CN116794826B - Locking device - Google Patents
Locking device Download PDFInfo
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- CN116794826B CN116794826B CN202311080291.5A CN202311080291A CN116794826B CN 116794826 B CN116794826 B CN 116794826B CN 202311080291 A CN202311080291 A CN 202311080291A CN 116794826 B CN116794826 B CN 116794826B
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- locking block
- block
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- 238000009434 installation Methods 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 241000219739 Lens Species 0.000 description 40
- 230000000875 corresponding effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000003068 static effect Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
- G02B23/2476—Non-optical details, e.g. housings, mountings, supports
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- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
The invention relates to a locking device, which comprises a base and an upper cover; the bottom is provided withThe seat is provided with a guide groove, and a locking block is movably arranged in the guide groove; the upper cover is provided with a plurality of locking surfaces, and the upper cover is movably arranged on the base so that the locking block can be abutted against the locking surfaces; when the locking block is abutted against the locking surface, the extending direction of the guide groove is a first straight line direction, the normal direction of the locking surface contacting the locking block part is a second straight line direction, and the included angle between the first straight line direction and the second straight line direction isThe friction coefficient between the locking block and the locking surface isSatisfies the following conditions. The locking device has simple structure, low cost and easy realization, and is beneficial to further miniaturization of the endoscope.
Description
Technical Field
The invention relates to the field of endoscopes, in particular to a locking device.
Background
For the hard tube endoscope with the detachable lens rod, the lens rod and the lens are connected through the optical bayonet, wherein the optical bayonet is fixed on the lens through a screw, the lens rod is locked on the optical bayonet, the coaxiality of the optical centers of the lens rod and the lens is ensured, and light can pass through the lens rod completely and be captured by a sensor in the lens.
However, the existing optical bayonet needs to use a very complex structure to lock the end of the lens rod, so that miniaturization is difficult to achieve, and the overall structure of the endoscope and the lens rod is large in size.
Disclosure of Invention
Accordingly, it is necessary to provide a locking device against the problem of the complicated structure of the optical bayonet.
A locking device comprises a base and an upper cover;
the base is provided with a guide groove, and a locking block is movably arranged in the guide groove;
the upper cover is provided with a plurality of locking surfaces, and the upper cover is movably arranged on the base so that the locking block can be abutted against the locking surfaces;
when the locking block is abutted against the locking surface, the extending direction of the guide groove is a first straight line direction, the normal direction of the locking surface contacting the locking block part is a second straight line direction, and the included angle between the first straight line direction and the second straight line direction isThe friction coefficient between the locking block and the locking surface isSatisfies the following conditions。
The base is provided with a rotating axis, the upper cover rotates on the base around the rotating axis, the locking surface extends along the circumferential direction of the rotating axis and is provided with a first end and a second end, and the distance between the locking surface and the rotating axis is gradually reduced in the direction of the first end pointing to the second end.
According to the invention, the elastic piece is arranged between the base and the upper cover, and when the locking block is abutted against the locking surface, the elastic piece provides an acting force for the upper cover, wherein the second end of the acting force points to the locking block.
According to the invention, the base is provided with the first stop piece, the upper cover is provided with the second stop piece, when the first end turns to the locking block, the first stop piece turns to the second stop piece, and when the first stop piece is abutted against the second stop piece, the elastic piece provides acting force for the upper cover, wherein the second end of the acting force points to the direction of the locking block.
The upper cover is provided with a chute, the extending direction of the chute is matched with the extending direction of the locking surface, and the locking block is at least partially positioned in the chute.
The locking surface is a part of the inner wall surface of the chute.
The guide groove of the invention extends radially of the axis of rotation.
The locking surface is a first cambered surface, and the outer wall surface of the locking block facing the locking surface is a second cambered surface.
According to the invention, the upper cover and the base are enclosed to form an installation cavity, and the locking surface is positioned in the installation cavity.
The upper cover is provided with a first rotating surface, the base is provided with a second rotating surface, the first rotating surface and the second rotating surface are cylindrical surfaces taking the rotating shaft line as an axis, and the first rotating surface and the second rotating surface are attached and are positioned in the mounting cavity.
The invention utilizes the guide groove to limit the pushing direction of the end part of the mirror rod to the locking block, and on the basis, utilizes the relative position relation of the normal direction, the tangential direction of the locking surface and the extending direction of the guide groove to realize the friction self-locking of the locking block on the locking surface, thereby providing the holding force to the end part of the mirror rod and ensuring that the end part of the mirror rod stably stays on the base. The locking device has simple structure, low cost and easy realization, and is beneficial to further miniaturization of the endoscope.
