Compression mechanism and breast X-ray machine

Abstract

The present invention belongs to the technical field of medical equipment, and provides a compression mechanism and a breast X-ray machine having the compression mechanism, wherein the compression mechanism includes a compression plate, a mounting seat, and a first drive assembly, and further includes: a sliding seat, which is arranged on the mounting seat, and is slidably connected to the mounting seat, and can make reciprocating linear motion between a third position and a fourth position relative to the mounting seat in the longitudinal direction, wherein when it is in the third position, it is located on the upper side of the mounting seat, and when it is in the fourth position, it is located on the lower side of the mounting seat; and a second drive assembly, which is used to drive the sliding seat to make reciprocating linear motion between the third position and the fourth position; wherein the compression plate is arranged on the sliding seat. The compression mechanism and breast X-ray machine provided by the present invention have a simple structure and a reasonable design, and can still release the patient's breast in time when the breast X-ray machine has an emergency such as a power outage or a malfunction, thereby reducing the patient's pain time.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a compression mechanism and a breast X-ray machine. Background Art

[0002] Mammary X-ray machine, also known as molybdenum target X-ray machine, is mainly used for X-ray photography of female breasts. It is the basic breast examination and diagnosis equipment in gynecology departments and specialized hospitals. It can timely detect lumps and tiny calcification points in breast tissues. It can also be used for photography of non-metallic foreign bodies and other soft tissues such as hemangiomas. In order to improve the imaging effect of X-ray penetration, mammary X-ray machines are equipped with a compression mechanism for compressing the breast.

[0003] However, the compression mechanism in the prior art includes a mounting seat, a compression plate arranged on the mounting seat, and a driving assembly for driving the mounting seat to move up and down. When the mammary X-ray machine fails to drive the mounting seat up through the driving assembly to release the patient's breast due to power failure or damage, the pressure can only be released by the medical staff manually rotating the power source in the opposite direction. The pressure is not released in time, which increases the pain time of the patient. Summary of the invention

[0004] In view of the defects in the prior art, an object of the present invention is to provide a compression mechanism and a breast X-ray machine to solve or alleviate the above-mentioned problems or other problems existing in the prior art.

[0005] In order to achieve the above object, on the one hand, the present invention provides a compression mechanism, including a compression plate, a mounting seat and a first driving assembly for driving the mounting seat to move, and further comprising:

[0006] a sliding seat, which is disposed on the mounting seat and can move with the mounting seat, is slidably connected to the mounting seat, and can reciprocate linearly between a third position and a fourth position relative to the mounting seat in the longitudinal direction, wherein when it is in the third position, it is located on the upper side of the mounting seat, and when it is in the fourth position, it is located on the lower side of the mounting seat; and

[0007] a second driving assembly, used for driving the sliding seat to perform reciprocating linear motion between the third position and the fourth position;

[0008] Wherein, the compression plate is arranged on the sliding seat and can move together with the sliding seat.

[0009] Furthermore, the second driving component comprises:

[0010] A lead screw, which is rotatably connected to the mounting seat;

[0011] a nut, which is sleeved on the lead screw and fixedly connected to the sliding seat; and

[0012] A scroll torsion spring, which is arranged on the mounting seat, and whose two ends are respectively connected to the mounting seat and the lead screw;

[0013] When the scroll torsion spring releases pressure, the scroll torsion spring drives the lead screw to rotate in the opposite direction, so that the sliding seat moves from the fourth position to the third position;

[0014] The compression mechanism also includes a locking assembly, which has a locked state and an unlocked state. When the locking assembly is in the locked state, the locking assembly locks the screw or locks the sliding seat in the fourth position. When the locking assembly is in the unlocked state, the locking assembly releases the lock on the sliding seat or the screw.

[0015] Furthermore, the locking assembly comprises:

[0016] A locking hole, which is arranged on the sliding seat;

[0017] a locking block, which is disposed in the mounting seat and has a fifth position and a sixth position, wherein when the locking block is in the fifth position, the locking block is separated from the locking insertion hole so that the locking assembly is in an unlocked state, and when the locking block is in the sixth position, the locking block is inserted in the locking insertion hole so that the locking assembly is in a locked state; and

[0018] The first driving structure is used to drive the locking block to reciprocate between the fifth position and the sixth position.

