Sealing device of point pressure type adaptive individualized mask

Abstract

The present invention provides a sealing device for a point-pressure type adaptive individualized mask, which is composed of a finger pressing assembly, a center warp, an oblique warp A, a weft warp, an oblique warp B, a lace elastic assembly, a right lace, a left lace, a round frame and a finger pressing frame. The sealing device provided by the present invention is an auxiliary sealing device specifically for disposable masks and other wearing equipment. The device can solve the defects existing in the prior art, and can be reused and sterilized by gas (or irradiation), as a supplement and improvement to the disposable masks currently widely used. The point-pressure spring assembly of the present invention can realize pressurized sealing of key points on the face, the lace elastic assembly can realize single-handed operation of the lace elastic adjustment, and the one-way locking principle of the ratchet can realize the lace being kept in a tight state at all times in a natural state, thereby solving the sealing problem of special-shaped facial structures such as the bridge of the nose and the wing of the nose. The present invention has a reasonable structural design, the entire adjustment device is ingeniously conceived, and the operation is convenient and effective.

Description

Technical Field

[0001] The present invention belongs to the field of protective equipment accessories, and relates to a point-pressure type adaptive individualized mask sealing device, which is a sealing device for masks such as masks, and is particularly useful for sealing special-shaped facial structures such as nose bridges and nose wings. Background Art

[0002] Disposable masks are made of more than three layers of 28g non-woven fabric; the bridge of the nose uses an environmentally friendly all-plastic strip. According to the protection level and material, they can be divided into ordinary disposable masks, medical disposable masks and medical surgical masks, etc. The size is about 17.5cmx9.5cm, and the straps are elastic and strap-on. They have the functions of anti-virus, anti-odor, bacteria filtration, dust prevention, etc., are easy to wear, comfortable, and low in cost, and are widely used in daily life and medical use. However, during use, it was found that they have the following defects: (1) The plastic strip at the bridge of the nose cannot be pressed against the skin; (2) The nose wing is not covered enough; (3) Glasses are easy to fog up, especially in winter; (4) The tension point is single: the facial structure is complex, and the tension point of the strap cannot be fully transmitted to the sealing interface of the mask; (5) The elastic tension is not adjustable: the head circumference of each person determines the tension of the elastic band; (6) The strap cannot provide continuous tension: the previously tied strap will loosen or become too tight and uncomfortable with the movement of the head and neck. Summary of the invention

[0003] The purpose of the present invention is to solve the defect of insufficient sealing of the current disposable masks, especially to solve the sealing problem of the special-shaped structures of the face such as the bridge of the nose and the nose wing, and provide a sealing device of a point-pressure type adaptive individualized mask. The device mainly adopts the principle of spring point pressure and one-way ratchet locking. The device is composed of a finger pressing component 1, a center warp 2, an oblique warp A3, a latitude warp 4, an oblique warp B5, a lace elastic component 6, a right lace 7, a left lace 8, a round frame 9 and a finger pressing frame 10. The whole device is approximately a hemispherical three-dimensional frame. The circular frame 9 is a skeleton of a three-quarter circular arc (i.e., an arc corresponding to an angle of 270 degrees), and the remaining quarter circular arc gap is formed by a finger pressing frame 10, which forms a 60-degree angle with the circular frame 9. The midpoint of the circular frame 9 arc emits a circular arc of the same diameter, the middle warp 2 intersects at the midpoint of the finger pressing frame 10, and the circular arc 6 of the circular frame 9 is divided into equal parts, and semicircular arcs of the same diameter are emitted at the equal division points, forming oblique warp A3, oblique warp B5 and latitude 4 respectively. Two finger pressing components 1 are equidistantly emitted on both sides of the midpoint of the finger pressing frame 10. The right lace 7 is connected to the right side of the circular frame 9, and is connected in series with the lace elastic component 6. The left lace 8 is connected to the left side of the circular frame 9, and is also connected in series with the lace elastic component 6. The left (right) lace is made of elastic material.