Drawings
Fig. 1 is a schematic perspective view of a locking device in embodiment 1 of the present invention;
fig. 2 is a schematic perspective view of a locking device in embodiment 1 of the present invention;
FIG. 3 is a schematic perspective view of a base in embodiment 1 of the present invention;
fig. 4 is a schematic perspective view of the upper cover in embodiment 1 of the present invention;
FIG. 5 is an enlarged schematic view of the structure of FIG. 4A;
FIG. 6 is a schematic diagram showing the bottom structure of the upper cover in embodiment 1 of the present invention;
fig. 7 is a schematic bottom view of the upper cover in embodiment 1 of the present invention.
Reference numerals:
1. a base; 11. a bottom plate; 111. a light transmission port; 112. an operation window; 12. a clasp; 121. a mounting port; 13. an annular plate; 131. a second rotation surface; 132. a guide groove; 1321. a locking block; 13211. a bump; 133. a first stopper; 2. an upper cover; 21. a cover plate; 211. a chute; 22. a side plate; 221. a first rotation surface; 222. a locking surface; 2221. a first end; 2222. a second end; 223. a pin hole; 224. a second stopper; 3. an elastic member; 31. a first pin; 32. and a second pin.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
Example 1:
referring to fig. 1-2, the present embodiment provides a locking device, which includes a base 1 and an upper cover 2, wherein the upper cover 2 is covered on the base 1.
The base 1 has a rotation axis, referring to fig. 3, in this embodiment, the base 1 specifically includes a circular bottom plate 11, a snap ring 12 and an annular plate 13, where the bottom plate 11, the snap ring 12 and the annular plate 13 are coaxially disposed, and the rotation axis of the base 1 is the axes of the snap ring 12, the bottom plate 11 and the annular plate 13. The snap ring 12 is fixed on the upper surface of the bottom plate 11, and the annular plate 13 is sleeved on the outer wall of the snap ring 12 and leaves a certain gap with the upper surface of the bottom plate 11.
The middle portion of the snap ring 12 is a mounting opening 121 that can be used to receive the end of the lens stem and allow the end of the lens stem to lock into the mounting opening 121. In order to enable the end of the lens rod to enter the mounting opening 121, the upper cover 2 needs to avoid during the entering process of the end of the lens rod, so the upper cover 2 in this embodiment is generally in a ring shape to avoid shielding the mounting opening 121. In addition, a light-transmitting opening 111 for transmitting light from the end of the lens is formed at the center of the bottom plate 11.
It is particularly noted that the cover 2 is required to rotate on the base 1 about an axis of rotation. It is easily conceivable that the rotation axis passes through the mounting port 121 and the light-transmitting port 111, and if the rotation axis is a solid axis, the rotation axis not only shields the light-transmitting port 111, but also blocks the process of entering the mounting port 121 from the end of the lens rod.
Referring to fig. 3 to 5, the upper cover 2 of the present embodiment specifically includes an annular cover plate 21 and an annular side plate 22 formed by extending downward from the outer edge of the cover plate 21. The bottom edge of the side plate 22 is fitted to the outer edge of the upper surface of the bottom plate 11 such that the annular plate 13 is located in the middle of the side plate 22. The side edge of the annular plate 13 is a second rotating surface 131, and the portion of the inner wall surface of the side plate 22 opposite to the second rotating surface 131 in the radial direction of the rotation axis is a first rotating surface 221. The first rotating surface 221 and the second rotating surface 131 are cylindrical surfaces, the rotating axes are used as axes, and the first rotating surface 221 and the second rotating surface 131 are attached, so that the upper cover 2 can be rotatably arranged on the base 1 through matching of the first rotating surface 221 and the second rotating surface 131, the rotating axes in the embodiment are virtual axes, shielding of the rotating axes to the light transmitting opening 111 is avoided, and the fact that the rotating axes block the end portion of the lens rod from entering the mounting opening 121 is avoided.