[0019] Furthermore, the first driving structure includes:

[0020] A first elastic member, two ends of which are respectively connected to the locking block and the mounting seat, and in a natural state, has a tendency to move the locking block from the sixth position to the fifth position;

[0021] a permanent magnet fixedly embedded in an end of the locking block away from the locking hole; and

[0022] The electromagnet is fixedly arranged on the mounting seat, and when the electromagnet is energized, the magnetism of the side of the electromagnet opposite to the permanent magnet is the same.

[0023] Furthermore, a fixed electrode and a movable electrode are provided on the circuit of the electromagnet;

[0024] The movable electrode has a seventh position and an eighth position, wherein when the movable electrode is in the seventh position, the movable electrode is separated from the fixed electrode to disconnect the circuit of the electromagnet, and when the movable electrode is in the eighth position, the movable electrode and the fixed electrode are in contact with each other to connect the circuit of the electromagnet;

[0025] The locking assembly further includes a second driving structure, and the second driving structure is used to drive the movable electrode to perform reciprocating linear motion between the seventh position and the eighth position.

[0026] Further, the fixed electrode and the movable electrode are both arranged in the mounting seat;

[0027] The second driving structure comprises:

[0028] A second elastic member, two ends of which are respectively connected to the movable electrode and the mounting seat, and in a natural state, has a tendency to move the movable electrode from the eighth position to the seventh position;

[0029] a ball, which is disposed in the sliding seat and has a ninth position and a tenth position. When the ball is in the ninth position, the ball is retracted into the side wall of the sliding seat, and when the ball is in the tenth position, the ball protrudes out of the side wall of the sliding seat to drive the moving electrode from the seventh position to the eighth position; and

[0030] The third elastic member has two ends respectively in contact with the sliding seat and the ball, and in a natural state, has a tendency to move the ball from the ninth position to the tenth position.

[0031] On the other hand, the present invention further provides a breast X-ray machine, comprising any one of the compression mechanisms described above.

[0032] Beneficial effects of the present invention:

[0033] The compression mechanism and breast X-ray machine provided by the present invention are provided with a sliding seat and a second driving assembly driving the sliding seat to move. During normal use, the sliding seat is driven to the fourth position by the driving assembly. When it is necessary to clamp the patient's breast, the patient places the breast on the detection platform, and the first driving assembly drives the mounting seat to move downward from the first position to the second position with the sliding seat and the compression plate. Under the action of the compression plate and the detection platform, the purpose of clamping the patient's breast can be achieved. After the detection is completed, the first driving assembly drives the mounting seat to move upward from the second position to the first position with the sliding seat and the compression plate, so as to achieve the purpose of releasing the patient's breast. During the detection process, if the breast X-ray machine is unable to release the breast by driving the mounting seat from the second position to the first position due to sudden situations such as power failure or failure, the second driving assembly can drive the sliding seat to move upward from the fourth position to the third position with the compression plate, so as to achieve the purpose of releasing the patient's breast. There is no need to rotate the power source of the breast X-ray machine in the direction, and the operation is simple and convenient to use, which reduces the pain time of the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0035] Figure 1 A three-dimensional view of a compression mechanism provided by an embodiment of the present invention;

[0036] Figure 2 for Figure 1 A cross-sectional view of the compression mechanism shown;

[0037] Figure 3 for Figure 2 An enlarged view of section A is shown;

[0038] Figure 4 for Figure 3 An enlarged view of section B is shown;

[0039] Figure 5 A three-dimensional view of a screw and a locking assembly of a compression mechanism provided by another embodiment of the present invention;

[0040] Figure 6 for Figure 5 An exploded perspective view of the leadscrew and locking assembly of the compression mechanism is shown.

[0041] Reference numerals:

[0042] 100, compression plate; 200, mounting seat; 300, sliding seat; 310, locking hole; 410, lead screw; 411, first locking disk; 412, second locking disk; 420, nut; 431, locking block; 432, first elastic member; 433, permanent magnet; 434, electromagnet; 435, fixed electrode; 436, movable electrode; 437, second elastic member; 438, ball; 439, third elastic member; 440, locking sleeve; 441, half sleeve; 450, first wedge block; 460, second wedge block; 470, first annular spring; 480, second annular spring; 490, screw. DETAILED DESCRIPTION

[0043] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0044] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0047] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] In one embodiment, Figure 1-6 As shown, the present invention provides a compression mechanism, including a compression plate 100, a mounting seat 200 and a first driving assembly (not shown in the drawings) for driving the mounting seat 200 to move. Specifically, the mounting seat 200 has a first position and a second position, and the first driving assembly is used to drive the mounting seat 200 to perform reciprocating linear motion between the first position and the second position. During the detection process, when it is necessary to clamp the patient's breast, the patient places the breast on the detection platform, and the first driving assembly drives the mounting seat 200 to move downward from the first position to the second position with the compression plate 100. Under the action of the compression plate 100 and the detection platform, the purpose of clamping the patient's breast can be achieved. When the detection is completed, the first driving assembly drives the mounting seat 200 to move upward from the second position to the first position with the compression plate 100, so as to achieve the purpose of releasing the patient's breast.

