Door handle safety lock

Abstract

The utility model provides a door handle safety lock, including base, adsorption unit and telescopic fender, adsorption unit is suitable for adsorbing and fixing door panel with base, telescopic fender sets up in base, including a plurality of unit pole and being suitable for driving unit pole to stretch the spring of nesting in sequence along the axial direction, telescopic fender has unfolding state and contraction state: in unfolding state, telescopic fender extends to the rotation path of door handle to block its rotation, in contraction state, telescopic fender has the shortest axial length, and telescopic fender is separated from the rotation path of door handle. The utility model passes through the telescopic fender design of adjustable length and allows or restricts the rotation of door handle.

Description

Technical Field

[0001] This utility model belongs to the field of door handle technology, and in particular relates to a door handle safety lock. Background Technology

[0002] In homes and offices, door handle safety locks are commonly used protective devices to prevent children from accidentally opening doors, pets from wandering out on their own, or unauthorized personnel from opening doors. Furthermore, in tourist accommodations such as hotels and guesthouses, the need for temporary security for room doors is particularly prominent. Currently, the core structure of conventional door handle safety locks mostly relies on a folding baffle to achieve function switching: in the working state, the baffle folds into the rotation path of the door handle, physically restricting the door handle's rotation; in the retracted state, the baffle folds in the opposite direction, disengaging from the door handle's rotation path to minimize impact on normal use.

[0003] These types of security locks are mostly installed by adhesive bonding, that is, by using double-sided adhesive or other adhesives to stick the lock body base to the door panel surface; at the same time, the length of the baffle is fixed and cannot be adjusted according to the size, shape or rotation radius of the door handle.

[0004] However, conventional structures have significant limitations: First, the reliability of adhesive installation is greatly affected by ambient temperature, humidity, and door panel material, and is prone to detachment with long-term use. Furthermore, adhesive residue may remain during removal, damaging the door panel's paint. The installation method itself can easily damage the door panel, failing to meet the temporary needs of short-term accommodation. Second, the baffle length is not adjustable, making it difficult to accommodate different sizes of door handles (such as long-handled or irregularly shaped handles), creating a security vulnerability. Third, even when folded, the baffle still occupies space near the door handle, potentially causing the user's hand or wrist to bump against it when turning the handle, affecting operational smoothness, especially for children and the elderly. Fourth, the product is bulky when folded, making it inconvenient to carry in a backpack, failing to meet the portability needs of travelers. During transport, vibrations can easily cause the locking mechanism to unlock unexpectedly, expanding the structure and taking up space, potentially damaging other items. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a door handle safety lock that solves the following problems: 1. Insufficient applicability due to the fixed length of the baffle; 2. Reliability and compatibility issues of adhesive installation; 3. Space occupation issues in the storage state, so as to meet the needs of users.

[0006] To achieve the above objectives, this utility model provides a door handle safety lock, including...

[0007] The base, serving as the installation foundation and structural carrier of the entire safety lock, provides fixed support for the adsorption unit and telescopic stop bar.

[0008] An adsorption unit is suitable for adsorbing and fixing the base to the door panel, achieving non-destructive fixing between the base and the door panel through adsorption force, and is compatible with various door panel materials such as wood, metal, and glass.

[0009] A telescopic stop bar, which is set on the base, includes a number of unit bars nested in sequence along the axial direction and a spring suitable for driving the unit bars to extend. The spring provides automatic extension power for the telescopic stop bar, eliminating the need for manual full extension, making operation more convenient, and ensuring that the stop bar always maintains a blocking force on the door handle when extended.

[0010] The telescopic stop has an extended state and a retracted state:

[0011] In the unfolded state, the telescopic stop extends into the rotation path of the door handle to prevent it from rotating;

[0012] In the retracted state, the telescopic stop has the shortest axial length, and the telescopic stop is disengaged from the door handle's rotation path.

[0013] Preferably, the telescopic stop bar extends and retracts in a direction perpendicular to the door panel, which can directly form a vertical interference with the rotation plane of the door handle (usually parallel to the door panel), making the blocking effect more direct and reliable, avoiding blocking failure due to directional deviation, and reducing the space occupied in the door panel plane.

[0014] Preferably, a locking mechanism is provided between each pair of adjacent unit rods in each group. The locking mechanism is adapted to lock the two adjacent unit rods in a nested relative position, and the spring is kept in a compressed state.

