CN212849807U - Ultrasonic tissue cutting knife transducer end face sealing structure - Google Patents

Abstract

The utility model relates to the technical field of ultrasonic medical treatment, in particular to an ultrasonic tissue cutting knife transducer end face sealing structure, which comprises a front cover, a rear cover connected with the front cover and an amplitude transformer arranged between the front cover and the rear cover, wherein a first sealing ring is arranged between the front cover and the rear cover; the amplitude transformer is provided with a positioning flange; a supporting flange is arranged on the first side of the positioning flange in the front cover, and a third sealing ring is arranged between the supporting flange and the positioning flange; the support flange is provided with a first through hole; a second sealing ring and a switch conducting ring are arranged on the side, far away from the positioning flange, of the supporting flange in the front cover, a second through hole is formed in the second sealing ring, a cable connected with the switch conducting ring passes through the second through hole and the first through hole and then enters the second side of the positioning flange by bypassing the third sealing ring and the positioning flange, and the cable is in interference fit with the second through hole. In the embodiment, the problem that gas bypasses a positioning flange to enter the transducer is solved through the second sealing ring and the third sealing ring, and the sealing effect of the end face of the transducer is improved.

Description

Ultrasonic tissue cutting knife transducer end face sealing structure

Technical Field

The utility model relates to an supersound medical treatment technical field especially relates to an supersound tissue cutting knife transducer end face seal structure.

Background

The transducer is a core device of the ultrasonic equipment and needs to be in a dry environment during working. However, in the process of performing moist heat sterilization and low temperature plasma sterilization on the transducer, gas or liquid can enter the interior of the transducer from the cable sheath or the assembly matching area, so that the performance of the piezoelectric ceramic inside the transducer is reduced or damaged, and even the transducer cannot be effectively sterilized.

The cable of the existing piezoelectric ultrasonic transducer bypasses the positioning flange of the amplitude transformer and enters the area where the piezoelectric ceramic component is located after the switch conducting ring is connected out. Because grooves or through holes need to be formed at the position where the cable passes through, gas easily enters the internal structure of the transducer along the lead, and the performance of the piezoelectric ceramic is affected.

SUMMERY OF THE UTILITY MODEL

Based on above, an object of the utility model is to provide an supersound tissue cutting knife transducer end face seal structure solves the cable and bypasses the gas leakage problem of amplitude transformer positioning flange process.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides an ultrasonic tissue cutting knife transducer end face sealing structure, which comprises a front cover, a rear cover connected with the front cover and an amplitude transformer arranged between the front cover and the rear cover, wherein a first sealing ring is arranged between the front cover and the rear cover; wherein the amplitude transformer is provided with a positioning flange; a supporting flange is arranged on the first side of the positioning flange in the front cover, and a third sealing ring is arranged between the supporting flange and the positioning flange; the supporting flange is provided with a first through hole; the front cover is internally provided with a second sealing ring and a switch conducting ring at the side of the supporting flange far away from the positioning flange, the second sealing ring is provided with a second through hole, a cable connected with the switch conducting ring passes through the second through hole and bypasses the third sealing ring after the first through hole and enters the second side of the positioning flange, and the cable is in interference fit with the second through hole.

Optionally, one end of the second sealing ring is provided with a first annular step, and the second through hole is an inclined hole and is arranged between the annular step and the circumferential side surface of the second sealing ring.

Optionally, at least two first convex rings are arranged on the circumferential surface of the second sealing ring in contact with the front cover at intervals, and at least two second convex rings are arranged on the end surface of the second sealing ring in contact with the support flange at intervals.

Optionally, an annular groove is formed in a contact end of the support flange and the third sealing ring, and the third sealing ring is arranged in the annular groove.

Optionally, a fourth sealing ring is further arranged between the rear cover and the front cover, the positioning flange is sleeved with the fourth sealing ring, a wire slot is formed in the contact side of the fourth sealing ring and the front cover, and the cable enters the second side of the positioning flange after passing through the wire slot.

Optionally, a positioning groove is formed in the contact end of the fourth sealing ring and the rear cover, a positioning protrusion is arranged at one end of the rear cover, and the rear cover and the fourth sealing ring are matched with the positioning protrusion through the positioning groove.

