Rotary locking handle and low-temperature preservation box comprising same

Abstract

The utility model relates to a rotary locking handle and a low-temperature storage box comprising the same, and belongs to the technical field of low-temperature equipment. The rotary locking handle comprises a lock cylinder assembly, a handle mounting assembly and a handle assembly, the lock cylinder assembly comprises a lock cylinder fixing seat and a lock cylinder column. The handle mounting assembly comprises a rotating shaft fixing seat and a rotating shaft; the handle assembly comprises a rotary locking part and a handle part; the rotary locking part is provided with a containing groove, a shaft sleeve connected with the rotary shaft in a sleeving mode is eccentrically arranged in the containing groove, the rotary locking part rotates between a first position and a second position, and the containing groove is provided with an opening; when the rotary locking part is located at the first position, the groove wall of the containing groove abuts against and is locked with the lock cylinder column. When the rotary locking part is located at the second position, the lock cylinder column is located at the opening; a matching face matched with the lock cylinder column is formed on the groove wall of the containing groove, the matching face comprises a plurality of arc column faces connected in sequence, and the radiuses of the arc column faces from the opening position to the locking position are sequentially reduced. The rotary locking handle can ensure locking and is high in reliability.

Description

Technical Field

[0001] This utility model belongs to the field of cryogenic equipment technology, and in particular relates to a rotary locking handle and a cryogenic storage box containing the handle. Background Technology

[0002] Low-temperature storage boxes, as basic equipment for storing food and medical supplies that require low-temperature preservation, have been widely used. Because the internal temperature of low-temperature storage boxes is very low, even below -80 degrees Celsius, the doors of these boxes must be tightly locked after closing to maintain the internal temperature.

[0003] Currently, rotary locking handles are commonly used to ensure door locking. For example, patent CN217380052U discloses a labor-saving ultra-low temperature freezer rotary handle. The handle body is hinged to a mounting base on the door body via a pin. The lower back of the handle body is provided with a guide groove. The inner side of the guide groove is curved, and an arc-shaped rib is provided in the middle of the guide groove so that the channel formed between the side of the guide groove and the arc-shaped rib is flared outwards and inwards. When closing the door, rotating the handle body causes the locking pin to slide into the channel to achieve locking. However, in this rotary handle, the arc-shaped rib and the side of the guide groove cooperate to form a flared channel. The arc-shaped rib is used to press the locking pin to ensure locking. When used for a long time or frequently opened and closed, the arc-shaped rib is easily deformed, causing the locking pin to slip out of the channel, resulting in a problem of poor sealing.

[0004] Therefore, how to provide a more reliable rotary locking handle is a technical problem that urgently needs to be solved. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a rotary locking handle and a low-temperature storage box containing the same. The rotary locking handle ensures a secure lock and has high reliability.

[0006] This utility model provides a rotary locking handle, comprising:

[0007] A lock cylinder assembly, comprising a lock cylinder mounting base and a lock cylinder pin disposed on the lock cylinder mounting base;

[0008] A handle mounting assembly is arranged side-by-side on the side of the lock cylinder assembly, and includes a pivot mounting base and a pivot mounted on the pivot mounting base;

[0009] A handle assembly, disposed relative to the lock cylinder assembly and the handle mounting assembly, includes:

[0010] The rotating locking part has a receiving groove for accommodating the lock cylinder assembly and the handle mounting assembly on the side facing the lock cylinder assembly and the handle mounting assembly. A bushing that engages with the rotating shaft is eccentrically arranged in the receiving groove. The rotating locking part rotates relative to the rotating shaft between a first position and a second position. The receiving groove has an opening for the lock cylinder pin to enter or exit the receiving groove.

[0011] A handle is connected to a rotary locking part to drive the rotary locking part to rotate;

[0012] When the rotating locking part is in the first position, the lock cylinder is located in the receiving groove, and the groove wall of the receiving groove away from the bushing abuts against the lock cylinder to lock the lock cylinder; when the rotating locking part is in the second position, the lock cylinder is located at the opening; the groove wall of the receiving groove forms a mating surface for sliding or rolling engagement with the lock cylinder from the locking position for locking and abutting the lock cylinder to the opening. The mating surface includes a plurality of arc cylindrical surfaces that are connected in sequence and smoothly transitioned. The arc cylindrical surfaces are all based on the axis of the rotating shaft as the generatrix. The radius of the arc cylindrical surface corresponding to the arc cylindrical surface from the opening to the locking position decreases in sequence. During the rotation of the rotating locking part from the second position to the first position, the lock cylinder moves along the mating surface.