[0015] In the extended state, at least one of the locking mechanisms is unlocked; the unlocking of multiple locking mechanisms allows the telescopic stop bar to be at and maintain its maximum axial length; in the retracted state, multiple locking mechanisms are locked. That is, in the locked state, the relative positions of adjacent unit bars are fixed, keeping the telescopic stop bar at its shortest length (retracted state) to prevent accidental extension due to spring force; in the unlocked state, the unit bars are released, the spring drives the extension, and the extension length can be adjusted by partial unlocking (to adapt to different door handle sizes), while when fully unlocked, the maximum length is maintained, ensuring effective blocking of large door handles.

[0016] Preferably, the locking mechanism includes a locking region and a locking block. When the locking block is screwed into the locking region, the locking region and the locking block are adapted to form an axial limit, and the locking mechanism is in a locked state. When the locking block is completely screwed out of the locking region, the locking mechanism can switch from the locked state to the unlocked state.

[0017] The locking area includes an open end and a closed end. The locking block can be screwed in / out through the open end, and the closed end is adapted to abut against the locking block to indicate that it is screwed in.

[0018] Preferably, one of the locking area and the locking block includes a locking protrusion, and the other of the locking area and the locking block includes a locking groove. The locking protrusion engages with the locking groove to restrict the relative rotation of the locking area and the locking block, preventing the locking block from accidentally rotating out under external forces such as vibration and collision, ensuring a stable locking state, and avoiding malfunction of the telescopic stop.

[0019] Preferably, the locking protrusion and the locking groove engage axially along the telescopic stop.

[0020] Preferably, the telescopic stop includes a first unit rod, a second unit rod, and a third unit rod. The first unit rod is fixed to the base, the second unit rod is nested inside the first unit rod, and the third unit rod is nested inside the second unit rod. The first unit rod is connected to a base, and the two ends of the spring abut against the base and the third unit rod, respectively.

[0021] Preferably, the third unit rod and the base are respectively provided with abutment seats, the first unit rod is integrally formed on the base, the base includes a buckle, the first unit rod includes a buckle groove, the base and the first unit rod are inserted into each other along their axial direction, and the buckle and the buckle groove are engaged to prevent separation. This arrangement allows the spring to be inserted into the telescopic stop rod from the first unit rod.

[0022] Preferably, the third unit rod is connected to a cap, which is adapted to close one end of the third unit rod and provide a gripping area.

[0023] Preferably, the inner peripheral wall of the first unit rod is provided with a first stop ring, a first guide post and the locking area, and the first guide post extends along the axial direction of the first unit rod; the second unit rod includes a first guide arc protruding from one end of its outer peripheral wall, and the first guide arc moves synchronously with the locking block.

[0024] The first guide arc is rotatable to abut against the first guide post to indicate that the locking block is fully rotated out of the locking area. The first guide arc slides with the first guide post to guide the extension and retraction direction of the second unit rod. The first stop ring is adapted to abut against the first guide arc to limit the extension distance of the second unit rod.

[0025] Preferably, the locking block is disposed on the first guide arc, the two ends of the first guide arc have a first active guide surface, one side of the first guide post is adapted to form a first passive guide surface, and the inner peripheral wall of the first unit rod is also provided with another first passive guide surface. The two first passive guide surfaces simultaneously slide and cooperate with the two first active guide surfaces to guide the extension and retraction direction of the second unit rod, forming a bidirectional limit, further restricting the circumferential displacement of the second unit rod, ensuring the stability of the extension and retraction direction, and improving the smoothness of extension and retraction and the structural stability.

[0026] Preferably, a first stop ring is disposed at one axial end of the first unit rod, and the first stop ring forms another locking area. The locking block can be inserted into the locking area in the first stop ring along the axial direction of the second unit rod, providing temporary positioning for the locking block, preventing it from shaking or being damaged by collision, and preventing accidental screwing in that could lead to mis-locking, thereby improving safety in use.

[0027] Preferably, the inner peripheral wall of the second unit rod is provided with a second stop ring and two second guide posts. One end of the second guide post is connected to the second stop ring, and the other end of the second guide post forms the locking area. The second guide post extends along the axial direction of the second unit rod, and a second sliding area is defined between the two second guide posts.

[0028] The outer peripheral wall of the third unit rod is provided with two centrally symmetrical second guide arcs, and the locking block is formed at one end of the second guide arc.