Optionally, the positioning flange is provided with a truncated cone, and the diameter of the truncated cone gradually increases from the second side of the positioning flange to the first side of the positioning flange; the contact end of the fourth sealing ring and the conical frustum is a conical groove, and the fourth sealing ring and the positioning flange are matched with the conical groove through the conical frustum.

Optionally, the conical groove is provided with at least two third convex rings at intervals.

Optionally, an inner ring support frame and an inner ring connection sleeve are further arranged in the front cover, one end of the inner ring support frame is abutted to the support flange, the other end of the inner ring support frame is abutted to the inner ring connection sleeve and the switch conducting ring, the switch conducting ring is clamped between the inner ring connection sleeve and the side wall of the front cover, a second annular step is arranged on the switch conducting ring close to the side wall of the front cover, a gap is formed between the second annular step and the side wall of the front cover, and a front conducting ring is inserted into the gap to fix the switch conducting ring between the front conducting ring and the inner ring connection sleeve; the inner ring support frame is provided with a third through hole, and the cable enters the second through hole after passing through the third through hole.

Optionally, the connection relationship between the front cover and the rear cover is an interference fit.

The utility model has the advantages that:

the utility model provides an ultrasonic tissue cutting knife transducer end face sealing structure, which comprises a front cover, a rear cover connected with the front cover and an amplitude transformer arranged between the front cover and the rear cover, wherein a first sealing ring is arranged between the front cover and the rear cover; wherein, the amplitude transformer is provided with a positioning flange; a supporting flange is arranged on the first side of the positioning flange in the front cover, and a third sealing ring is arranged between the supporting flange and the positioning flange; the support flange is provided with a first through hole; a second sealing ring and a switch conducting ring are arranged on the side, far away from the positioning flange, of the supporting flange in the front cover, a second through hole is formed in the second sealing ring, a cable connected with the switch conducting ring passes through the second through hole and the first through hole and then enters the second side of the positioning flange by bypassing the third sealing ring and the positioning flange, and the cable is in interference fit with the second through hole.

This embodiment is through setting up the second sealing washer between supporting flange and switch conducting ring for gaseous unable first through-hole of passing through has solved gaseous cable surface along the line and has got into the inside problem of transducer, through the third sealing washer between flange and the supporting flange, makes gaseous unable clearance of passing through between flange and the supporting flange, has solved gaseous problem of bypassing the flange and getting into the transducer inside, has improved the sealed effect of transducer terminal surface.

Drawings

Fig. 1 is a schematic structural view of an end face sealing structure of an ultrasonic tissue cutting knife transducer provided by an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second sealing ring according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a fourth sealing ring according to an embodiment of the present invention.

In the figure:

1. a front cover; 11. a support flange; 111. a first through hole; 112. an annular groove;

2. a rear cover; 21. a limiting groove;

3. an amplitude transformer; 31. positioning the flange; 32. a truncated cone;

41. a first seal ring;

42. a second seal ring; 421. a first convex ring; 422. a second through hole; 423. a first annular step; 424. a second convex ring;

43. a third seal ring;

44. a fourth seal ring; 441. a wire slot; 442. positioning a groove; 443. a conical groove;

5. a switch conducting ring; 51. a second annular step;

6. an inner ring support frame; 61. a third through hole;

7. an inner ring connecting sleeve;

8. a front conductive loop;