Referring to fig. 3, a guide groove 132 is formed in the base 1, the guide groove 132 extends along the radial direction of the rotation axis, a locking block 1321 is movably disposed in the guide groove 132, and the locking block 1321 is limited by the movement of the guide groove 132 and can only move in the guide groove 132 along the radial direction of the rotation axis. In this embodiment, one end of the guide groove 132 and the middle portion thereof are located on the upper surface of the annular plate 13, and the other end of the guide groove 132 is located on the top edge of the snap ring 12 and forms a notch on the top edge of the snap ring 12, so as to ensure the communication between the guide groove 132 and the mounting opening 121, so as to allow the locking block 1321 to enter the mounting opening 121 through the guide groove 132. The shape of the end of the mirror rod is a cone, when the end of the mirror rod axially enters the mounting opening 121 along the axis of the rotating shaft, the locking block 1321 can be pushed to be gradually separated from the mounting opening 121 along the radial direction of the rotating shaft, and if the outer diameter of the mirror rod is larger and is close to the inner diameter of the clamping ring 12, the locking block 1321 can be completely pushed out of the mounting opening 121.
Referring to fig. 4-5, the upper cover 2 has a plurality of locking surfaces 222, and when the upper cover 2 rotates on the base 1, the locking surfaces 222 are also driven to rotate around the rotation axis, so as to change the position of the locking surfaces 222 in the circumferential direction of the rotation axis. In the present embodiment, the locking surface 222 is formed by protruding the inner wall surface of the side plate 22, and the locking surface 222 is located above the first rotating surface 221, so that the locking surface 222 and the guiding groove 132 are located in the same plane, and the contact possibility between the locking surface 222 and the locking block 1321 is ensured.
The area of the locking surface 222 may be large or small, and only needs to ensure that when the locking surface 222 rotates to the end of the guide groove 132 (the locking surface 222 and the guide groove 132 are opposite in the radial direction of the rotation axis), the locking block 1321 moves along the guide groove 132 under the pushing action of the end of the lens rod and can be in contact with and abut against the locking surface 222, so that in some other embodiments, the guide groove 132 may not extend in the radial direction of the rotation axis, but have a certain offset angle with the radial direction of the rotation axis. After the locking surface 222 rotates away from the end of the guide groove 132, the locking piece 1321 and the locking surface 222 are in a separated state.
The present embodiment is designed to lock the upper cover 2 by friction between the locking surface 222 and the locking block 1321 to prevent the upper cover 2 from rotating on the base 1 when the locking block 1321 is pushed by the end of the lens rod and then abuts against the locking surface 222, and the locking block 1321 obtains sufficient supporting force by the locking surface 222 to generate sufficient pressure on the end of the lens rod, and further generate sufficient friction between the locking block 1321 and the end of the lens rod to realize stable locking of the end of the lens rod in the mounting port 121.
Referring to fig. 6-7, the locking block 1321 is abutted against the locking surface 222, and the pushing force of the end of the lens rod to the locking block 1321 is thatSince the locking piece 1321 is limited by the direction of the guide groove 132The direction of the guide groove 132 is the extending direction of the guide groove for convenience of descriptionThe extending direction of the guide groove 132 is a first straight line direction. Wherein the method comprises the steps ofCan be broken down into forces in the normal direction (second linear direction for ease of description) of the portion of locking surface 222 in contact with locking block 1321And the force of the locking surface 222 in contact with the portion of the locking block 1321 in the tangential direction (for convenience of description, denoted as the third linear direction). It is particularly noted that the forces in the third straight directionSo that the upper cover 2 generates a rotation tendency on the base 1, and thus a friction force is generated between the locking block 1321 and the locking surface 222, as long asThe maximum static friction force between the locking block 1321 and the locking surface 222 is not greater than the maximum static friction force, so that the upper cover 2 can be prevented from rotating on the base 1, the position of the locking block 1321 is stabilized, the corresponding effect of stably positioning the end part of the lens rod in the mounting opening 121 can be achieved, and the self-locking of the end part of the lens rod in the mounting opening 121 is further realized. Wherein the second direction is in a straight lineThe positive pressure applied to the locking surface 222 causes the coefficient of friction between the locking surface 222 and the locking block 1321 to beThe maximum static friction between the locking surface 222 and the locking block 1321 is thereforeThat is, the requirement of stable self-locking of the end of the lens rod is satisfied. First straight line squareThe included angle between the direction and the second straight line direction isThus, it is，Thereby (e) providingSimplified to obtainOnly need to satisfySelf-locking of the end of the lens rod in the mounting opening 121 can be achieved.