[0050] The pressing mechanism further includes a sliding seat 300 and a second driving assembly.

[0051] The sliding seat 300 is arranged on the mounting seat 200 and can move with the mounting seat 200. The sliding seat 300 is slidably connected to the mounting seat 200, and the sliding seat 300 can make reciprocating linear motion between the third position and the fourth position relative to the mounting seat 200 in the longitudinal direction, wherein when the sliding seat 300 is in the third position, the sliding seat 300 is located on the upper side of the mounting seat 200, and when the sliding seat 300 is in the fourth position, the sliding seat 300 is located on the lower side of the mounting seat 200, and the compression plate 100 is installed on the sliding seat 300 and can move with the sliding seat 300. The second driving assembly is used to drive the sliding seat 300 to make reciprocating linear motion between the third position and the fourth position.

[0052] During normal use, the sliding seat 300 is driven to the fourth position by the driving assembly. When the patient's breast needs to be clamped, the patient places the breast on the detection platform, and the first driving assembly drives the mounting seat 200 to move downward from the first position to the second position with the sliding seat 300 and the compression plate 100. Under the action of the compression plate 100 and the detection platform, the purpose of clamping the patient's breast can be achieved. When the detection is completed, the first driving assembly drives the mounting seat 200 to move upward from the second position to the first position with the sliding seat 300 and the compression plate 100, so as to release the patient's breast.

[0053] During the detection process, if the breast X-ray machine is unable to release the breast by driving the mounting seat 200 from the second position upward to the first position through the first driving component due to an emergency such as a power outage or failure, the sliding seat 300 can be driven by the second driving component to move the compression plate 100 upward from the fourth position to the third position, thereby achieving the purpose of releasing the patient's breast. There is no need to rotate the power source of the breast X-ray machine in the direction, the operation is simple, the use is convenient, and the patient's pain time is reduced.

[0054] In one embodiment, the second driving assembly includes a lead screw 410 , a nut 420 , and a scroll torsion spring (not shown in the drawings).

[0055] The lead screw 410 is rotatably connected to the mounting seat 200. The nut 420 is sleeved on the lead screw 410, and the nut 420 is fixedly connected to the sliding seat 300. The scroll torsion spring is arranged on the mounting seat 200, and the two ends of the scroll torsion spring are respectively connected to the mounting seat 200 and the lead screw 410. When the scroll torsion spring releases pressure, the scroll torsion spring drives the lead screw 410 to rotate in the opposite direction, so that the sliding seat 300 moves from the fourth position to the third position.

[0056] The compression mechanism also includes a locking component, which has a locked state and an unlocked state. When the locking component is in the locked state, the locking component locks the screw 410 or locks the sliding seat 300 in the fourth position. When the locking component is in the unlocked state, the locking component releases the lock on the sliding seat 300 or the screw 410.

[0057] During use, during normal use, the sliding seat 300 is placed in the fourth position. Under the action of the locking assembly, the locking assembly prevents the lead screw 410 from rotating, thereby achieving the purpose of locking the sliding seat 300 in the fourth position, or the locking assembly directly locks the sliding seat 300, thereby locking the sliding seat 300 in the fourth position.

[0058] When an emergency occurs in the breast X-ray machine, the locking assembly is placed in an unlocked state, and the scroll torsion spring releases its elastic force. Under the action of the scroll torsion spring, the scroll torsion spring drives the lead screw 410 to rotate in the opposite direction, thereby driving the sliding seat 300 from the fourth position to the third position, thereby releasing the patient's breast.

[0059] When the patient's breast needs to be compressed again, the sliding seat 300 is moved to the fourth position, and the sliding seat 300 drives the lead screw 410 to rotate forward through the nut 420, so that the scroll torsion spring accumulates force. When the sliding seat 300 moves to the fourth position, the locking assembly is placed in a locked state, thereby achieving the purpose of locking the lead screw 410 or the sliding seat 300, and further achieving the purpose of locking the sliding seat 300 in the fourth position.