100. a cable.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Fig. 1 is the utility model discloses the structural schematic diagram of ultrasonic tissue cutting knife transducer end face seal structure that the embodiment provided, fig. 2 is the utility model provides a structural schematic diagram of second sealing washer. Referring to fig. 1-2, the present embodiment provides an end face sealing structure of an ultrasonic tissue cutting knife transducer, which includes a front cover 1, a rear cover 2 connected to the front cover 1, and a horn 3 disposed between the front cover 1 and the rear cover 2, wherein a first sealing ring 41 is disposed between the front cover 1 and the rear cover 2; wherein, the amplitude transformer 3 is provided with a positioning flange 31; a supporting flange 11 is arranged on the first side of the positioning flange 31 in the front cover 1, and a third sealing ring 43 is arranged between the supporting flange 11 and the positioning flange 31; the support flange 11 is provided with a first through hole 111; the side of the front cover 1, which is far away from the positioning flange 31, of the support flange 11 is provided with a second sealing ring 42 and a switch conductive ring 5, the second sealing ring 42 is provided with a second through hole 422, the cable 100 connected with the switch conductive ring 5 passes through the second through hole 422 and the first through hole 111 and then enters the second side of the positioning flange 31 by bypassing the third sealing ring 43 and the positioning flange 31, and the cable 100 and the second through hole 422 are in interference fit.

In the embodiment, specifically, a limiting groove 21 is formed at the joint of the periphery of the rear cover 2 and the front cover 1, the first sealing ring 41 is arranged in the limiting groove 21, and in the installation process of the front cover 1 and the rear cover 2, the first sealing ring 41 cannot be dislocated, so that the installation efficiency and the sealing effect are improved; in addition, because the first sealing ring 41 is located in the limiting groove 21, the deformation of the first sealing ring 41 after being extruded is restricted in the axial direction of the rear cover 2, so that the deformation of the first sealing ring 41 is performed along the radial direction of the rear cover 2, which is beneficial to filling up the gap between the rear cover 2 and the front cover 1, and further improves the sealing performance between the rear cover 2 and the front cover 1.

In this embodiment, the cable 100 passes through the second through hole 422 and the first through hole 111 and then enters the second side of the positioning flange 31 by bypassing the third sealing ring 43 and the positioning flange 31, and the cable 100 is in interference fit with the second through hole 422; the gas can be effectively prevented from entering the second side of the positioning flange 31 through the second through hole 422, so that the internal structure of the second side of the positioning flange 31 is effectively sealed.

Too large a bending angle of the cable 100 may affect the normal use of the internal conductors and may even cause the internal conductors to break. For this purpose, a first annular step 423 is formed at one end of the second sealing ring 42, and a second through hole 422 is an inclined hole and is formed between the annular step and the circumferential side surface of the second sealing ring 42. The arrangement can reduce the bending angle of the cable 100, avoid the influence on the performance of an internal conducting wire due to the bending of the cable 100 and prolong the service life of the cable 100; on the other hand, the reduction of the bending angle of the cable 100 during the laying process also reduces the total length of the cable 100, thereby reducing the cost. Further, in this embodiment, an inlet of the second through hole 422 is disposed at the first annular step 423, and an outlet thereof is disposed at a boundary between the circumferential surface and the other end surface of the second sealing ring 42, so as to reserve a sufficient area for the second sealing ring 42 to attach to the inner wall of the front cover 1 and the support flange 11, thereby improving the sealing performance.

At least two first convex rings 421 are arranged at intervals on the circumferential surface of the second sealing ring 42 contacted with the front cover 1, and at least two second convex rings 424 are arranged at intervals on the end surface of the second sealing ring 42 contacted with the supporting flange 11. In this embodiment, the number of the first protruding ring 421 and the second protruding ring 424 is preferably two. Of course, in other embodiments, the number of the first protruding ring 421 and the second protruding ring 424 may be three, four, five, or even ten or twenty. The arrangement of the first convex ring 421 and the second convex ring 424 makes the second sealing ring 42 deform first when being extruded, and the first convex ring 421 and the second convex ring 424 deform greatly due to the small size of the first convex ring 421 and the second convex ring 424, which is helpful for improving the fusion performance with the contact surface and improving the sealing effect between the second sealing ring 42 and the front cover 1 and the supporting flange 11.

An annular groove 112 is formed in the end, contacting the third sealing ring 43, of the supporting flange 11, and the third sealing ring 43 is arranged in the annular groove 112. During installation, the third sealing ring 43 is placed in the annular groove 112, so that the third sealing ring 43 can be accurately positioned, and the installation efficiency and accuracy are improved.

