A shielding structure for a magnetic head

Abstract

The present invention relates to a shielding structure for a magnetic head, comprising a magnetic head body located within a shielding box, wherein one end of the magnetic head body extends outside the shielding box, the shielding box comprising an inner box and an outer box, wherein a receiving cavity is formed between the inner box and the outer box, wherein a spring I connecting the inner box and the outer box is provided in the receiving cavity, and grooves are provided on the inner walls on both sides of the opening end of the outer box, wherein the ends of the grooves near the opening of the outer box are recessed outwardly with arched portions, and a sealing plate is provided in the grooves, wherein mounting ears are provided on both sides of one end of the sealing plate and extend into the opening of the arched portions, wherein a rotating shaft passing through two corresponding sets of mounting ears is provided in the arched portions, and a rectangular notch is provided on the surface of the other end of the sealing plate opposite to the mounting ears, wherein a slide groove with an isosceles trapezoidal cross-section is provided along the length direction of the inner bottom wall of the notch, and a connecting plate is provided in the notch, and a slider is provided on the connecting plate and adapted to fit within the slide groove. The present invention has a simple structure and is easy to use.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic heads, and in particular to a shielding structure of a magnetic head. Background Art

[0002] When the magnetic head of a money counter is working, if it is affected by the surrounding electromagnetic field, it is easy to have inaccurate scanning. Therefore, a shielding layer is usually wrapped around the outside of the magnetic head body to ensure the accuracy of the scanning of the magnetic head body.

[0003] The existing shielding structure of the magnetic head of a banknote counter is not convenient to replace after installation. Secondly, it cannot provide complete protection when not in use. For example, a shielding structure of the magnetic head of a banknote counter with patent number CN213211147U solves the above problems, but has the following defects, such as: after the magnetic head body passes through the shielding box, the two sets of baffle plates are located on both sides of the shielding box, so that it is in an open state, which makes it easy to affect the normal use of the equipment or components around the shielding box. Under the force of the spring stretching to push the magnetic head body toward the opening of the shielding box, the two sets of baffle plates are easily compressed and separated, which makes it unable to seal the opening of the shielding box to achieve the purpose of protecting the magnetic head body. Summary of the Invention

[0004] The object of the present invention is to provide a shielding structure for a magnetic head.

[0005] The technical problems of the present invention are mainly solved by the following technical solutions:

[0006] A magnetic head shielding structure includes a shielding box and a magnetic head body located inside the shielding box, wherein one end of the magnetic head body extends outside the shielding box:

[0007] The shielding box includes an inner box for fixing the magnetic head body and an outer box sleeved on the inner box, wherein a accommodating cavity is formed between the inner box and the outer box, wherein a spring I is provided in the accommodating cavity to connect the inner box and the outer box, and grooves are provided on the inner walls on both sides of the open end of the outer box, wherein the end of the groove close to the opening of the outer box is recessed outwardly with an arched portion, and a sealing plate is provided in the groove to extend to the opening of the arched portion, wherein mounting ears are provided on both sides of one end of the sealing plate and extend into the opening of the arched portion, wherein a rotating shaft passing through the corresponding two groups of mounting ears is provided in the arched portion, and a rectangular notch is provided on the surface of the other end of the sealing plate opposite to the position of the mounting ear, wherein a sliding groove with an isosceles trapezoidal cross-section is provided on the inner bottom wall of the notch along its length direction, and a connecting plate is also provided in the notch, and a slider located in the sliding groove and adapted therewith is provided on the connecting plate, wherein a connecting column is provided on the top of one group of connecting plates, and a connecting groove corresponding to the connecting column is provided on the top of the other group of connecting plates.

[0008] Preferably, the total length of the two sets of sealing plates is smaller than the length of the outer box opening, wherein the width of the sealing plates is adapted to the width of the outer box opening.

[0009] Preferably, a protrusion is provided on the outer side wall of the inner box, one end of which extends into the corresponding notch and contacts the side wall thereof, wherein the end face of the protrusion is in contact with the end face of the corresponding connecting plate.

[0010] Preferably, the inner box is provided with a receiving groove on both corresponding inner walls, wherein a rotating plate is obliquely provided in the receiving groove, and rotating shafts embedded in the side walls of the receiving groove are provided on both sides of the middle of the rotating plate, a pressure plate in contact with the end face of the magnetic head body is provided at one end of the rotating plate, wherein a bending plate is provided at the other end of the rotating plate, and a spring II connected to the corresponding side wall of the receiving groove is provided on the back of the bending plate, a rectangular frame is provided on the outer side of the open end of the inner box and is sleeved on the magnetic head body, wherein an extrusion rod that passes through the side wall of the inner box and extends into the receiving groove is provided at one end of the rectangular frame, and a nut is provided on the extrusion rod in the receiving groove, and the rectangular frame is located in the opening formed between the corresponding side wall of the outer box and the two sets of sealing plates.