[0013] In this technical solution, a receiving groove is provided in the rotating locking part of the handle assembly to accommodate the lock cylinder assembly and the handle mounting assembly. A mating surface composed of multiple sequentially connected arc cylindrical surfaces is provided on the groove wall of the receiving groove to mate with the lock cylinder post of the lock cylinder assembly. By setting these arc cylindrical surfaces to have a radius that decreases sequentially from the opening to the locking position, when the rotating locking part rotates from the second position to the first position, the mating surface presses the lock cylinder post in the direction close to the rotating shaft, which can ensure the locking of the lock cylinder post and has high reliability.

[0014] In some embodiments, the mating surface is provided with a stop protrusion protruding into the receiving groove. When the rotary locking part rotates to a third position, which is between the first and second positions and close to the first position, the stop protrusion abuts against the lock cylinder to prevent the rotary locking part from freely rotating toward the second position without external force. This technical solution, by providing a stop protrusion on the mating surface, can limit the rotation angle within a controllable range when the handle assembly accidentally rotates due to external force interference, thereby preventing the lock cylinder from accidentally disengaging.

[0015] In some embodiments, the rotary locking handle further includes a magnetic door switch. The magnetic door switch includes a switch for issuing lock-on and lock-off signals, and a magnet for generating a magnetic response with the switch. The switch is mounted on a rotating shaft mounting base, and the magnet is mounted in a receiving groove. When the rotating locking part is in a first position, the magnet and switch generate a magnetic response, causing the switch to issue a lock-off signal. When the rotating locking part is rotated to a third position, the magnetic response between the magnet and switch disappears, causing the switch to issue a lock-on signal. This technical solution, through the magnetic door switch, can monitor the status of the rotary locking handle in real time and promptly issue a lock-on signal in case of accidental unlocking to alert the user.

[0016] In some embodiments, the bushing has a limiting boss at its axial outer end, and the rotating shaft has an abutting boss on its outer periphery. The limiting boss and the abutting boss are positioned opposite each other on both sides of the rotating shaft. When the rotating locking part rotates to the first position, one end of the limiting boss abuts against one end of the abutting boss. When the rotating locking part rotates to the second position, the other end of the limiting boss abuts against the other end of the abutting boss. This technical solution, through the cooperation of the limiting boss and the abutting boss, can precisely limit the rotation angle of the rotating locking part, avoiding misalignment or damage between the lock cylinder and the mating surface due to excessive rotation.

[0017] In some embodiments, the rotating locking part has a mounting port on the side opposite to the lock cylinder assembly and the handle mounting assembly for mounting the rotating shaft to the bushing. The mounting port has a cover plate for covering the mounting port, and the cover plate is interference-fitted into the rotating locking part. This technical solution facilitates the mounting of the rotating shaft to the bushing through the provided mounting port.

[0018] In some embodiments, the cover plate is provided with a locking element. The mounting edge has a slot for inserting the locking element and a latch for interference fit with the locking element. The latch and slot are connected, allowing the locking element to rotate from the slot into the latch when the cover plate rotates. A guide portion is provided on the side of the locking element away from the latch, and the guide portion has an inclined surface that slides against the edge of the slot to disengage the locking element from the slot. In this technical solution, the engagement of the locking element with the slot and the latch facilitates the installation and removal of the cover plate.

[0019] In some embodiments, a mechanical lock is installed on the groove wall opposite to the handle mounting assembly on the side of the receiving groove for locking the rotary locking part to the rotating shaft fixing seat when the rotary locking part is in the first position. This technical solution improves security through the mechanical lock.

[0020] In some embodiments, the rotating shaft mounting base is provided with a locking hole; the mechanical lock includes:

[0021] The latch, which engages with the keyhole;

[0022] A rotating component, which is rotatably connected to the wall of the receiving groove;

[0023] The driving component is used to drive the reciprocating motion of the lock tongue to insert into or disengage from the lock hole. One end of the driving component is fixedly connected to the rotating component, and the other end is movably connected to the axial end of the lock tongue away from the lock hole.