Fig. 3 is a schematic structural diagram of a fourth sealing ring according to an embodiment of the present invention. With reference to fig. 3, in order to obtain a better sealing effect, in this embodiment, a fourth sealing ring 44 is further disposed between the rear cover 2 and the front cover 1, the positioning flange 31 is sleeved with the fourth sealing ring 44, a slot 441 is disposed on a contact side of the fourth sealing ring 44 and the front cover 1, and the cable 100 enters the second side of the positioning flange 31 after passing through the slot 441. The fourth sealing ring 44 belongs to the second line of defense and prevents gas from entering the second side from the first side of the positioning flange 31.

Since the cable 100 needs to pass through the wire groove 441, precise positioning is required when the fourth sealing ring 44 is installed. In this embodiment, a positioning groove 442 is formed at a contact end of the fourth sealing ring 44 and the rear cover 2, a positioning protrusion is formed at one end of the rear cover 2, and the rear cover 2 and the fourth sealing ring 44 are matched with the positioning protrusion through the positioning groove 442. The positioning groove 442 and the positioning protrusion are arranged to facilitate positioning when the fourth sealing ring 44 is installed, so that the installation efficiency is improved, and the wire groove 441 can be aligned with the first through hole 111.

Preferably, the positioning flange 31 is provided with a truncated cone 32, and the diameter of the truncated cone 32 gradually increases from the second side of the positioning flange 31 to the first side of the positioning flange 31; the contact end of the fourth sealing ring 44 and the conical frustum 32 is a conical groove 443, and the fourth sealing ring 44 and the positioning flange 31 are matched with the conical groove 443 through the conical frustum 32. Through the cooperation of circular cone platform 32 and circular cone groove 443, in extrusion process, positioning flange 31 can also receive radial force outside receiving the axial force, and the axial force makes amplitude transformer 3 compressed tightly by the axial, can not take place the drunkenness in the axial, and radial force makes amplitude transformer 3 compressed tightly by radial for amplitude transformer 3 is in the central point of protecgulum 1 and back lid 2 and puts, and is comparatively firm. In this embodiment, the conical groove 443 is spaced apart from at least two third protruding rings to increase the sealing performance.

Regarding the fixing manner of the switch conducting ring 5, in this embodiment, specifically, an inner ring supporting frame 6 and an inner ring connecting sleeve 7 are further disposed in the front cover 1, one end of the inner ring supporting frame 6 abuts against the supporting flange 11, the other end of the inner ring supporting frame 6 abuts against the inner ring connecting sleeve 7 and the switch conducting ring 5, the switch conducting ring 5 is sandwiched between the inner ring connecting sleeve 7 and the side wall of the front cover 1, a second annular step 51 is disposed at a position of the switch conducting ring 5 close to the side wall of the front cover 1, a gap is formed between the second annular step 51 and the side wall of the front cover 1, and the switch conducting ring 5 is fixed between the front conducting ring 8 and the inner ring connecting sleeve 7 by the front; the inner ring support frame 6 is provided with a third through hole 61, and the cable 100 enters the second through hole 422 after passing through the third through hole 61. Due to the arrangement, the switch conducting ring 5 can be positioned by being directly inserted into the front cover 1 during installation, so that the installation is more convenient.

This embodiment is comparatively accurate product, and hardly can maintain under the condition that does not have professional equipment, therefore, in this embodiment, the relation of connection of protecgulum 1 and back lid 2 is interference fit. This setting makes this embodiment avoid being torn open by user's privacy and leading to the inner structure to be destroyed in the use.

In this embodiment, the first sealing ring 41, the second sealing ring 42, the third sealing ring 43, and the fourth sealing ring 44 may be made of medical-grade silicone, and the hardness may be SHA80 ° ± 5 °.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. An ultrasonic tissue cutting knife transducer end face sealing structure comprises a front cover (1), a rear cover (2) connected with the front cover (1) and an amplitude transformer (3) arranged between the front cover (1) and the rear cover (2), wherein a first sealing ring (41) is arranged between the front cover (1) and the rear cover (2); it is characterized in that the preparation method is characterized in that,

the amplitude transformer (3) is provided with a positioning flange (31); a supporting flange (11) is arranged on the first side of the positioning flange (31) in the front cover (1), and a third sealing ring (43) is arranged between the supporting flange (11) and the positioning flange (31);