[0011] Preferably, a movable groove with a major arc cross-section is provided on the back of the sealing plate, wherein an arc groove corresponding to the movable groove is provided on the outer wall of the inner box, and a sphere with one end extending into the arc groove is provided in the movable groove, and a spring III connected to the corresponding side wall of the movable groove is provided at one end of the sphere.

[0012] The beneficial effects of the present invention are as follows: when the magnetic head body is in use, the inner box will squeeze the sealing plate so that it is embedded in the groove; when the magnetic head body is not in use, the rotating sealing plate and the connecting plate will seal the bottom opening of the outer box, thereby sealing the magnetic head body in the outer box for protection, so that the sealing plate and the connecting plate will not protrude from the outside of the shielding box regardless of whether they are in use or not, thereby preventing them from interfering with the normal use of other components outside the shielding box; and because the arched portion presses against the sealing plate and the sealing plate presses against the magnetic head body, it can effectively prevent the magnetic head body from squeezing the sealing plate, causing the bottom opening of the outer box to open, and ultimately affecting the safety of the magnetic head body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of the present invention in use;

[0015] Figure 3 It is a structural diagram of the present invention in another state;

[0016] Figure 4 yes Figure 3 Enlarged view of point C in the middle;

[0017] Figure 5 is a cross-sectional view of the connecting plate of the present invention;

[0018] Figure 6 It is a schematic diagram of the structure between two sets of connecting plates in the present invention;

[0019] Figure 7 yes Figure 6 Bottom view of

[0020] Figure 8 yes Figure 1 Enlarged view of point A in the middle;

[0021] Figure 9 yes Figure 1 Enlarged view of point B in the middle;

[0022] Figure 10 yes Figure 9 Schematic diagram of the structure in another state.

[0023] In the figure: 1, shielding box, 101, inner box, 102, outer box, 2, head body, 3, accommodating chamber, 4, spring I, 5, groove, 6, arched portion, 7, sealing plate, 8, mounting ear, 9, rotating shaft, 10, notch, 11, slide groove, 12, connecting plate, 13, slider, 14, connecting column, 15, connecting groove, 16, protrusion, 17, accommodating groove, 18, rotating plate, 19, rotating shaft, 20, pressure plate, 21, bending plate, 22, spring II, 23, rectangular frame, 24, extrusion rod, 25, nut, 26, movable groove, 27, arc groove, 28, sphere, 29, spring III. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0025] A magnetic head shielding structure includes a shielding box 1 and a magnetic head body 2 located inside the shielding box, wherein one end of the magnetic head body 2 extends to the outside of the shielding box 1:

[0026] The shielding box 1 includes an inner box 101 for fixing the magnetic head body 2 and an outer box 102 which is sleeved on the inner box 101, wherein an accommodating cavity 3 is formed between the inner box 101 and the outer box 102, wherein a spring 14 is provided in the accommodating cavity 3 for connecting the inner box 101 and the outer box 102, and grooves 5 are provided on the inner walls on both sides of the opening end of the outer box 101, wherein the groove 5 close to the opening of the outer box 102 is provided. An arched portion 6 is recessed outward at the end, and a sealing plate 7 is provided in the groove 5 with one end extending to the opening of the arched portion 6. Mounting ears 8 extending into the opening of the arched portion 6 are provided on both sides of one end of the sealing plate 7, wherein a rotating shaft 9 passing through the corresponding two groups of mounting ears 8 is provided in the arched portion 6, and a rectangular notch 10 is provided on the surface of the other end of the sealing plate 7 at a position opposite to the mounting ear 8, wherein a slide groove 11 with an isosceles trapezoidal cross-section is provided on the bottom wall of the notch 10 along its length direction, and a connecting plate 12 is also provided in the notch 10, and a slider 13 is provided on the connecting plate 12 and is adapted to the slide groove 11, wherein a connecting column 14 is provided on the top of one group of connecting plates 12, and a connecting groove 15 corresponding to the connecting column 14 is provided on the top of the other group of connecting plates 12.

[0027] In this embodiment, the total length of the two sets of sealing plates 7 is smaller than the length of the opening of the outer box 102 , and the width of the sealing plates 7 is adapted to the width of the opening of the outer box 102 .