[0029] When the second guide arc drives the locking block to completely exit the locking area, the second guide arc aligns with the second sliding area, and the spring is adapted to drive the second guide arc to slide within the second sliding area to guide the extension and retraction direction of the third unit rod.

[0030] The second stop ring abuts against the second guide arc to limit the extension distance of the third unit rod.

[0031] Preferably, the adsorption unit includes an elastic adsorption sheet and a driving device. The driving device includes a transmission assembly and an operating device. The adsorption sheet and the driving device are respectively disposed on the front and rear sides of the base. The transmission assembly includes a threaded post adapted to connect the adsorption sheet and a threaded sleeve adapted to connect the operating device. The threaded post and the threaded sleeve are threadedly engaged to achieve axial movement. The operating device can drive the adsorption sheet to deform through the transmission assembly to form a negative pressure space. The base can rotate around the axis of the threaded post, taking into account both working and non-working states, and improving the flexibility of use.

[0032] The safety lock includes a working state and a non-working state. In the working state, the base is set perpendicular to the door handle, and the telescopic stop bar can extend to the rotation path of the door handle when it is extended. In the non-working state, the base can be rotated to be set parallel to the door handle, and the telescopic stop bar is away from the door handle.

[0033] The beneficial effects of this utility model are:

[0034] 1. With the adjustable length telescopic stop bar design, the blocking length can be flexibly adjusted according to the actual size and rotation path of the door handle. It can not only ensure effective blocking of large door handles, but also adapt to small or irregularly shaped door handles, thus solving the applicability limitations of conventional fixed length stops.

[0035] 2. Adsorption units (such as negative pressure adsorption) are used instead of adhesive installation, which does not damage the door panel surface. It can be stably fixed to door panels of various materials such as wood, glass, and metal. It is easy to install and remove, ensuring stability during use and avoiding problems such as easy falling off and residual glue that damage the door panel. It is suitable for the temporary use needs of short-term accommodation.

[0036] 3. When the telescopic barrier is in its retracted state, it can be retracted to its shortest axial length. Combined with the base's rotation function (such as rotating it to be parallel to the door handle), it can completely detach from the space near the door handle. Users will not bump into it when turning the door handle. This solves the problem that conventional folding barriers still take up space when stored, and improves the smoothness of opening and closing the door.

[0037] 4. The spring-driven telescopic and locking mechanism allows for quick switching between extended and retracted states, making operation simple. Simultaneously, the multiple locking design (such as the combination of locking protrusions and grooves) ensures stable operation in both working and retracted states, preventing accidental unlocking by children or pets and avoiding accidental unfolding when not in use.

[0038] 5. The telescopic lever adopts a multi-level nested design, combined with the compact structure of the base, resulting in a small overall size. The multiple locking mechanisms can be fully locked in the storage state, ensuring that the telescopic lever maintains its shortest length, making it easy to put into backpacks, handbags, and other carry-on luggage without taking up extra space. Even if it is shaken or bumped inside a backpack, it will not be accidentally unlocked and unfolded, avoiding entanglement with other items or taking up extra space, thus improving carrying safety and convenience. Attached Figure Description

[0039] Figure 1 This is a structural schematic diagram of a door handle safety lock provided by the present invention.

[0040] Figure 2 A partial cross-sectional view (compressed state) of a door handle safety lock provided by this utility model.

[0041] Figure 3A schematic diagram of the structure of a door handle safety lock provided by this utility model (in unfolded state).

[0042] Figure 4 A cross-sectional view (unfolded state) of a door handle safety lock provided by this utility model.

[0043] Figure 5 An exploded view of a door handle safety lock provided by this utility model.

[0044] Figure 6 A schematic diagram of the base provided by this utility model.

[0045] Figure 7 A schematic diagram of the structure of the third unit rod provided by this utility model.

[0046] Figure 8 Rear view of the second unit rod provided by this utility model.

[0047] Figure 9 A schematic diagram of the structure of the second unit rod provided by this utility model.

[0048] Figure 10 This is a structural schematic diagram of the second unit rod provided by this utility model from another angle.