Referring to fig. 4-7, the locking surface 222 of the present embodiment has a larger area, and extends in the circumferential direction of the rotation axis and has a first end 2221 and a second end 2222 to encircle the rotation axis. In particular, the spacing between the locking surface 222 and the axis of rotation decreases gradually in the direction in which the first end 2221 points toward the second end 2222. The locking surface 222 may be a non-cylindrical surface or a cylindrical surface that does not take the axis of the rotation shaft as an axis. It will be readily appreciated that, in the case where the different portions of the locking surface 222 are opposite the guide groove 132, the amount of movement of the locking piece 1321 required to abut against the locking surface 222 is not the same, and the distance of movement of the locking piece 1321 at the guide groove 132 is determined by the size of the mirror rod, the larger the size of the end of the mirror rod (equivalently, the closer to the inner diameter of the snap ring 12), the larger the pushing distance of the locking piece 1321 when the end of the mirror rod completely enters the snap ring 12. Accordingly, when different sized mirror rod ends are received within the snap ring 12, the locking block 1321 abuts different portions of the locking surface 222. Therefore, the structural design of the locking surface 222 of this embodiment can adapt to the self-locking process of the end parts of the lens rods with different specifications. It will be readily appreciated that the closer the locking block 1321 is in abutment on the locking surface 222 to the first end 2221, the correspondingThe greater the corresponding maximum static friction force, the smaller the corresponding maximum static friction force, the more difficult the relative self-locking, the closer the position of the locking block 1321 abutting on the locking surface 222 is to the second end 2222, the corresponding +.>The smaller the corresponding maximum static friction force is, the more easily self-locking is formed.
The end of the rod is tapered to gradually push the locking piece 1321 toward the locking surface 222 during the process of entering the mounting port 121. When the first end 2221 is closer to the locking piece 1321, if the end of the rod is smaller, the moving distance that can push the locking piece 1321 is limited, and the locking piece 1321 may still not abut against the locking surface 222 when the end of the rod completely enters the mounting hole 121. When the second end 2222 is closer to the locking piece 1321, if the end of the lens rod is larger, the locking piece 1321 will be in contact with the locking surface 222 in advance before the end of the lens rod completely enters the mounting opening 121, and at this time, the end of the lens rod will be locked in advance and cannot enter the mounting opening 121 further. The above-mentioned situations are caused by that the relative position relationship between the locking surface 222 and the end of the guide groove 132 cannot be matched with the dimension specification of the lens stem in the process that the end of the lens stem enters the mounting opening 121, and in order to solve the above-mentioned problems, the upper cover 2 needs to be manually rotated to additionally and separately provide the rotation moment of the upper cover 2 to overcome. Conversely, when the end of the mirror rod needs to be removed from the mounting opening 121, the upper cover 2 may be manually turned, so that the first end 2221 rotates toward the end of the guide groove 132, and a gap is further formed between the locking block 1321 and the locking surface 222, so as to allow the locking block 1321 to further move away from the mounting opening 121, and further separate the locking block 1321 from the end of the mirror rod, and then release the locked state of the end of the mirror rod. After the end of the rod is disengaged from the mounting port 121, the second end 2222 may be turned toward the end of the guide slot 132 so that the locking surface 222 pushes the locking block 1321 back into the mounting port 121.
Referring to fig. 6-7, when the end of the lens rod is in the mounting opening 121 and a rotational moment of the second end 2222 turning to the locking block 1321 is applied to the upper cover 2, the locking block 1321 further presses the end of the lens rod, so as to improve the locking stability of the end of the lens rod. Conversely, if the upper cover 2 is disturbed during use of the endoscope, a rotational moment of the first end 2221 turning to the locking block 1321 is generated, the locking stability of the locking block 1321 to the end of the lens lever is damaged, resulting in non-manual unlocking of the lens lever.
In order to reduce the occurrence of the non-artificial unlocking condition and improve the locking stability of the end part of the mirror rod, an elastic piece 3 is arranged between the base 1 and the upper cover 2, specifically, a first pin 31 is fixedly arranged on the upper surface of the bottom plate 11, a pin hole 223 is formed in the bottom of the side plate 22, a second pin 32 is fixedly arranged in the pin hole 223, the elastic piece 3 is a tension spring, and two ends of the elastic piece 3 are respectively hooked between the first pin 31 and the second pin 32. The elastic member 3 is always in a stretched state, so as to provide an acting force to the upper cover 2, and the acting force is directed to the locking block 1321 from the second end 2222, and the corresponding elastic member 3 additionally provides a rotation moment for the second end 2222 to turn toward the locking block 1321 to the upper cover 2, so that stability of the end part of the lens rod in the mounting opening 121 is effectively improved.