[0004] The finger pressing assembly 1 is a component issued from the finger pressing frame 10. The structure is composed of a pressure ball 37, a pressure column 38, a compression chamber 39, a stopper 40, a spring 41, a stopper window 42, a base 43, a base cover 44 and a holder 45. The middle of the base 43 is hollowed out into a cylindrical cavity as the compression chamber 39, and the base 43 has long strip-shaped stopper windows 42 on both sides thereof and communicates with the compression chamber 39, and the base 43 is capped at the rear as the base cover 44. The cylindrical pressure column 38 is deformed in the compression chamber 39, and the two sides of the finger pressing 38 located in the compression chamber 39 issue stops 40 and deform in the stopper windows 42, one end of the finger pressing 38 is connected to the pressure ball 37, and the other end is connected to the spring 41, and the other end of the spring 41 is against the base cover 44, and a holder 45 is provided on the bottom surface of the base 43, and the holder 45 is adapted to the finger pressing frame 10 and is used to fix the finger pressing assembly 1 to the finger pressing frame 10.

[0005] The lace elastic assembly 6 is a component connected in series on the right (left) lace, and is composed of a D ring 11, a ring seat 12, a bottom plate 13, an upper side plate 14, a tie hole 15, a hole plate 16, a lower side plate 17 and a slide lock assembly 18. The component is a hollow rectangular parallelepiped structure. The ring seat 12, the bottom plate 13, the upper side plate 14, the hole plate 16 and the lower side plate 17 together constitute the five faces of the rectangular parallelepiped, and the remaining face is hollowed out, and the slide lock assembly 18 is formed inside. The hole plate 16 is located at one end of the lace elastic assembly 6, and the tie hole 15 is opened on its surface. The ring seat 12 is located at the other end of the lace elastic assembly 6, and a semicircular D ring 11 is located in the middle of the left and right outer surfaces of the ring seat 12. The slide lock assembly 18 slides in the hollow rectangular parallelepiped structure.

[0006] The slide lock assembly 18 slides in the hollow structure of the main body, and the slide lock assembly 18 is composed of a handle 22, a stop block 23, a fork shaft 24, a handle rod 25, a handle rod shaft 26, a handle rod shaft seat 27, a card shaft 28, a card shaft seat 29, a slide seat 30, a card spring 31, a tie ring 32, a card 33, a connecting rod shaft seat 34, a connecting rod shaft 35 and a connecting rod 36. The four sides of the slide seat 30 of the sheet structure are free. The sheet shaft seat 29, the handle rod shaft seat 27 and the stop block 23 are provided on the upper surface of the slide seat 30; one end of the card 33 is connected to the slide seat 30 through the sheet shaft seat 29 with the card shaft 28 as the axis, and the connecting rod shaft seat 34 is provided on the upper surface of the other end of the card 33, and the card spring 31 is provided on the lower surface of the card 33, and the card spring 31 is fixed to the slide seat 30; one end of the handle rod 25 is connected to the slide seat 30 through the handle rod shaft seat 27 with the handle rod shaft 26 as the axis, and the other end is connected to the handle 22, the handle rod The fork shaft 24 is passed through the middle of both ends of 25; one end of the connecting rod 36 is connected to the card 33 through the connecting rod shaft seat 34 with the connecting rod shaft 35 as the axis, and the other end is forked and connected to the handle rod 25 with the fork shaft 24 as the axis; the stop block 23 is extended from the upper surface of the slide 30 and is close to the handle rod shaft seat 27; the end of the upper surface of the slide 30 close to the card spring 31 is extended with a tie ring 32; the two sides of the slide 30 are inserted into the grooves 21 of the upper side plate 14 and the lower side plate 17 to slide.

[0007] The lower side plate 17 constitutes the side of the main structure, and is composed of ratchet teeth 19, a plate body 20 and a slide groove 21. The plate body 20 is a rectangular parallelepiped. The ratchet teeth 19 on the upper protruding surface of the side of the plate body 20 form a ratchet bar, which is consistent with the length of the plate body 20. The lower concave portion of the side of the plate body 20 forms a slide groove 21, which is consistent with the length of the plate body 20. The upper side plate 14 constitutes the other side of the main structure, and its structure is the same as that of the lower side plate 17.

[0008] The present invention provides a sealing device for masks and other wearing equipment, which is an auxiliary sealing device specifically for disposable masks and other wearing equipment. The device can solve the defects of the prior art, and can be reused and steam sterilized, as a supplement and improvement to the disposable masks currently used in large quantities. The point pressure spring assembly of the present invention can achieve pressurized sealing of key points on the face; the lace elastic assembly can achieve single-handed operation of the lace elastic adjustment, and the one-way locking principle of the ratchet can achieve the lace being kept in a tight state at all times in a natural state, thereby solving the sealing problem of special-shaped facial structures such as the bridge of the nose and the wings of the nose. The present invention has a reasonable structural design, the entire adjustment device is ingeniously conceived, and the operation is convenient and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the present invention.