[0024] In some embodiments, the lock cylinder assembly further includes a padlock connector disposed on the lock cylinder mounting base. The padlock connector has a first padlock hole for installing a padlock. When the rotating locking part is in the first position, a second padlock hole for installing a padlock is provided at the position opposite to the first padlock hole in the groove wall of the receiving groove. This technical solution achieves locking of the rotating locking part and the lock cylinder assembly by having the padlock pass through both the first and second padlock holes simultaneously, further improving security.

[0025] In addition, this utility model also provides a cryogenic storage box, including a box body and a door connected to the box body, and also includes the rotary locking handle described in any of the above technical solutions. The lock cylinder fixing seat is installed in the box body, and the rotating shaft fixing seat is installed in the door. This cryogenic storage box uses the rotary locking handle described in any of the above technical solutions, and its door can be tightly locked after closing, providing good sealing performance.

[0026] Based on the above technical solution, the rotary locking handle provided by this utility model has a receiving groove in the rotary locking part of the handle assembly, and a mating surface is provided on the groove wall of the receiving groove to cooperate with the lock cylinder post of the lock cylinder assembly. This ensures that when the rotary locking part rotates from the second position to the first position, the lock cylinder post is pressed by the mating surface in the direction close to the rotating shaft, thus ensuring the locking of the lock cylinder post and providing high reliability. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of the structure of a rotary locking handle provided in one embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the handle assembly in a rotary locking handle according to an embodiment of the present invention;

[0030] Figure 3 A schematic diagram of the structure of the handle mounting assembly in a rotary locking handle according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the lock cylinder assembly in a rotary locking handle according to an embodiment of the present invention;

[0032] Figure 5This is a schematic diagram of the assembly of the handle assembly, lock cylinder, and rotating shaft in the first position of the rotary locking handle provided in one embodiment of the present utility model.

[0033] Figure 6 This is a schematic diagram of the assembly of the handle assembly, lock cylinder, and rotating shaft in the second position of the rotary locking handle provided in one embodiment of the present invention.

[0034] Figure 7 This is a schematic diagram of the assembly of the handle assembly, lock cylinder, and rotating shaft in a rotary locking handle provided in one embodiment of the present invention when the rotary locking part is in the third position;

[0035] Figure 8 This is a schematic diagram of the structure of the handle assembly after removing the cover plate in a rotary locking handle according to an embodiment of the present invention.

[0036] Figure 9 This is a schematic diagram of the structure of the cover plate of the rotary locking handle provided in one embodiment of the present utility model;

[0037] Figure 10 This is a schematic diagram of the assembly of the cover plate and the rotary locking part of the rotary locking handle according to an embodiment of the present invention.

[0038] Figure 11 This is an assembly diagram showing the locked connection between the mechanical lock and the rotating shaft fixing seat in a rotary locking handle according to an embodiment of the present invention.

[0039] Figure 12 This is an assembly diagram showing the unlocked state of the mechanical lock and the rotating shaft fixing seat in a rotary locking handle according to an embodiment of the present utility model.

[0040] Figure 13 This is a schematic diagram of the structure of a low-temperature storage box provided in one embodiment of the present invention.

[0041] In the picture:

[0042] 1. Lock cylinder assembly; 2. Handle mounting assembly; 3. Handle assembly; 4. Mechanical lock; 5. Magnet; 6. Switch; 7. Baffle; 8. Box body; 9. Door body;

[0043] 11. Lock cylinder fixing base; 12. Lock cylinder post; 13. Padlock connector;

[0044] 21. Rotary shaft fixing seat; 22. Rotary shaft; 221. Abutting boss;

[0045] 31. Handle; 32. Rotary locking part; 321. Bushing; 3211. Limiting boss; 33. Cover plate; 331. Clamp; 3311. Outlet part;

[0046] 41. Locking tongue; 42. Rotating component; 43. Driving component;

[0047] a. Lock hole; b. First padlock hole; c. Second padlock hole; d. Receiving groove; e. Mating surface; f. Stop protrusion; g. Mounting port; h. Insertion port; i. Bayonet. Detailed Implementation