[0028] The outer wall of the inner box 101 is provided with a flexible protrusion 16 with one end extending into the corresponding notch 10 and contacting the side wall thereof, wherein the end surface of the protrusion 16 is in contact with the end surface of the corresponding connecting plate 12 .

[0029] The present invention improves the shielding performance of the magnetic head body 2 by using a double-layer shielding box 1 composed of an inner box 101 and an outer box 102. When the magnetic head body 2 needs to be placed in the shielding box 1 to prevent it from contacting with foreign objects, thereby improving its safety, the magnetic head body 2 can be squeezed to drive the inner box 101 to slide completely into the accommodating cavity 3 while squeezing the spring 14 to shrink it, as shown in Figure 2. Then, when the squeezing of the inner box 101 is lost, the upper suspended end of the sealing plate 7 will drive the mounting ear 8 to rotate around the rotating shaft 9 under the influence of gravity, so that it slides downward from the groove 5 to the bottom opening of the outer box 102, as shown in Figure 2. Figure 3As shown, after rotating downward 90 degrees, one end of the sealing plate 7 will rotate into the opening of the arched portion 6. At this time, under the influence of the side wall of the arched portion 6, it can effectively prevent the sealing plate 7 from continuing to rotate downward, so that the two groups of sealing plates 7 will block the bottom opening of the outer box 102. Since there is a large gap between the two groups of sealing plates 7 at this time, the rod-shaped tool or finger used to press the head body 2 at the middle of the opening of the outer box 102 will not affect the rotation of the sealing plate 7. Then the head body 2 is released, so that the spring I4 stretches and pushes the inner box 101 and the head body 2 downward and contacts the top surface of the sealing plate 7 at this time, so as to achieve the effect of the arched portion 6 pressing the sealing plate 7 and the sealing plate 7 pressing the head body 2 to prevent it from sliding out from the bottom opening of the outer box 102, thereby preventing it from being exposed to the outside and improving the safety of the head body 2.

[0030] At the same time, the connecting plate 12 is moved to drive the slider 13 to slide in the slide groove 11, so that the connecting plate 12 slides in the notch 10, thereby reducing the distance between the two groups of connecting plates 12, and allowing the connecting column 14 to be inserted into the connecting groove 15, thereby movably fixing the two groups of connecting plates 12, and finally achieving the sealing of the opening between the two groups of sealing plates 7 through the two groups of connecting plates 12, thereby protecting the head body 2 in the outer box 102 to improve its safety.

[0031] When the magnetic head body 2 needs to be exposed from the bottom opening of the outer box 101 for use, the steps are opposite to the above method. Figure 1 As shown, when the magnetic head body 2 is in use, the inner box 101 will press the sealing plate 7 to make it embed into the groove 5, as shown in FIG. Figure 3 As shown, the rotated sealing plate 7 and the connecting plate 12 seal the bottom opening of the outer box 102, and then seal the magnetic head body 2 in the outer box 102 for protection, so that the sealing plate 7 and the connecting plate 12 will not protrude from the outside of the shielding box 1 regardless of whether they are in use or not, and thus will not interfere with the normal use of other components outside the shielding box 1. Due to the influence of the arched portion 6 pressing against the sealing plate 7 and the sealing plate 7 pressing against the magnetic head body 2, the magnetic head body 2 can be effectively prevented from squeezing the sealing plate 7, which will cause the bottom opening of the outer box 101 to open, and ultimately affect the safety of the magnetic head body 2.

[0032] The notch 10 presses against the protrusion 16 and the spring 14 pulls, so that the inner box 101 will not drive the head body 2 to slide out from the bottom opening of the outer box 102. When the inner box 101 drives the head body 2 to slide completely into the accommodating cavity 3, the flexible protrusion 16 is deformed after being compressed and can effectively slide from the end surface of the connecting plate 12 into the accommodating cavity 3.

[0033] like Figure 3As shown, the isosceles trapezoidal chute 11 and the fixed sliding block 13 have an influence on the inclined wall, which can effectively prevent the suspended connecting plate 12 from falling downward from the notch 10 .

[0034] A movable groove 26 with a major arc cross-section is provided on the back of the sealing plate 7, wherein an arc-shaped groove 27 corresponding to the movable groove 26 is provided on the outer wall of the inner box 101, and a sphere 28 with one end extending into the arc-shaped groove 27 is provided in the movable groove 26, and a spring III29 connected to the corresponding side wall of the movable groove 26 is provided at one end of the sphere 28.