[0060] Then, the first driving assembly drives the mounting seat 200 to move the sliding seat 300 and the compression plate 100 downward from the first position to the second position, thereby achieving the purpose of compressing the patient's breast.

[0061] The second driving assembly provided in this embodiment has a simple structure and a reasonable design. The sliding seat 300 can be driven from the fourth position to the third position by simply placing the locking assembly in an unlocked state, and the operation is convenient.

[0062] In one embodiment, the locking assembly includes a locking hole 310, a locking block 431 and a first driving structure.

[0063] The locking hole 310 is provided on the sliding seat 300. The locking block 431 is provided in the mounting seat 200, and the locking block 431 has a fifth position and a sixth position, wherein when the locking block 431 is in the fifth position, the locking block 431 is separated from the locking insertion hole so that the locking assembly is in an unlocked state, and when the locking block 431 is in the sixth position, the locking block 431 is inserted into the locking insertion hole so that the locking assembly is in a locked state. The first driving structure is used to drive the locking block 431 to reciprocate between the fifth position and the sixth position.

[0064] During use, when the sliding seat 300 moves to the fourth position, the locking hole 310 opened on the sliding seat 300 corresponds to the locking block 431 set on the mounting seat 200. At this time, the locking block 431 is driven from the fifth position to the sixth position through the first driving structure, so as to achieve the purpose of locking the sliding seat 300 in the fourth position.

[0065] When the locking block 431 is driven from the sixth position to the fifth position by the first driving structure, the purpose of unlocking the sliding seat 300 can be achieved.

[0066] The locking assembly provided in this embodiment has a simple structure, reasonable design, and is easy to operate.

[0067] In one embodiment, the first driving structure includes a first elastic member 432 , a permanent magnet 433 and an electromagnet 434 .

[0068] The two ends of the first elastic member 432 are respectively connected to the locking block 431 and the mounting seat 200, and in a natural state, the first elastic member 432 has a tendency to move the locking block 431 from the sixth position to the fifth position. In this embodiment, the first elastic member 432 is a spring, specifically, the first elastic member 432 is a tension spring.

[0069] The permanent magnet 433 is fixedly embedded in one end of the locking block 431 away from the locking hole 310. The electromagnet 434 is fixedly arranged on the mounting seat 200, and when the electromagnet 434 is energized, the magnetism of the electromagnet 434 and the side opposite to the permanent magnet 433 is the same.

[0070] When the electromagnet 434 is energized, since the magnetism of the electromagnet 434 and the side opposite to the permanent magnet 433 is the same, a magnetic repulsion force will be generated between the electromagnet 434 and the permanent magnet 433. Under the action of the magnetic repulsion force, the locking block 431 overcomes the elastic force of the first elastic member 432 and moves from the fifth position to the sixth position, thereby achieving the purpose of locking the sliding seat 300 in the fourth position.

[0071] When the electromagnet 434 is powered off, the locking block 431 moves from the sixth position to the fifth position under the action of the elastic force of the first elastic member 432 , thereby releasing the locking of the sliding seat 300 .

[0072] The first driving structure provided in this embodiment has a simple structure and a reasonable design. When the breast X-ray machine has a power failure or other faults, the electromagnet 434 is directly powered off. Under the action of the elastic force of the first elastic member 432, the locking block 431 moves from the sixth position to the fifth position, thereby achieving the purpose of releasing the lock on the sliding seat 300, and further achieving the purpose of being able to respond to the power failure or other faults of the breast X-ray machine in a timely manner, thereby achieving the purpose of releasing the patient's breast in a timely manner. When the breast X-ray machine has a non-power failure or other faults, it is only necessary to unplug the power supply of the breast machine, turn off the breast machine, or disconnect the power supply of the electromagnet 434, etc., to achieve the purpose of releasing the lock on the sliding seat 300. The operation is convenient, and the patient's breast can be released in a timely manner, reducing the patient's pain time.

[0073] In one embodiment, a fixed electrode 435 and a movable electrode 436 are disposed on the circuit of the electromagnet 434 .