[0010] Figure 2 It is a front view schematic diagram of the present invention.

[0011] Figure 3 It is a side view schematic diagram of the present invention.

[0012] Figure 4 It is a rear view schematic diagram of the present invention.

[0013] Figure 5 It is a schematic diagram of the top view of the present invention.

[0014] Figure 6 2 is a schematic diagram of the structure of the finger pressing assembly 1.

[0015] Figure 7 2 is a schematic side view of the finger pressing assembly 1.

[0016] Figure 8 2 is a schematic diagram of a front view of the finger pressing assembly 1.

[0017] Fig. 9 It is a schematic structural diagram of the tension component 6.

[0018] Fig.10 2 is a schematic diagram of the rear view of the elastic component 6.

[0019] Fig.11 2 is a schematic diagram of the bottom surface of the elastic component 6.

[0020] Fig.12 2 is a schematic diagram of an exploded view of the tension component 6.

[0021] Fig.13 2 is a schematic diagram of the structure of the slide lock assembly 18.

[0022] Fig.14 1 is a side schematic view of the slide lock assembly 18.

[0023] Fig.15 17 is a schematic structural diagram of the lower side plate.

[0024] Fig.16 It is a schematic diagram of the connection between the slide 30 and the card 33 and the side plate.

[0025] Fig.17 It is a schematic diagram of the angle of the tooth surface of ratchet tooth 19.

[0026] Fig.18 It is a schematic diagram of the use of the lace elastic assembly 6.

[0027] Fig.19 It is a schematic diagram of the skeleton structure angle of the present invention. DETAILED DESCRIPTION

[0028] The present invention is further described in conjunction with the accompanying drawings and embodiments.

[0029] Example 1 Sealing device of point pressure type adaptive individualized mask

[0030] Reference Figure 1-5 , Fig.19 The device of the present invention is composed of a finger pressing assembly 1, a center warp 2, an oblique warp A3, a weft warp 4, an oblique warp B5, a lace elastic assembly 6, a right lace 7, a left lace 8, a circular frame 9 and a finger pressing frame 10. The entire device is approximately a hemispherical three-dimensional frame. Fig.19 The circular frame 9 of three-quarter arc (i.e., the arc corresponding to the angle of 270 degrees) and the finger pressing frame 10 of one-quarter arc (i.e., the arc corresponding to the angle of 90 degrees) form a closed loop, and the circular frame 9 is 60 degrees with the finger pressing frame 10. The midpoint of the circular frame 9 arc emits a circular arc of the same diameter, the middle warp 2 intersects at the midpoint of the finger pressing frame 10, and the circular frame 9 is divided into 6 equal parts, and semicircular arcs of the same diameter are emitted at the equal division points, forming oblique longitude A3, oblique longitude B5 and latitude 4 respectively. Two finger pressing assemblies 1 are equidistantly arranged on both sides of the midpoint of the finger pressing frame 10. The right lace 7 is connected to the right side of the circular frame 9, and is connected in series with a lace elastic assembly 6. The left lace 8 is connected to the left side of the circular frame 9, and is also connected in series with a lace elastic assembly 6. The left (right) lace is made of elastic material.

[0031] See also Figure 6-8The finger pressing assembly 1 is a component issued from the finger pressing frame 10, and is the leader of the fixed-point pressure application. The component is composed of a pressure ball 37, a pressure column 38, a compression chamber 39, a stopper 40, a spring 41, a stopper window 42, a base 43, a base cover 44 and a seat 45. The base 43 is hollowed out into a cylindrical cavity in the middle as the compression chamber 39, and the base 43 has long strip-shaped stopper windows 42 on both sides and communicates with the compression chamber 39, and the base 43 rear cover is the base cover 44. The cylindrical pressure column 38 is deformed in the compression chamber 39, and the pressure finger 38 located in the compression chamber 39 sends out stops 40 on both sides and deforms in the stopper window 42, and the pressure finger 38 located outside the compression chamber 39 is connected to the pressure ball 37 at one end, and the spring 41 is connected to the other end, and the other end of the spring 41 is against the base cover 44. Under the elastic force of the spring 41, the pressure column 38 always maintains downward elastic potential energy. The stopper 40 moves in the stopper window 42, ensuring that the displacement range of the pressure column 38 in the compression chamber 39 is consistent with the length of the stopper window 42. A socket 45 is provided on the bottom surface of the base 43, and the socket 45 is compatible with the pressure finger frame 10 for fixing the pressure finger assembly 1 on the pressure finger frame 10.