[0048] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0049] In the description of this utility model, it should be understood that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0050] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0051] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] As attached Figures 1-6As shown in an illustrative embodiment of the rotary locking handle of this utility model, the rotary locking handle includes a lock cylinder assembly 1, a handle mounting assembly 2, and a handle assembly 3; the lock cylinder assembly 1 includes a lock cylinder fixing seat 11 and a lock cylinder post 12 disposed on the lock cylinder fixing seat 11; the handle mounting assembly 2 is arranged side by side on the lock cylinder assembly 1, and includes a rotating shaft fixing seat 21 and a rotating shaft 22 disposed on the rotating shaft fixing seat 21; the handle assembly 3 is arranged opposite to the lock cylinder assembly 1 and the handle mounting assembly 2, and includes a rotary locking part 32 and a handle part 31; the rotary locking part 32 has a receiving groove d for accommodating the lock cylinder assembly 1 and the handle mounting assembly 2 on the side facing the lock cylinder assembly 1 and the handle mounting assembly 2, and a bushing 321 that engages with the rotating shaft 22 is eccentrically disposed in the receiving groove d; the rotary locking part 32 rotates relative to the rotating shaft 22 between a first position and a second position; the receiving groove d is provided for the lock cylinder post. 12 enters or exits the opening of the receiving groove d; the handle part 31 is connected to the rotating locking part 32 to drive the rotating locking part 32 to rotate; wherein, when the rotating locking part 32 is in the first position, the lock cylinder 12 is located in the receiving groove d, and the groove wall of the receiving groove d away from the bushing 321 abuts against the lock cylinder 12 to lock the lock cylinder 12; when the rotating locking part 32 is in the second position, the lock cylinder 12 is located at the opening; the groove wall of the receiving groove d forms a mating surface e for sliding or rolling engagement with the lock cylinder 12 from the locking position for locking and abutting the lock cylinder 12 to the opening, the mating surface e includes a plurality of arc cylindrical surfaces that are connected in sequence and smoothly transitioned, and the arc cylindrical surfaces are all based on the axis of the rotating shaft 22 as the generatrix, and the radius of the arc cylindrical surface corresponding to the arc cylindrical surface from the opening to the locking position decreases in sequence. During the rotation of the rotating locking part 32 from the second position to the first position, the lock cylinder 12 moves along the mating surface e.

[0053] The working principle of the above-mentioned rotary locking handle is as follows:

[0054] (1) Locking process

[0055] Initially, the rotating locking part 32 of the handle assembly 3 is in the second position. At this time, the lock cylinder post 12 of the lock cylinder assembly 1 is located outside the receiving groove d of the rotating locking part 32 and outside the opening. The handle part 31 of the handle assembly 3 is in a free state. When closing the door, the door body 9 drives the rotating locking part 32 to approach the lock cylinder post 12. The lock cylinder post 12 enters the receiving groove d from the opening. The user holds the handle part 31 to drive the rotating locking part 32 to rotate around the pivot 22 towards the first position. The lock cylinder post 12 contacts the mating surface e of the receiving groove d. As the rotating locking part 32 continues to rotate, the lock cylinder post 12 gradually moves towards the locking position along the mating surface e. Since the mating surface e is composed of multiple arc cylindrical surfaces connected in sequence, the radius of these arc cylindrical surfaces decreases sequentially from the opening to the locking position. Therefore, as the lock cylinder post 12 moves along the mating surface e, it gradually approaches the pivot 22 so that the lock cylinder post 12 is firmly locked in the locking position.

[0056] (2) Unlocking process

[0057] The unlocking process is the reverse of the locking process. The user holds the handle 31 to drive the rotating locking part 32 to rotate around the pivot 22 to the second position. The lock cylinder 12 moves along the mating surface e from the locking position to the opening of the receiving groove d. When the door is opened, the door body 9 drives the rotating locking part 32 away from the lock cylinder 12, so that the lock cylinder 12 is disengaged from the opening of the receiving groove d, thereby disengaging the lock cylinder 12 from the rotating locking part 32 and completing the unlocking.