In order to make the locking block 1321 abut against any portion of the locking surface 222 (corresponding to the mirror rods with different dimensions), the elastic member 3 can provide the rotation moment for the second end 2222 to turn to the locking block 1321 for the upper cover 2, so that the elastic member 3 can always promote the self-locking effect of the end portion of the mirror rod, and it is necessary to ensure that the elastic member 3 is always in a stretched state. The base 1 of the present embodiment is provided with a first stopper 133, and the upper cover 2 is provided with a second stopper 224, specifically, the first stopper 133 is located on the annular plate 13, and the second stopper 224 is located at the inner wall surface of the side plate 22 and is substantially in the same plane with the locking surface 222. When the first end 2221 turns to the locking piece 1321, the first stopper 133 turns to the second stopper 224, the first stopper 133 gradually approaches the second stopper 224, and the elastic member 3 gradually returns, and the turning moment of the second end 2222 provided by the elastic member 3 to the upper cover 2 turns to the locking piece 1321 gradually decreases. However, when the first stop member 133 abuts against the second stop member 224, the first end 2221 is located at the locking block 1321, and the elastic member 3 is still in a stretched state, and the upper cover 2 cannot further rotate under the action of the mutual blocking between the first stop member 133 and the second stop member 224, so that the elastic member 3 cannot fully recover, thereby ensuring that the elastic member 3 is always in a stretched state. The first stop member 133 and the second stop member 224 cooperate to limit the rotation angle of the upper cover 2, so that the end of the guide groove 132 is always aligned with the locking surface 222, and the condition that the locking block 1321 cannot contact the locking surface 222 is avoided.
In this embodiment, the upper cover 2 is provided with a sliding groove 211, and the sliding groove 211 also extends along the circumferential direction of the rotation axis, and the extending direction of the sliding groove is matched with the extending direction of the locking surface 222. More specifically, the sliding slot 211 is located on the lower bottom surface of the cover 21, and the top of the locking block 1321 is a protruding point 13211, and the protruding point 13211 is slidably disposed in the sliding slot 211. The inner wall surface of the slide groove 211 may cooperate with the protruding point 13211 to function as the locking surface 222. In some other embodiments, the locking surface 222 may be omitted, and the inner wall surface of the chute 211 may be directly regarded as the locking surface 222 for use.
It will be appreciated that in the case where the locking surface 222 is not the inner wall surface of the sliding groove 211 in the present embodiment, the sliding groove 211 can play a role of safety in the case where the locking surface 222 fails (in this case, the friction coefficient between the protruding point 13211 and the inner wall surface of the sliding groove 211 is also) Simultaneously, under the cooperation of the sliding groove 211 and the protruding point 13211, under the condition that the friction force between the inner wall surface of the sliding groove 211 and the protruding point 13211 is overcome by rotating the upper cover 2, the locking block 1321 can be controlled to move in the direction away from the mounting opening 121 at the guide groove 132 and enter the mounting opening 121, and the sliding groove 211 plays a limiting role on the locking block 1321 through the protruding point 13211, so that the locking block 1321 is prevented from falling into the mounting opening 121.
Preferably, the locking surface 222 is a first arc surface, the outer wall surface of the locking block 1321 facing the locking surface 222 is a second arc surface, and the first arc surface and the second arc surface are mutually matched to allow the upper cover 2 to rotate clockwise or anticlockwise when being manually rotated, so that the occurrence of the blocking condition caused by the mismatch of shapes between the locking block 1321 and the locking surface 222 in the rotating process of the upper cover 2 is reduced.
In this embodiment, the upper cover 2 and the base 1 are enclosed to form a mounting cavity, if foreign matters exist in the mounting opening 121, the foreign matters need to enter the mounting cavity through the guide groove 132, and the guide groove 132 is blocked by the locking block 1321, so that the mounting cavity is a relatively closed cavity as a whole. Therefore, in this embodiment, the locking surface 222 is well protected in the installation cavity, so that the engagement between the locking block 1321 and the locking surface is not easily affected by foreign matters. Similarly, the first rotational surface 221 and the second rotational surface 131 are both located within the mounting cavity.
In addition, the upper cover 2 also shields the guide groove 132 in this embodiment, so that the locking block 1321 is prevented from being separated from the guide groove 132 along the axial direction of the spindle shaft.