[0032] See also Figure 9-12 , the lace elastic component 6 is a component connected in series on the right (left) lace, which plays a role in adjusting the wearing pressure. This component mainly adopts the principle of ratchet locking, and is composed of a D ring 11, a ring seat 12, a bottom plate 13, an upper side plate 14, a tie hole 15, a hole plate 16, a lower side plate 17 and a slide lock component 18. The component is a hollow rectangular parallelepiped structure. The ring seat 12, the bottom plate 13, the upper side plate 14, the hole plate 16 and the lower side plate 17 constitute the five faces of the rectangular parallelepiped, and the remaining face is hollowed out, and the slide lock component 18 is arranged inside. The hole plate 16 is located at one end of the lace elastic component 6, and the hole 15 is opened on the surface of the hole plate 16 and runs through the entire layer. The ring seat 12 is located at the other end of the lace elastic component 6, and a semicircular D ring 11 is located in the middle of the left and right sides of the outer surface of the ring seat 12. The slide lock component 18 slides in the hollow rectangular parallelepiped structure.

[0033] Reference Fig.13 and Fig.14The slide lock assembly 18 slides in the hollow structure of the main body, and the slide lock assembly 18 is composed of a handle 22, a stop block 23, a fork shaft 24, a handle 25, a handle shaft 26, a handle shaft seat 27, a card shaft 28, a card shaft seat 29, a slide seat 30, a card spring 31, a tie ring 32, a card 33, a connecting rod shaft seat 34, a connecting rod shaft 35 and a connecting rod 36. The four sides of the slide seat 30 of the sheet structure are free. The upper surface of the slide 30 has a film shaft seat 29, a handle shaft seat 27 and a stop block 23; one end of the card 33 is connected to the slide 30 through the film shaft seat 29 with the card shaft 28 as the axis, and the upper surface of the other end of the card 33 has a connecting rod shaft seat 34, and the lower surface of the card 33 has a card spring 31, and the other end of the card spring 31 is against the slide 30; one end of the handle 25 is connected to the slide 30 through the handle shaft seat 27 with the handle shaft 26 as the axis, and the other end is connected to the handle 22. The fork shaft 24 is traversed through the middle of both ends of the handle 25; one end of the connecting rod 36 is connected to the card 33 through the connecting rod seat 34 with the connecting rod shaft 35 as the axis, and the other end of the connecting rod 36 is forked and connected to the handle 25 with the fork shaft 24 as the axis; the stop block 23 is issued from the upper surface of the slide 30 and is close to the handle shaft seat 27; the end of the upper surface of the slide 30 close to the card spring 31 is issued with a tie ring 32; the two sides of the slide 30 are inserted into the grooves 21 of the upper side plate 14 and the lower side plate 17 to slide. Push the handle 22, the handle 25 pushes the card 33 through the connecting rod 36, and the card 33 rotates with the card shaft 28 as the axis. The card spring 31 will keep the card 33 with elastic potential energy (always keep it in an upward state); the stop block 23 will limit the rotation angle of the handle 25, and the handle 25 can only rotate counterclockwise from the vertical position.

[0034] Reference Fig.15 , wherein the lower side plate 17 constitutes the side of the main structure, and is composed of ratchet teeth 19, a plate body 20 and a slide groove 21. The main structure is a rectangular plate body 20, and the upper protruding surface of the side of the plate body 20 emits ratchet teeth 19, which are consistent with the length of the plate body 20. The ratchet teeth 19 are unidirectional, that is, each tooth surface has an angle (see Fig.17 ), the angle between the small angle tooth surface in the positive direction (starting from the orifice plate 16) and the horizontal line is 30 degrees, and the angle between the right angle tooth surface in the reverse direction (starting from the ring seat 12) and the horizontal line is 90 degrees; the two side ends of the card 33 in the slide lock assembly 18 are in contact with the tooth surfaces of the ratchet teeth 19 of the upper side plate 14 and the lower side plate 17 (see Fig.16 ); the lower portion of the inner side surface of the plate 20 is concave to form a slide groove 21, and the same length as the plate 20, the side end of the slide 21 in the sliding seat 30 (participate in Fig.16 The upper side plate 14 constitutes the other side of the main structure, and has the same structure as the lower side plate 17. Fig.15 .

[0035] Example 2 Use of the sealing device of the point pressure type adaptive individualized mask

[0036] First wear a disposable mask normally, and then wear the device outside the mask.