[0074] The movable electrode 436 has a seventh position and an eighth position. When the movable electrode 436 is in the seventh position, the movable electrode 436 is separated from the fixed electrode 435 to disconnect the circuit of the electromagnet 434; when the movable electrode 436 is in the eighth position, the movable electrode 436 and the fixed electrode 435 contact each other to connect the circuit of the electromagnet 434. The locking assembly also includes a second driving structure, which is used to drive the movable electrode 436 to reciprocate between the seventh position and the eighth position.

[0075] When in use, after the sliding seat 300 is moved to the fourth position, the second driving structure is used to drive the movable electrode 436 from the seventh position to the eighth position, thereby turning on the power supply of the electromagnet 434. Under the action of the magnetic repulsion between the electromagnet 434 and the permanent magnet 433, the locking block 431 is driven from the first position to the second position, thereby locking the sliding seat 300 in the fourth position.

[0076] In one embodiment, both the fixed electrode 435 and the movable electrode 436 are disposed within the mounting base 200 .

[0077] The second driving structure includes a second elastic member 437 , a ball 438 and a third elastic member 439 .

[0078] The two ends of the second elastic member 437 are respectively connected to the mobile electrode 436 and the mounting base 200, and in a natural state, the second elastic member 437 has a tendency to move the mobile electrode 436 from the eighth position to the seventh position. In this embodiment, the second elastic member 437 is a spring, specifically, the second elastic member 437 is a compression spring.

[0079] The ball 438 is disposed in the sliding seat 300, and the ball 438 has a ninth position and a tenth position. When the ball 438 is in the ninth position, the ball 438 retracts into the side wall of the sliding seat 300; when the ball 438 is in the tenth position, the ball 438 protrudes out of the side wall of the sliding seat 300 to drive the moving electrode 436 from the seventh position to the eighth position.

[0080] Two ends of the third elastic member 439 are respectively in contact with the sliding seat 300 and the ball 438 , and in a natural state, the third elastic member 439 has a tendency to move the ball 438 from the ninth position to the tenth position.

[0081] Specifically, a groove adapted to the ball 438 is provided on the mounting seat 200, and the end of the mobile electrode 436 away from the fixed electrode 435 extends into the groove. When the sliding seat 300 slides to the fourth position, the ball 438 corresponds to the groove, and under the action of the third elastic member 439, the third elastic member 439 drives the ball 438 from the ninth position to the tenth position, so that the ball 438 extends into the groove, thereby achieving the purpose of automatically driving the mobile electrode 436 from the seventh position to the eighth position, and the operation is convenient. At the same time, when the ball 438 extends into the groove under the action of the elastic force of the third elastic member 439, a prompt can also be given that the sliding seat 300 moves into place.

[0082] When the sliding seat 300 moves to the third position, the ball 438 leaves the groove, and under the action of the mounting seat 200, the ball 438 overcomes the elastic force of the second elastic member 437 and moves from the tenth position to the ninth position. Under the elastic force of the third elastic member 439, the movable electrode 436 moves from the eighth position to the seventh position, thereby disconnecting the circuit of the electromagnet 434.

[0083] Preferably, a switch is also provided on the circuit of the electromagnet 434, so as to achieve the purpose of timely disconnecting the circuit of the electromagnet 434 when a fault such as a non-power-off occurs in the breast X-ray machine.

[0084] like Figure 5-6 As shown, other structures in this embodiment are the same as those in the above embodiment, except that in this embodiment, its locking assembly is used to lock the rotation of the screw 410, and the locking assembly includes a locking sleeve 440, a first wedge block 450, a second wedge block 460, a first annular spring 470, a second annular spring 480 and a screw 490.

[0085] The locking sleeve 440 is arranged on the mounting seat 200 and is coaxially arranged with the screw 410. The locking sleeve 440 includes two symmetrically arranged half sleeves 441. The two half sleeves 441 can reciprocate between the eleventh position and the twelfth position in the direction of approaching or moving away from each other. When the two half sleeves 441 are in the eleventh position, the two sleeves are away from each other; when the two half sleeves 441 are in the twelfth position, the two half sleeves 441 are arranged to form the above-mentioned locking sleeve 440.

[0086] The first wedge block 450 is arranged at an angle, and a first locking plate 411 is coaxially arranged at one end of the screw 410. The first locking plate 411 is fixedly connected to the screw 410. The middle part of the first wedge block 450 is rotatably connected to the first locking plate 411. The first end of the first wedge block 450 abuts against the side wall of the screw 410, and the second end can abut against the locking sleeve 440. There are multiple first wedge blocks 450, and the multiple first wedge blocks 450 are evenly arranged around the axial center line of the screw 410, and all the first wedge blocks 450 have the same inclination direction.