Before the upper cover 2 is covered on the base 1, one end of the elastic member 3 needs to be hooked on the first pin 31, and after the upper cover 2 is covered, the other end of the elastic member 3 needs to be hooked on the second pin 32. However, when the elastic member 3 is hooked to the second pin 32, the elastic member 3 is already located in the installation cavity, and thus the operation window 112 is opened on the side wall of the installation cavity in this embodiment, more specifically, the operation window 112 is located on the bottom plate 11, and the elastic member 3, the first pin 31 and the second pin 32 are located between the bottom plate 11 and the annular plate 13, and the end portion of the elastic member 3 is hooked to the second pin 32 through the operation window 112.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The locking device is characterized by comprising a base and an upper cover;
the base is provided with a guide groove, and a locking block is movably arranged in the guide groove;
the upper cover is provided with a plurality of locking surfaces, and the upper cover is movably arranged on the base so that the locking block can be abutted against the locking surfaces;
when the locking block is abutted against the locking surface, the extending direction of the guide groove is a first straight line direction, the normal direction of the locking surface contacting the locking block part is a second straight line direction, and the included angle between the first straight line direction and the second straight line direction isThe friction coefficient between the locking block and the locking surface is +.>Satisfy->。
2. The locking device of claim 1, wherein the base has an axis of rotation about which the cover rotates on the base, the locking surface extending circumferentially about the axis of rotation and having a first end and a second end, the spacing between the locking surface and the axis of rotation decreasing in a direction in which the first end points toward the second end.
3. The locking device according to claim 2, wherein an elastic member is provided between the base and the upper cover, and the elastic member provides a force to the upper cover that the second end points in the direction of the lock block when the lock block abuts on the lock surface.
4. A locking device according to claim 3, wherein a first stop is provided on the base and a second stop is provided on the upper cover, the first stop being turned towards the second stop when the first end is turned towards the locking block, the resilient member providing a force to the upper cover that the second end is directed towards the locking block when the first stop is abutted against the second stop.
5. The locking device according to claim 2, characterized in that the upper cover is provided with a chute, the direction of extension of which matches the direction of extension of the locking surface, the locking block being at least partially located in the chute.
6. The locking device of claim 5, wherein the locking surface is a portion of an inner wall surface of the chute.
7. The locking device of claim 2, wherein the guide slot extends radially of the rotational axis.
8. The locking device of claim 2, wherein the locking surface is a first arcuate surface and the outer wall surface of the locking block facing the locking surface is a second arcuate surface.
9. The locking device of claim 2, wherein the upper cover and the base enclose a mounting cavity, and wherein the locking surface is located within the mounting cavity.
10. The locking device of claim 9, wherein the upper cover has a first rotating surface, the base has a second rotating surface, the first rotating surface and the second rotating surface are cylindrical surfaces taking the rotating axis as an axis, and the first rotating surface and the second rotating surface are attached and are located in the installation cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311080291.5A CN116794826B (en) | 2023-08-25 | 2023-08-25 | Locking device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311080291.5A CN116794826B (en) | 2023-08-25 | 2023-08-25 | Locking device |
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| CN116794826A CN116794826A (en) | 2023-09-22 |
| CN116794826B true CN116794826B (en) | 2023-11-07 |
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| CN202311080291.5A Active CN116794826B (en) | 2023-08-25 | 2023-08-25 | Locking device |
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| CN105020548A (en) * | 2014-04-24 | 2015-11-04 | 欧达尔医疗系统有限责任公司 | Rotatable connection device with limitation of the rotational angle |
| CN211287054U (en) * | 2019-10-11 | 2020-08-18 | 云丁网络技术(北京)有限公司 | Lock body and locking assembly thereof |
| CN213429969U (en) * | 2020-06-24 | 2021-06-15 | 杭州堃博生物科技有限公司 | Medical endoscope handle with telescopic locking mechanism |
| WO2022100101A1 (en) * | 2020-11-16 | 2022-05-19 | 深圳市吉迩科技有限公司 | Atomizing core locking method and device and aerosol generating device |
| CN112603250A (en) * | 2020-12-24 | 2021-04-06 | 南微医学科技股份有限公司 | Steering locking device and endoscope |
| CN113648165A (en) * | 2021-08-31 | 2021-11-16 | 南京迈瑞生物医疗电子有限公司 | Locking mechanism, table top assembly, operating table and locking method of table top assembly |
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| CN116794826A (en) | 2023-09-22 |
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