[0049] In the diagram: 100, base; 201, adsorption plate; 202, threaded post; 203, threaded sleeve; 204, operating device; 301, first unit rod; 302, second unit rod; 303, third unit rod; 304, spring; 305, base; 306, buckle; 307, buckle groove; 308, abutment seat; 309, cap; 401, locking area; 402, open end; 403, closed end; 404, locking block; 405, locking protrusion; 406, locking groove; 501, first stop ring; 502, first guide post; 503, first guide arc; 504, first active guide surface; 505, first passive guide surface; 506, second stop ring; 507, second guide post; 508, second sliding area; 509, second guide arc. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0052] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] like Figures 1-10 As shown, a door handle safety lock includes a base 100, an adsorption unit, and a telescopic stop bar. The adsorption unit is adapted to adsorb and fix the base 100 to the door panel, achieving a non-destructive fixation between the base 100 and the door panel through adsorption force. The telescopic stop bar includes a first unit bar 301, a second unit bar 302, and a third unit bar 303 nested in sequence, and a spring 304 adapted to drive the aforementioned unit bars to extend. The first unit bar 301 is fixed to the base 100, the second unit bar 302 is nested inside the first unit bar 301, and the third unit bar 303 is nested inside the second unit bar 302. The first unit bar 301 is connected to a base 305, and the two ends of the spring 304 abut against the base 305 and the third unit bar 303, respectively. A locking mechanism is provided between the first unit bar 301 and the second unit bar 302, and between the second unit bar 302 and the third unit bar 303. The locking mechanism is adapted to lock two adjacent unit bars in the nested relative position, and the spring 304 remains in a compressed state accordingly.

[0054] In this embodiment, the adsorption unit includes an elastic adsorption sheet 201 and a driving device. The driving device includes a transmission assembly and an operating device 204. The adsorption sheet 201 and the driving device are respectively disposed on the front and rear sides of the base 100. The transmission assembly includes a threaded post 202 adapted to connect the adsorption sheet 201 and a threaded sleeve 203 adapted to connect the operating device 204. The threaded post 202 and the threaded sleeve 203 are threadedly engaged to achieve axial movement. The operating device 204 can drive the adsorption sheet 201 to deform through the transmission assembly to form a negative pressure space. The base 100 can rotate around the axis of the threaded post 202.

[0055] In this embodiment, the telescopic stop bar extends and retracts in a direction perpendicular to the door panel, and has an extended state and a retracted state. In the extended state, at least one of its locking mechanisms is in the unlocked state, and the telescopic stop bar extends into the rotation path of the door handle to block its rotation. It can directly form perpendicular interference with the rotation plane of the door handle (usually parallel to the door panel), making the blocking effect more direct and reliable, avoiding blocking failure due to directional deviation, and reducing the space occupied in the door panel plane. The fact that several locking mechanisms are all in the unlocked state allows the telescopic stop bar to be in and maintain its maximum axial length. In the retracted state, several locking mechanisms are all in the locked state, and the telescopic stop bar has its shortest axial length, disengaging from the rotation path of the door handle. That is, in the locked state, the relative positions of adjacent unit bars are fixed, keeping the telescopic stop bar at its shortest length (retracted state), preventing accidental extension caused by the spring force of spring 304; in the unlocked state, the unit bars are released, spring 304 drives the extension, and the extension length can be adjusted by partial unlocking (adapting to different door handle sizes), and when fully unlocked, it maintains its maximum length, ensuring effective blocking of large-sized door handles.

[0056] The safety lock includes a working state and a non-working state. In the working state, the base 100 is set perpendicular to the door handle, and the telescopic rod can extend to the rotation path of the door handle when it is extended. In the non-working state, the base 100 can be rotated to be set parallel to the door handle, and the telescopic rod is away from the door handle.

[0057] In this embodiment, the locking mechanism includes a locking region 401 and a locking block 404. The locking region 401 includes an open end 402 and a closed end 403. The locking block 404 can be screwed in / out through the open end 402. When the locking block 404 is screwed into the locking region 401, the locking region 401 and the locking block 404 are adapted to form an axial limit. The closed end 403 is adapted to abut against the stop locking block 404 to indicate that it is screwed in completely, and the locking mechanism is in a locked state. When the locking block 404 is completely screwed out of the locking region 401, the locking mechanism can switch from the locked state to the unlocked state.

[0058] In this embodiment, one of the locking area 401 and the locking block 404 includes a locking protrusion 405, and the other of the locking area 401 and the locking block 404 includes a locking groove 406. The locking protrusion 405 and the locking groove 406 engage along the axial direction of the telescopic stop bar to restrict the relative rotation of the locking area 401 and the locking block 404, prevent the locking block 404 from accidentally rotating out under external forces such as vibration and collision, ensure the stability of the locking state, and avoid malfunction of the telescopic stop bar.