[0058] The aforementioned rotary locking handle features a receiving groove d in the rotary locking part 32 of the handle assembly 3 to accommodate the lock cylinder assembly 1 and the handle mounting assembly 2. A mating surface e, composed of multiple sequentially connected arcuate cylindrical surfaces, is provided on the groove wall of the receiving groove d to mate with the lock cylinder post 12 of the lock cylinder assembly 1. By setting the radius of these arcuate cylindrical surfaces to decrease sequentially from the opening to the locking position, when the rotary locking part 32 rotates from the second position to the first position, the mating surface e presses the lock cylinder post 12 towards the pivot 22, ensuring the lock cylinder post 12 is locked reliably. Furthermore, the sequentially connected and smoothly transitioning arcuate cylindrical surfaces constituting the mating surface e of the rotary locking handle allow the lock cylinder post 12 to slide in and out more smoothly along the mating surface e, reducing the force required for users to open and close the door and improving the user experience.

[0059] In some embodiments, such as Figure 2 and Figure 7 As shown, the mating surface e is provided with a stop protrusion f protruding into the receiving groove d. When the rotary locking part 32 rotates to a third position, which is between the first and second positions and close to the first position, the stop protrusion f abuts against the lock cylinder 12 to prevent the rotary locking part 32 from freely rotating towards the second position without external force. By providing the stop protrusion f on the mating surface e, the rotation angle can be limited to a controllable range when the handle assembly 3 is accidentally rotated due to external force interference, thereby preventing the lock cylinder 12 from accidentally dislodging. When applied to equipment such as cryogenic storage boxes, the degree of accidental opening of the door 9 can be limited to a controllable range, thereby effectively preventing a large amount of cold air loss from the box in a short period of time and further improving the reliability of the rotary locking handle.

[0060] In some embodiments, such as Figure 2 and Figure 3As shown, the rotary locking handle also includes a magnetic door switch. The magnetic door switch includes a switch 6 for sending lock / unlock signals and a magnet 5 for generating a magnetic response with the switch 6. The switch 6 is mounted on the rotating shaft mounting base 21, and the magnet 5 is mounted in the receiving groove d. When the rotating locking part 32 is in the first position, the magnet 5 and the switch 6 generate a magnetic response, causing the switch 6 to send a lock / unlock signal. When the rotating locking part 32 rotates to the third position, the magnetic response between the magnet 5 and the switch 6 disappears, causing the switch 6 to send a lock / unlock signal. Through the magnetic door switch, the status of the rotary locking handle can be monitored in real time, and a lock / unlock signal can be sent promptly in case of accidental unlocking to remind the user. It should be noted that, as... Figure 3 As shown, the rotating shaft mounting base 21 is provided with a baffle 7 for protecting the wiring harness of the switch 6 to ensure the safety of the wiring harness during the use of the rotary locking handle.

[0061] In some embodiments, such as Figure 4 As shown, the lock cylinder 12 is a cam follower. Using a cam follower to engage with the mating surface e of the lock cylinder 12 reduces friction, avoids the risk of locking failure due to wear of the lock cylinder 12, and extends its service life.

[0062] In some embodiments, such as Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the bushing 321 has a limiting boss 3211 on its axial outer end, and the rotating shaft 22 has an abutting boss 221 on its outer periphery. The limiting boss 3211 and the abutting boss 221 are arranged opposite to each other on both sides of the rotating shaft 22. When the rotating locking part 32 rotates to the first position, one end of the limiting boss 3211 abuts against one end of the abutting boss 221. When the rotating locking part 32 rotates to the second position, the other end of the limiting boss 3211 abuts against the other end of the abutting boss 221. Through the cooperation of the limiting boss 3211 and the abutting boss 221, the rotation angle of the rotating locking part 32 can be precisely limited, avoiding misalignment or damage between the lock cylinder 12 and the mating surface e due to excessive rotation.