[0037] Wearing process: Hold the device with one hand and cover it outside the disposable mask, press the finger frame 10 to the position of the nose bridge, and ensure that the frame of the device and the pressing ball 37 do not exceed the edge of the disposable mask. Use the other hand to hang the right and left straps 7 and 8 of the device to the rear edge of the auricle, and then operate the strap elastic assembly 6.

[0038] Reference Figure 9-18 , operate the lace tensioning assembly 6. For one-handed operation, the thumb applies force to the handle 22, and the index finger or other fingers apply force to the outside of the D-ring 11, and the two fingers make a closing motion. The handle 22 is pushed, and the stop block 23 will limit the rotation angle of the handle 25 toward the D-ring 11, that is, the handle 22 will not tip toward the D-ring 11, so as to provide a force point for the thumb. The card spring 31 will keep the card 33 with elastic potential energy, that is, the end edge of the card 33 will always remain in contact with the tooth surface of the ratchet 19. At this time, the tooth body angle in the positive direction is small, and the rotation direction of the card 33 is consistent with the sliding direction. The end edge of the card 33 will slide over the ratchet 19, and no locking will occur. The slide seat 30 will move along the slide groove 21 toward the D-ring 11, and the lace on the lace ring 32 will move closer to the D-ring 11. After letting go, the elasticity of the strap will pull the slide 30 to move in the opposite direction, and the end edge of the card 33 will abut against the ratchet 19. At this time, the angle of the tooth body in the opposite direction is larger, and the rotation direction of the card 33 is opposite to the sliding direction. The end edge of the card 33 will be stuck on the ratchet 19, resulting in a locking phenomenon. That is, the length of the strap will remain in a shortened state.

[0039] Reference Figure 6-8 , the finger pressing assembly 1 starts to work. As the length of the strap shortens, the pressure ball 37 contacts the outer edge of the mask, the pressure column 38 retreats under pressure, and the spring 41 releases its elastic force to apply pressure to the mask through the pressure ball 37. The edge of the mask that crosses the bridge of the nose gradually shrinks under the pressure of the multiple finger pressing assemblies 1 on both sides of the nose wing, and remains in a state of close contact with the skin. Under the action of tightening the strap, the arc-shaped notch frame 9 is further pressurized to the outer layer of the mask until it is close to the face.

[0040] Removal process: refer to Figure 9-18, first operate the lace tensioning assembly 6: one-handed operation, the thumb contacts the handle 22, the index finger is put into the D ring 11, the two fingers make an open and extended movement, the handle 22 is pushed, and the handle rod 25 pushes the card 33 through the connecting rod 36. As long as the force applied to the card 33 is greater than the friction force (that is, the friction force of the end edge of the card 33 in contact with the tooth surface in the opposite direction of the ratchet 19), the card 33 rotates, and the end edge of the card 33 exceeds the height of the ratchet 19, the locking force will disappear, and the slide 30 will move along the slide groove 21 toward the orifice plate 16, and the lace on the lace ring 32 will move closer to the orifice plate 16, that is, the length of the lace will be extended.

[0041] Reference Figure 6-8 , the finger pressing assembly 1 starts to work: as the length of the strap increases, the pressing ball 37 in contact with the outer edge of the mask begins to loosen, the elastic force released by the spring 41 gradually disappears, and the tight state of the nose bridge and other facial skin is released.

[0042] Finally, the left (right) frenulum 8 (7) is lifted and pinched to remove the device, and the device is placed in a disinfection room for disinfection to be used next time. The device can also be disposable.