[0035] The spring III29 is stretched to push the ball 28 in the movable groove 26 to slide and embed into the arc groove 27, thereby movably fixing the inner box 101 at the specified position in the outer box 102, so as to prevent the inner box 101 from driving the head body 2 to slide out from the bottom opening of the outer box 102. When the inner box 101 drives the head body 2 to slide completely into the accommodating cavity 3, the ball 28 is squeezed by the side wall of the moving inner box 101, and the spring III29 contracts and causes the ball 28 to slide out from the arc groove 27, preventing it from interfering with the inner box 101 sliding into the accommodating cavity 3.

[0036] The inner box 101 is provided with a receiving groove 17 on the two corresponding inner walls, wherein a rotating plate 18 is obliquely arranged in the receiving groove 17, and a rotating shaft 19 embedded in the side walls of the receiving groove 17 is provided on both sides of the middle of the rotating plate 18, and a pressure plate 20 in contact with the end face of the magnetic head body 2 is provided at one end of the rotating plate 18, wherein a bending plate 21 is provided at the other end of the rotating plate 18, and a spring II22 connected to the corresponding side wall of the receiving groove 17 is provided on the back of the bending plate 21, and a rectangular frame 23 is provided on the outer side of the open end of the inner box 101, which is sleeved on the magnetic head body 2, wherein one end of the rectangular frame 23 is provided with an extrusion rod 24 that penetrates the side wall of the inner box 101 and extends into the receiving groove 17, and a nut 25 is sleeved on the extrusion rod 24 in the receiving groove 17, and the rectangular frame 23 is located in the opening formed between the corresponding side wall of the outer box 101 and the two groups of sealing plates 7.

[0037] When it is necessary to install the magnetic head main body 2 in the inner box 101, as shown in FIG. Figure 10 As shown, it is only necessary to squeeze the rectangular frame 23 so that the squeezing rod 24 squeezes the bending plate 21, wherein the bending plate 21 squeezes the spring II22 to make it contract, and at the same time the bending plate 21 drives the rotating plate 18 to rotate with the rotating axis 19 as the center, thereby driving the pressure plate 20 to completely slide into the accommodating groove 17, so that the head body 2 is placed in the inner box 101. Then release the squeezing rod 24, the spring II22 stretches and pushes the bending plate 21 to move, thereby driving the rotating plate 18 to rotate with the rotating axis 19 as the center, thereby driving the pressure plate 20 to slide out of the accommodating groove 17 and squeeze and lock the head body 2. The working steps for removing the head body 2 are opposite to its installation steps.

[0038] The present invention has been described in detail above, but the contents described are only preferred embodiments of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A magnetic head shielding structure, comprising a shielding box and a magnetic head body located inside the shielding box, wherein one end of the magnetic head body extends outside the shielding box, characterized in that: The lockhole that is formed on the upper end of the lifting plug is formed on the upper end of the lifting plug, and the lockhole that is formed on the upper end of the lifting plug is formed. The inner box is provided with a receiving groove on the two corresponding inner walls, wherein a rotating plate is obliquely arranged in the receiving groove, and rotating shafts embedded in the side walls of the receiving groove are provided on both sides of the middle of the rotating plate. A pressure plate in contact with the end face of the magnetic head body is provided at one end of the rotating plate, wherein a bending plate is provided at the other end of the rotating plate, and a spring II connected to the corresponding side wall of the receiving groove is provided on the back of the bending plate. A rectangular frame is provided on the outer side of the open end of the inner box and is sleeved on the magnetic head body, wherein an extrusion rod that passes through the side wall of the inner box and extends into the receiving groove is provided at one end of the rectangular frame, and a nut is sleeved on the extrusion rod in the receiving groove. The rectangular frame is located in the opening formed between the corresponding side wall of the outer box and the two sets of sealing plates.

2. The magnetic head shield structure according to claim 1, wherein: The total length of the two sets of sealing plates is less than the length of the outer box opening, and the width of the sealing plates is adapted to the width of the outer box opening.

3. The magnetic head shield structure according to claim 1, wherein: The outer wall of the inner box is provided with a protrusion with one end extending into the corresponding notch and contacting the side wall thereof, wherein the end surface of the protrusion is in contact with the end surface of the corresponding connecting plate.

4. The magnetic head shield structure according to claim 1, wherein: A movable groove with a major arc cross-section is provided on the back of the sealing plate, wherein an arc groove corresponding to the movable groove is provided on the outer wall of the inner box, and a sphere with one end extending into the arc groove is provided in the movable groove, and a spring III connected to the corresponding side wall of the movable groove is provided at one end of the sphere.

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