[0063] In some embodiments, such as Figures 8-10As shown, the rotary locking part 32 has a mounting port g on the side opposite to the lock cylinder assembly 1 and the handle mounting assembly 2 for mounting the rotating shaft 22 to the bushing 321. The mounting port g is provided with a cover plate 33 for covering the mounting port g, and the cover plate 33 is interference-fitted to the rotary locking part 32. The mounting port g facilitates the mounting of the rotating shaft 22 to the bushing 321, and the cover plate 33 is installed to the rotary locking part 32 by interference fit, which facilitates the installation of the cover plate 33. Specifically, in this embodiment, the cover plate 33 is provided with a locking member 331. The edge of the mounting opening g is provided with a slot h for inserting the locking member 331. The edge of the mounting opening g is also provided with a slot i for interference fit with the locking member 331. The slot i is connected to the slot h so that when the cover plate 33 rotates, the locking member 331 rotates from the slot h into the slot i. Through the interlocking action of the locking member 331 and the slot i, the cover plate 33 and the rotating locking part 32 are interference fit. It should be noted that, in order to facilitate the disassembly of the cover plate 33, the side of the locking member 331 away from the slot i is provided with a guide part 3311. The guide part 3311 has an inclined surface that slides with the edge of the slot h to allow the locking member 331 to disengage from the slot h.

[0064] In some embodiments, such as Figure 1 As shown, a mechanical lock 4 is installed on the groove wall opposite to the handle mounting assembly 2 on the receiving groove d. This mechanical lock 4 locks the rotary locking part 32 to the rotating shaft fixing seat 21 when the rotary locking part 32 is in the first position. By providing a mechanical lock 4 that is opened with a special key to lock the rotary locking part 32 to the rotating shaft fixing seat 21, only personnel with the special key can unlock the rotary locking part 32 from the rotating shaft fixing seat 21, allowing the rotary locking part 32 to be rotated open, thus improving security.

[0065] Specifically, such as Figure 3 , Figure 11 and Figure 12 As shown, the rotating shaft fixing seat 21 is provided with a lock hole a; the mechanical lock 4 includes a lock tongue 41, a rotating component 42, and a driving component 43; the lock tongue 41 cooperates with the lock hole a; the rotating component 42 is rotatably connected to the wall of the receiving groove d; the driving component 43 is used to drive the lock tongue 41 to reciprocate to insert into or disengage from the lock hole a, one end of the driving component 43 is fixedly connected to the rotating component 42, and the other end is movably connected to the axial end of the lock tongue 41 away from the lock hole a. This mechanical lock 4, through the cooperation of the rotating component 42 and the driving component 43, allows for easy insertion and removal of the lock tongue 41, achieving rapid locking and unlocking, and is simple and reliable in structure.

[0066] In some embodiments, such as Figure 2 and Figure 4As shown, the lock cylinder assembly 1 also includes a padlock connector 13 disposed on the lock cylinder fixing base 11. The padlock connector 13 has a first padlock hole b for installing a padlock. When the rotating locking part 32 is in the first position, a second padlock hole c for installing a padlock is provided at the position opposite to the first padlock hole b in the groove wall of the receiving groove d. By passing the padlock through both the first padlock hole b and the second padlock hole c, the rotating locking part 32 and the lock cylinder assembly 1 can be locked, further improving security.

[0067] Based on the aforementioned rotary locking handle, this utility model also provides a cryogenic storage box, including a box body 8 and a door 9 connected to the box body 8, and also including the aforementioned rotary locking handle. A lock cylinder fixing seat 11 is installed on the box body 8, and a rotating shaft fixing seat 21 is installed on the door 9. This cryogenic storage box, using the aforementioned rotary locking handle, ensures that the door 9 can be tightly locked after closing, providing good sealing and guaranteeing the safety of samples inside the cryogenic storage box.

[0068] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0069] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A rotary locking handle, characterized in that, include: A lock cylinder assembly, comprising a lock cylinder mounting base and a lock cylinder pin disposed on the lock cylinder mounting base; A handle mounting assembly is arranged side-by-side on the side of the lock cylinder assembly, and includes a pivot fixing seat and a pivot disposed on the pivot fixing seat; A handle assembly, disposed opposite to the lock cylinder assembly and the handle mounting assembly, includes: The rotating locking part has a receiving groove on the side facing the lock cylinder assembly and the handle mounting assembly for accommodating the lock cylinder assembly and the handle mounting assembly. A bushing that engages with the rotating shaft is eccentrically disposed in the receiving groove. The rotating locking part rotates relative to the rotating shaft between a first position and a second position. The receiving groove has an opening for the lock cylinder pin to enter or exit the receiving groove. A handle portion, which is connected to the rotary locking portion to drive the rotary locking portion to rotate; When the rotating locking part is in the first position, the lock cylinder is located in the receiving groove, and the groove wall of the receiving groove away from the bushing abuts against the lock cylinder to lock the lock cylinder; when the rotating locking part is in the second position, the lock cylinder is located at the opening; the groove wall of the receiving groove forms a mating surface for sliding or rolling engagement with the lock cylinder from the locking position for locking against the lock cylinder to the opening, the mating surface includes a plurality of sequentially connected and smoothly transitioned arc cylindrical surfaces, each arc cylindrical surface having the axis of the rotating shaft as its generatrix, and the radius corresponding to the arc cylindrical surface from the opening to the locking position decreases sequentially, and the lock cylinder moves along the mating surface during the rotation of the rotating locking part from the second position to the first position.