Claims

1. A sealing device for a point-pressure adaptive personalized mask, used to cover the outside of a disposable mask, characterized in that: The finger pressing frame (1) is composed of a finger pressing component (1), a center warp (2), an oblique warp A (3), a weft warp (4), an oblique warp B (5), a lace elastic component (6), a right lace (7), a left lace (8), a circular frame (9) and a finger pressing frame (10). The circular frame (9) is a three-quarter circular arc skeleton, and the remaining quarter circular arc is the finger pressing frame (10). The finger pressing frame (10) forms an angle of 60 degrees with the circular frame (9). The midpoint of the circular arc of the circular frame (9) emits a circular arc center warp (2) of the same diameter, which intersects with the finger pressing frame. The midpoint of the circular frame (10) is formed by dividing the circular arc of the circular frame (9) into six equal parts, and semicircular arcs of the same diameter are emitted at the equal division points to form oblique longitude A (3), oblique longitude B (5) and latitude (4), respectively. Two pressing finger assemblies (1) are equidistantly emitted from both sides of the midpoint of the pressing finger frame (10), the right lace (7) is connected to the right side of the circular frame (9), and is connected in series with a lace elastic assembly (6), and the left lace (8) is connected to the left side of the circular frame (9), and is also connected in series with a lace elastic assembly (6); the pressing finger assembly (1 ) is composed of a pressure ball (37), a pressure column (38), a compression chamber (39), a stopper (40), a spring (41), a stopper window (42), a base (43), a base cover (44) and a holder (45). The base (43) is hollowed out in the middle to form a cylindrical cavity as the compression chamber (39). The base (43) has long stopper windows (42) on both sides thereof and communicate with the compression chamber (39). The top of the base (43) is sealed as the base cover (44). The cylindrical pressure column (38) is arranged in the compression chamber (39). ), the pressure column (38) is located in the compression chamber (39) and has stops (40) on both sides thereof and moves in the stop window (42), one end of the pressure column (38) is connected to the pressure ball (37), and the other end is connected to the spring (41), the other end of the spring (41) is against the base cover (44), and a holder (45) is provided on the bottom surface of the base (43); the holder (45) is adapted to the pressure finger frame (10) and is used to fix the pressure finger assembly (1) and the pressure finger frame (10); the right lace (7) and the left lace (8) are made of elastic material.

2. A sealing device for a point-pressure adaptive personalized mask according to claim 1, characterized in that: The lace elastic assembly (6) is composed of a D-ring (11), a ring seat (12), a bottom plate (13), an upper side plate (14), a tie hole (15), a hole plate (16), a lower side plate (17) and a slide lock assembly (18). The lace elastic assembly (6) is a hollow rectangular parallelepiped structure. The ring seat (12), the bottom plate (13), the upper side plate (14), the hole plate (16) and the lower side plate (17) together constitute five faces of the rectangular parallelepiped. The remaining face is hollowed out and has a slide lock assembly (18) inside. The hole plate (16) has a hole on the surface of the tie hole (15). A semicircular D-ring (11) is provided at the middle of the outer surface of the ring seat (12).

3. A sealing device for a point-pressure adaptive individualized mask according to claim 2, characterized in that: The lower side plate (17) is composed of ratchet teeth (19), a plate body (20) and a slide groove (21); the plate body (20) is a rectangular parallelepiped; the ratchet teeth (19) on the upper protruding surface of the side surface of the plate body (20) form a ratchet bar and are consistent in length with the plate body (20); the lower part of the side surface of the plate body (20) is concave to form a slide groove (21) and is consistent in length with the plate body (20).

4. The sealing device of a point pressure type adaptive individualized mask according to claim 2, characterized in that: The slide lock assembly (18) slides in the hollow structure of the lace tension assembly (6), and the slide lock assembly (18) is composed of a handle (22), a stop block (23), a fork shaft (24), a handle rod (25), a handle rod shaft (26), a handle rod shaft seat (27), a card shaft (28), a card shaft seat (29), a slide seat (30), a card spring (31), a tie ring (32), a card (33), a connecting rod shaft seat (34), a connecting rod shaft (35) and a connecting rod (36). The upper surface of the slide seat (30) extends a film shaft seat (29), a handle rod shaft seat (27) and a stop block (23), one end of the card (33) is rotatably connected to the slide seat (30) through the film shaft seat (29) with the card shaft (28) as the axis, the upper surface of the other end of the card (33) extends a connecting rod shaft seat (34), and the lower surface of the card (33) extends a card Spring (31), the card spring (31) is fixed to the slide (30), one end of the handle rod (25) is connected to the slide (30) through the handle rod shaft seat (27) with the handle rod shaft axis (26) as the axis, and the other end is connected to the handle (22), and the middle position of the two ends of the handle rod (25) is horizontally penetrated by the fork shaft (24), one end of the connecting rod (36) is connected to the card (33) through the connecting rod shaft seat (34), and the other end is forked and connected to the handle rod (25) with the fork shaft (24) as the axis, and the stop block (23) is issued from the upper surface of the slide (30) and is close to the handle rod shaft seat (27), and the upper surface end of the slide (30) close to one end of the card spring (31) issues a tie ring (32), and the two sides of the slide (30) are inserted into the slide grooves (21) of the upper side plate (14) and the lower side plate (17) to slide.

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