flexible needle protection spare, and is enclosed on syringe needle (11) top, and the top of enclosure frame (12) is provided with dismantlement formula closing cap mechanism for protect flexible needle protection spare.

2. A sampling needle for detecting viruses in blood as claimed in claim 1, wherein: the disinfection wiper comprises an alcohol-soaked cotton ball (2), wherein the alcohol-soaked cotton ball (2) is fixed on the top surface of a groove body for containing the base (1), the thickness of the alcohol-soaked cotton ball (2) is larger than the depth of the groove body for containing Cheng De (1), and the sealing element extrudes the alcohol-soaked cotton ball (2) into the groove body for containing the base (1) to be contained.

3. A sampling needle for detecting viruses in blood as claimed in claim 1, wherein: sealing member includes shrouding (3), butt joint inserted sheet (4), limit groove (5), leading-in inserted handle (6), screens inserted handle (7), elasticity hoop board (8), rubber gasket (9) and sealed backing ring (10), sealed backing ring (10) are annular platelike structure, sealed backing ring (10) are fixed in the bottom surface of dress flourishing base (1), the interior ring mouth size of sealed backing ring (10) is greater than the notch size of dress Cheng De (1), shrouding (3) are in the bottom of dress flourishing base (1) and shrouding (3) extrusion sealed backing ring (10), butt joint inserted sheet (4) are provided with two sets of, two sets of butt joint inserted sheets (4) are all fixed on the surface of shrouding (3), and limit groove (5) and butt joint inserted sheet (4) one-to-one, limit groove (5) are seted up on the lateral wall of dress flourishing base (1), and butt joint inserted sheet (4) activity are pegged graft in limit groove (5).

4. A sampling needle for detecting viruses in blood as claimed in claim 3, wherein: the surface mounting of limit groove (5) has elasticity hoop board (8), elasticity hoop board (8) are "C" font platy structure, screens insert handle (7) and peg graft in the inner ring mouth of elasticity hoop board (8), screens insert handle (7) and be cylindrical structure, the one end of leading-in insert handle (6) is fixed on the surface of screens insert handle (7), the other end of leading-in insert handle (6) is fixed on the surface of butt joint inserted sheet (4), rubber gasket (9) are provided with two sets of, two sets of rubber gasket (9) are with holding base (1) symmetric distribution, and rubber gasket (9) and limit groove (5) are along holding the alternate distribution of holding base (1) all around, and the one side that holds base (1) is kept away from to rubber gasket (9) is provided with convex curved surface.

5. A sampling needle for detecting viruses in blood as claimed in claim 1, wherein: the top plate (13) is fixed in a notch at the top of the enclosure frame (12), the top surface of the top plate (13) is flush with the top surface of the enclosure frame (12), and the telescopic needle protection piece is centered on the surface of the top plate (13).

6. A sampling needle for detecting viruses in blood as claimed in claim 1, wherein: the telescopic needle protection piece comprises a penetrating opening (14), a telescopic sheath (15), a mounting groove (16), a bifurcation groove (17), an elastic rubber ring (18), an elastic rubber traction belt (19), a baffle plate (26) and a slope plate (27), wherein the penetrating opening (14) is formed in the surface of a top plate (13), the telescopic sheath (15) is movably inserted into the penetrating opening (14), the baffle plate (26) is a square sheet, the baffle plate (26) is provided with a plurality of baffle plates (26) which are distributed along the side wall of the digging groove (25), the baffle plate (26) is limited to the telescopic sheath (15), the telescopic sheath (15) cannot be pulled away from the penetrating opening (14), the slope plate (27) is fixed on the surface of the baffle plate (26), and the slope plate (27) and the baffle plate (26) incline.

7. The needle for detecting a virus in blood according to claim 6, wherein: the utility model discloses a telescopic needle, including flexible sheath (15) and branch groove (17), mounting groove (16) are offered in the bottom surface of flexible sheath (15), and mounting groove (16) are the ring channel, and the inner ring bore of mounting groove (16) is greater than the inner ring bore of flexible sheath (15), and the inner ring mouth of flexible sheath (15) is run through on the top of syringe needle (11), and branch groove (17) are offered in the bottom surface of flexible sheath (15), and branch groove (17) and mounting groove (16) link up, and branch groove (17) are provided with four, and four branch groove (17) are "ten" font and arrange and distribute.

8. A sampling needle for detecting viruses in blood as claimed in claim 7, wherein: the elastic rubber ring (18) is of an annular plate-shaped structure, the elastic rubber ring (18) is fixed on the surface of the mounting groove (16), the elastic rubber traction belts (19) and the bifurcation grooves (17) are in one-to-one correspondence, one end of each elastic rubber traction belt (19) is integrally formed on the surface of the elastic rubber ring (18), one end of each elastic rubber traction belt (19) extends into each bifurcation groove (17), and the other end of each elastic rubber traction belt (19) is fixed on the bottom surface of the top plate (13).

9. A sampling needle for detecting viruses in blood as claimed in claim 1, wherein: the detachable sealing cover mechanism comprises a limiting frame (20), a sealing cover (21), a positioning inserting rod (22), a positioning hole (23), an elastic rubber ball (24) and a digging groove (25), wherein the limiting frame (20) is of an annular plate-shaped structure, the limiting frame (20) is fixed on the top surface of the enclosure frame (12), the sealing cover (21) is of a square frame body structure, the sealing cover (21) is movably inserted into an inner ring opening of the limiting frame (20), and after the limiting frame (20) contacts the top surface of the enclosure frame (12), a gap is reserved between the top end of the telescopic sheath (15) and the top plate of the sealing cover (21).

10. A sampling needle for detecting viruses in blood as claimed in claim 9 wherein: the locating holes (23) are formed in a plurality of positions, the locating holes (23) are formed in the surface of the top plate (13), the locating inserting rods (22) are in one-to-one correspondence with the locating holes (23), the locating inserting rods (22) are movably inserted into the locating holes (23), one ends of the locating inserting rods (22) are fixedly connected with elastic rubber balls (24), the diameters of the elastic rubber balls (24) are larger than the diameters of the locating holes (23), the other ends of the locating inserting rods (22) are fixed on the bottom surface of the top plate of the sealing cover (21), and when the bottom surface of the sealing cover (21) is overlapped on the top surface of the enclosure frame (12), the elastic rubber balls (24) are located below the locating holes (23).