2. The rotary locking handle according to claim 1, characterized in that, The mating surface is provided with a stop protrusion protruding into the receiving groove. When the rotary locking part rotates to a third position located between the first position and the second position and close to the first position, the stop protrusion abuts against the lock cylinder to prevent the rotary locking part from freely rotating toward the second position without external force.

3. The rotary locking handle according to claim 2, characterized in that, The rotary locking handle also includes a door magnetic switch, which includes a switch for sending a lock open signal and a lock close signal, and a magnet for generating a magnetic response with the switch. The switch is mounted on the rotating shaft fixing seat, and the magnet is mounted in the receiving groove. When the rotating locking part is in the first position, the magnet and the switch generate a magnetic response to cause the switch to issue the lock-off signal; when the rotating locking part rotates to the third position, the magnetic response between the magnet and the switch disappears to cause the switch to issue the lock-on signal.

4. The rotary locking handle according to claim 1, characterized in that, The bushing has a limiting boss at its axial outer end and an abutting boss on its outer circumference. The limiting boss and the abutting boss are disposed opposite to each other on both sides of the rotating shaft. When the rotating locking part rotates to the first position, one end of the limiting boss abuts against one end of the abutting boss. When the rotating locking part rotates to the second position, the other end of the limiting boss abuts against the other end of the abutting boss.

5. The rotary locking handle according to claim 1, characterized in that, The rotating locking part has a mounting port on the side opposite to the lock cylinder assembly and the handle mounting assembly for mounting the rotating shaft to the bushing. The mounting port has a cover plate for covering the mounting port, and the cover plate is interference-fitted to the rotating locking part.

6. The rotary locking handle according to claim 5, characterized in that, The cover plate is provided with a locking element. The edge of the mounting port is provided with a socket for inserting the locking element and a locking slot for interference engagement with the locking element. The locking slot is connected to the socket so that the locking element can be rotated from the socket into the locking slot when the cover plate is rotated. The side of the locking element away from the locking slot is provided with a guide portion. The guide portion has an inclined surface that slides with the edge of the socket to disengage the locking element from the socket.

7. The rotary locking handle according to claim 1, characterized in that, The groove wall on the side opposite to the handle mounting assembly is equipped with a mechanical lock for locking the rotary locking part to the rotating shaft fixing seat when the rotary locking part is in the first position.

8. The rotary locking handle according to claim 7, characterized in that, The rotating shaft mounting base is provided with a locking hole; the mechanical lock includes: A latch that engages with the keyhole; A rotating component, which is rotatably connected to the wall of the receiving groove; A driving member is used to drive the bolt to reciprocate to insert into or disengage from the lock hole. One end of the driving member is fixedly connected to the rotating member, and the other end is movably connected to the axial end of the bolt away from the lock hole.

9. The rotary locking handle according to claim 1, characterized in that, The lock cylinder assembly further includes a padlock connector disposed on the lock cylinder fixing seat, the padlock connector having a first padlock hole for installing a padlock; when the rotating locking part is located in the first position, a second padlock hole for installing a padlock is provided at the position opposite to the first padlock hole in the groove wall of the receiving groove.

10. A low-temperature storage box, comprising a box body and a door connected to the box body, characterized in that, It also includes the rotary locking handle as described in any one of claims 1-9, wherein the lock cylinder fixing seat is installed on the housing and the pivot fixing seat is installed on the door.

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