the support flange (11) is provided with a first through hole (111); the utility model discloses a cable, including front cover (1), support flange (11) and switch conducting ring (31), be equipped with second sealing washer (42) and switch conducting ring (5) in front cover (1) in support flange (11) are kept away from locating flange (31) side, second sealing washer (42) are equipped with second through-hole (422), with cable (100) that switch conducting ring (5) are connected pass through second through-hole (422) with bypass behind first through-hole (111) third sealing washer (43) reach locating flange (31) get into the second side of locating flange (31), cable (100) with second through-hole (422) interference fit.

2. An ultrasonic tissue cutting blade transducer end face sealing structure as claimed in claim 1, wherein one end of the second sealing ring (42) is provided with a first annular step (423), and the second through hole (422) is an inclined hole and is arranged between the annular step and the circumferential side face of the second sealing ring (42).

3. An ultrasonic tissue cutting knife transducer end face sealing structure as claimed in claim 1, characterized in that the circumferential surface of the second sealing ring (42) contacting the front cover (1) is provided with at least two first convex rings (421) at intervals, and the end face of the second sealing ring (42) contacting the support flange (11) is provided with at least two second convex rings (424) at intervals.

4. An ultrasonic tissue cutting blade transducer end face sealing structure as claimed in claim 1, characterized in that the end of the support flange (11) in contact with the third sealing ring (43) is provided with an annular groove (112), and the third sealing ring (43) is arranged in the annular groove (112).

5. The ultrasonic tissue cutting knife transducer end face sealing structure according to claim 1, characterized in that a fourth sealing ring (44) is further arranged between the back cover (2) and the front cover (1), the fourth sealing ring (44) is sleeved on the positioning flange (31), a wire groove (441) is arranged on the contact side of the fourth sealing ring (44) and the front cover (1), and the cable (100) enters the second side of the positioning flange (31) after passing through the wire groove (441).

6. An ultrasonic tissue cutting knife transducer end face sealing structure as claimed in claim 5, characterized in that the end of the fourth sealing ring (44) contacting the rear cover (2) is provided with a positioning groove (442), one end of the rear cover (2) is provided with a positioning projection, and the rear cover (2) and the fourth sealing ring (44) are matched with the positioning projection through the positioning groove (442).

7. An ultrasonic tissue cutting blade transducer end face sealing structure as claimed in claim 5, characterized in that the positioning flange (31) is provided with a truncated cone (32), the diameter of the truncated cone (32) gradually increasing from the second side of the positioning flange (31) to the first side of the positioning flange (31); the contact end of the fourth sealing ring (44) and the cone frustum (32) is a cone groove (443), and the fourth sealing ring (44) and the positioning flange (31) are matched with the cone groove (443) through the cone frustum (32).

8. An ultrasonic tissue cutting blade transducer end face sealing structure as claimed in claim 7, characterized in that the conical groove (443) is provided with at least two third convex rings at intervals.

9. An ultrasonic tissue cutting blade transducer end face seal configuration as claimed in claim 1, an inner ring support frame (6) and an inner ring connecting sleeve (7) are also arranged in the front cover (1), one end of the inner ring support frame (6) is abutted against the support flange (11), the other end of the inner ring support frame (6) is abutted against the inner ring connecting sleeve (7) and the switch conducting ring (5), the switch conducting ring (5) is clamped between the inner ring connecting sleeve (7) and the side wall of the front cover (1), a second annular step (51) is arranged on the switch conducting ring (5) close to the side wall of the front cover (1), a gap is formed between the second annular step (51) and the side wall of the front cover (1), and a front conductive ring (8) is inserted into the gap to fix the switch conductive ring (5) between the front conductive ring (8) and the inner ring connecting sleeve (7); the inner ring support frame (6) is provided with a third through hole (61), and the cable (100) enters the second through hole (422) after passing through the third through hole (61).

10. An ultrasonic tissue cutting blade transducer end face sealing structure as claimed in claim 1, characterized in that the connection relationship of the front cover (1) and the back cover (2) is an interference fit.

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