[0059] In this embodiment, the inner peripheral wall of the first unit rod 301 is provided with a first stop ring 501, a first guide post 502, and a locking area 401, the locking area 401 including a locking groove 406. The first stop ring 501 is disposed at one axial end of the first unit rod 301, and the locking area 401 is disposed at the other axial end of the first unit rod 301. The first guide post 502 extends along the axial direction of the first unit rod 301. The second unit rod 302 includes a first guide arc 503 protruding from one end of its outer peripheral wall, and a locking block 404 is disposed on the first guide arc 503. The locking block 404 includes a locking protrusion 405, and the first guide arc 503 moves synchronously with the locking block 404.

[0060] In this embodiment, the first guide arc 503 is rotatable to abut against the first guide post 502 to indicate that the locking block 404 is fully rotated out of the locking area 401. The two ends of the first guide arc 503 have first active guide surfaces 504, and one side of the first guide post 502 is adapted to form a first passive guide surface 505. The inner peripheral wall of the first unit rod 301 is also provided with another first passive guide surface 505. The two first passive guide surfaces 505 simultaneously slide with the two first active guide surfaces 504 to guide the extension and retraction direction of the second unit rod 302, forming a bidirectional limit, further restricting the circumferential displacement of the second unit rod 302, ensuring the stability of the extension and retraction direction, and improving the smoothness of extension and retraction and structural stability.

[0061] In this embodiment, the first stop ring 501 is adapted to abut against the first guide arc 503 to limit the extension distance of the second unit rod 302. The first stop ring 501 forms another locking area 401. The locking block 404 can be inserted into the locking area 401 in the first stop ring 501 along the axial direction of the second unit rod 302 to provide temporary positioning for the locking block 404, avoid its shaking or collision damage, and at the same time prevent accidental screwing in and mis-locking, thereby improving the safety of use.

[0062] In this embodiment, the inner peripheral wall of the second unit rod 302 is provided with a second stop ring 506 and two second guide posts 507. One end of the second guide post 507 is connected to the second stop ring 506, and the other end of the second guide post 507 forms a locking region 401, which includes a locking protrusion 405. The second guide post 507 extends axially along the second unit rod 302, and a second sliding region 508 is defined between the two second guide posts 507. The outer peripheral wall of the third unit rod 303 is provided with two centrally symmetrical second guide arcs 509. A locking block 404 is formed at one end of the second guide arc 509, and the locking block 404 includes a locking protrusion 405. Similarly, when the locking block 404 is screwed into the locking region 401, the locking region 401 and the locking block 404 are suitable for axial limiting. When the second guide arc 509 drives the locking block 404 to fully retract from the locking area 401, the second guide arc 509 aligns with the second sliding area 508. The spring 304 is adapted to drive the second guide arc 509 to slide within the second sliding area 508 to guide the extension and retraction direction of the third unit rod 303. The second stop ring 506 abuts against the second guide arc 509 to limit the extension distance of the third unit rod 303.

[0063] In this embodiment, abutment seats 308 are respectively provided inside the third unit rod 303 and the base 305. The first unit rod 301 is integrally formed on the base 100. The base 305 includes a buckle 306, and the first unit rod 301 includes a locking groove 307. The base 305 and the first unit rod 301 are inserted into each other along their axial direction. The buckle 306 and the locking groove 307 are engaged to prevent separation. This arrangement allows the spring 304 to be inserted into the telescopic stop bar from the first unit rod 301. The third unit rod 303 is connected to a cap 309, which is adapted to close one end of the third unit rod 303 and provide a gripping part.

[0064] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.

Claims

1. A door handle safety lock, characterized in that, include Base; An adsorption unit adapted to adsorb and fix the base to the door panel; A telescopic stop bar, disposed on the base, includes a plurality of unit rods nested sequentially along the axial direction and a spring adapted to drive the unit rods to extend. The telescopic stop bar has an extended state and a retracted state. In the unfolded state, the telescopic stop extends into the rotation path of the door handle to prevent it from rotating; In the retracted state, the telescopic stop has the shortest axial length, and the telescopic stop is disengaged from the door handle's rotation path.