[0087] The second wedge block 460 is arranged obliquely, and a second locking plate 412 is coaxially arranged at one end of the lead screw 410, and the second locking plate 412 is fixedly connected to the lead screw 410. The middle part of the second wedge block 460 is rotatably connected to the second locking plate 412, and the first end of the second wedge block 460 contacts the outer wall of the lead screw 410, and the second end can contact the locking sleeve 440. There are multiple second wedge blocks 460, and the multiple second wedge blocks 460 are evenly arranged around the axis of the lead screw 410, and all the second wedge blocks 460 have the same inclination direction. Among them, the first wedge block 450 and the second wedge block 460 have opposite inclination directions.

[0088] The first annular spring 470 is sleeved on the plurality of first wedges 450, and in a natural state, the first annular spring 470 has a tendency to keep the first end of the first wedge 450 in contact with the side wall of the lead screw 410. The second annular spring 480 is sleeved on the plurality of second wedges 460, and in a natural state, the second annular spring 480 has a tendency to keep the first end of the second wedge 460 in contact with the side wall of the lead screw 410.

[0089] The third driving structure is used to drive the two half sleeves 441 to reciprocate between the eleventh position and the twelfth position.

[0090] Specifically, the third driving structure includes a screw 490, which is rotatably connected to the mounting base 200. The screw 490 is provided with two external thread sections with the same pitch but opposite spiral directions. The screw 490 is threadedly connected to the two half sleeves 441 through the two external thread sections, so that when the screw 490 is rotated in the forward direction, the screw 490 drives the two half sleeves 441 to approach each other at the same time (that is, drives the two half sleeves 441 to move from the twelfth position to the eleventh position at the same time), and when the screw 490 is rotated in the reverse direction, the screw 490 drives the two half sleeves 441 to move away from each other at the same time (that is, drives the two half sleeves 441 to move from the eleventh position to the twelfth position at the same time).

[0091] Specifically, when in use, when both half sleeves 441 are in the eleventh position, the first ends of the first wedge block 450 and the second wedge block 460 are in contact with the side wall of the lead screw 410, and the second ends are in contact with the locking sleeve 440. When the lead screw 410 rotates forward, the second wedge block 460 is deflected by the friction between the second wedge block 460 and the locking sleeve 440. However, the friction between the first wedge block 450 and the locking sleeve 440 causes the first end of the first wedge block 450 to be in contact with the side wall of the lead screw 410, and the second end to be in contact with the side wall of the locking sleeve 440, thereby achieving the purpose of preventing the lead screw 410 from rotating forward.

[0092] When the lead screw 410 rotates in the reverse direction, the first wedge 450 is deflected by the friction between the first wedge 450 and the locking sleeve 440. However, the friction between the second wedge 460 and the locking sleeve 440 causes the first end of the second wedge 460 to contact the side wall of the lead screw 410 and the second end to contact the side wall of the locking sleeve 440, thereby preventing the lead screw 410 from rotating in the reverse direction.

[0093] Therefore, under the joint action of the first wedge block 450 and the second wedge block 460 , the lead screw 410 can neither rotate forwardly nor rotate backwardly, thereby achieving the purpose of locking the lead screw 410 .

[0094] When the two half sleeves 441 are both in the twelfth position, the second ends of the first wedge block 450 and the second wedge block 460 cannot interfere with the side wall of the locking sleeve 440, so that the screw 410 can rotate both forward and reverse, thereby achieving the purpose of unlocking the screw 410.

[0095] In one embodiment, the present invention further provides a breast X-ray machine, comprising the compression mechanism provided by any of the above embodiments.

[0096] In the description of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A compression mechanism, comprising a compression plate (100), a mounting seat (200) and a first driving assembly for driving the mounting seat (200) to move, the mounting seat (200) having a first position and a second position, the first driving assembly for driving the mounting seat (200) to perform reciprocating linear motion between the first position and the second position, characterized in that: Also includes: a sliding seat (300) disposed on the mounting seat (200) and movable with the mounting seat (200), being slidably connected to the mounting seat (200), and being capable of reciprocating linear motion between a third position and a fourth position relative to the mounting seat (200) in the longitudinal direction, wherein when the sliding seat is in the third position, the sliding seat is located on the upper side of the mounting seat (200), and when the sliding seat is in the fourth position, the sliding seat is located on the lower side of the mounting seat (200); and A second driving assembly, used for driving the sliding seat (300) to perform reciprocating linear motion between the third position and the fourth position; Wherein, the compression plate (100) is arranged on the sliding seat (300) and can move together with the sliding seat (300); The second driving assembly comprises: A lead screw (410) rotatably connected to the mounting seat (200); a nut (420), which is sleeved on the lead screw (410) and fixedly connected to the sliding seat (300); and A scroll torsion spring, which is arranged on the mounting seat (200), and whose two ends are respectively connected to the mounting seat (200) and the lead screw (410); When the scroll torsion spring releases pressure, the scroll torsion spring drives the lead screw (410) to rotate in the opposite direction, so that the sliding seat (300) moves from the fourth position to the third position; The compression mechanism further comprises a locking assembly, the locking assembly having a locked state and an unlocked state, when the locking assembly is in the locked state, the locking assembly locks the lead screw (410) or locks the sliding seat (300) in the fourth position, and when the locking assembly is in the unlocked state, the locking assembly releases the lock on the sliding seat (300) or the lead screw (410); During detection, the locking assembly is placed in a locked state to lock the sliding seat at the fourth position, and the first driving assembly drives the mounting seat (200) to move the sliding seat (300) and the compression plate (100) downward from the first position to the second position to compress the patient's breast; When an emergency occurs in the breast X-ray machine, the locking assembly is placed in an unlocked state, and the scroll torsion spring releases its elastic force to drive the lead screw (410) to rotate in the opposite direction, thereby driving the sliding seat (300) from the fourth position to the third position to release the patient's breast.

2. The compression mechanism according to claim 1, characterized in that: The locking assembly comprises: A locking hole (310) disposed on the sliding seat (300); a locking block (431) disposed in the mounting seat (200) and having a fifth position and a sixth position, wherein when the locking block is in the fifth position, the locking block is separated from the locking insertion hole so that the locking assembly is in an unlocked state, and when the locking block is in the sixth position, the locking block is inserted in the locking insertion hole so that the locking assembly is in a locked state; and The first driving structure is used to drive the locking block (431) to reciprocate between the fifth position and the sixth position.

3. The compression mechanism according to claim 2, characterized in that: The first driving structure comprises: A first elastic member (432), two ends of which are respectively connected to the locking block (431) and the mounting seat (200), and in a natural state, has a tendency to cause the locking block (431) to move from the sixth position to the fifth position; a permanent magnet (433) fixedly embedded in an end of the locking block (431) away from the locking hole (310); and The electromagnet (434) is fixedly arranged on the mounting seat (200), and when the electromagnet (434) is energized, the magnetism of the side of the electromagnet (434) opposite to the permanent magnet (433) is the same.

4. The compression mechanism according to claim 3, characterized in that: A fixed electrode (435) and a movable electrode (436) are provided on the circuit of the electromagnet (434); The movable electrode (436) has a seventh position and an eighth position, wherein when the movable electrode (436) is in the seventh position, the movable electrode (436) is separated from the fixed electrode (435) to disconnect the circuit of the electromagnet (434), and when the movable electrode (436) is in the eighth position, the movable electrode (436) and the fixed electrode (435) contact each other to connect the circuit of the electromagnet (434); The locking assembly further comprises a second driving structure, wherein the second driving structure is used to drive the movable electrode (436) to perform reciprocating linear motion between the seventh position and the eighth position.

5. The compression mechanism according to claim 4, characterized in that: The fixed electrode (435) and the movable electrode (436) are both arranged in the mounting seat (200); The second driving structure comprises: A second elastic member (437), two ends of which are respectively connected to the movable electrode (436) and the mounting seat (200), and in a natural state, has a tendency to move the movable electrode (436) from the eighth position to the seventh position; a ball (438) disposed in the sliding seat (300) and having a ninth position and a tenth position. When the ball is in the ninth position, the ball is retracted into the side wall of the sliding seat (300), and when the ball is in the tenth position, the ball protrudes out of the side wall of the sliding seat (300) to drive the moving electrode (436) from the seventh position to the eighth position; and The third elastic member (439) has two ends respectively in contact with the sliding seat (300) and the ball (438), and in a natural state, has a tendency to cause the ball (438) to move from the ninth position to the tenth position.

6. A breast X-ray machine, characterized in that: Comprising the compression mechanism described in any one of claims 1-5.

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