2. A door handle safety lock according to claim 1, characterized in that, Each pair of adjacent unit rods is provided with a locking mechanism, which is adapted to lock the two adjacent unit rods in a nested relative position, and the spring is kept in a compressed state accordingly; In the extended state, at least one of the locking mechanisms is in the unlocked state; the fact that all of the locking mechanisms are in the unlocked state allows the telescopic stop to be in and maintain its maximum axial length; in the retracted state, all of the locking mechanisms are in the locked state.

3. A door handle safety lock according to claim 2, characterized in that, The locking mechanism includes a locking area and a locking block. When the locking block is screwed into the locking area, the locking area and the locking block are adapted to form an axial limit, and the locking mechanism is in a locked state. When the locking block is completely screwed out of the locking area, the locking mechanism can switch from the locked state to the unlocked state. The locking area includes an open end and a closed end. The locking block can be screwed in / out through the open end, and the closed end is adapted to abut against the locking block to indicate that it is screwed in.

4. A door handle safety lock according to claim 3, characterized in that, One of the locking region and the locking block includes a locking protrusion, and the other of the locking region and the locking block includes a locking groove, wherein the locking protrusion engages with the locking groove to restrict relative rotation between the locking region and the locking block.

5. A door handle safety lock according to claim 4, characterized in that, The telescopic stop bar includes a first unit bar, a second unit bar, and a third unit bar. The first unit bar is fixed to the base, the second unit bar is nested inside the first unit bar, and the third unit bar is nested inside the second unit bar. The first unit bar is connected to a base, and the two ends of the spring abut against the base and the third unit bar, respectively.

6. A door handle safety lock according to claim 5, characterized in that, The inner peripheral wall of the first unit rod is provided with a first stop ring, a first guide post and the locking area, and the first guide post extends along the axial direction of the first unit rod; the second unit rod includes a first guide arc protruding from one end of its outer peripheral wall, and the first guide arc moves synchronously with the locking block; The first guide arc is rotatable to abut against the first guide post to indicate that the locking block is fully rotated out of the locking area. The first guide arc slides with the first guide post to guide the extension and retraction direction of the second unit rod. The first stop ring is adapted to abut against the first guide arc to limit the extension distance of the second unit rod.

7. A door handle safety lock according to claim 6, characterized in that, The locking block is disposed on the first guide arc, and the two ends of the first guide arc have a first active guide surface. One side of the first guide post is adapted to form a first passive guide surface. The inner peripheral wall of the first unit rod is also provided with another first passive guide surface. The two first passive guide surfaces slide in cooperation with the two first active guide surfaces to guide the extension and retraction direction of the second unit rod and limit circumferential displacement.

8. A door handle safety lock according to claim 7, characterized in that, The first stop ring is disposed at one axial end of the first unit rod, and the first stop ring forms another locking area. The locking block can be inserted into the locking area in the first stop ring along the axial direction of the second unit rod.

9. A door handle safety lock according to claim 8, characterized in that, The inner peripheral wall of the second unit rod is provided with a second stop ring and two second guide posts. One end of the second guide post is connected to the second stop ring, and the other end of the second guide post forms the locking area. The second guide post extends along the axial direction of the second unit rod, and a second sliding area is defined between the two second guide posts. The outer peripheral wall of the third unit rod is provided with two centrally symmetrical second guide arcs, and the locking block is formed at one end of the second guide arc; When the second guide arc drives the locking block to completely exit the locking area, the second guide arc aligns with the second sliding area, and the spring is adapted to drive the second guide arc to slide within the second sliding area to guide the extension and retraction direction of the third unit rod; the second stop ring abuts against the second guide arc to limit the extension distance of the third unit rod.

10. A door handle safety lock according to claim 1, characterized in that, The adsorption unit includes an elastic adsorption sheet and a driving device. The driving device includes a transmission assembly and an operating device. The adsorption sheet and the driving device are respectively disposed on the front and rear sides of the base. The transmission assembly includes a threaded post adapted to connect the adsorption sheet and a threaded sleeve adapted to connect the operating device. The threaded post and the threaded sleeve are threadedly engaged to achieve axial movement. The operating device can drive the adsorption sheet to deform through the transmission assembly to form a negative pressure space. The base can rotate around the axis of the threaded post. The safety lock includes a working state and a non-working state. In the working state, the base is set perpendicular to the door handle, and the telescopic stop bar can extend to the rotation path of the door handle when it is extended. In the non-working state, the base can be rotated to be set parallel to the door handle, and the telescopic stop bar is away from the door handle.

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