Locking-bar type handle lock
The bicycle lock design addresses the challenges of operating in confined or dark environments by using a key-operated mechanism to separate the handle clamp and handle post, allowing for easy locking and unlocking and reducing the space needed for parking.
Patent Information
- Application Number
- JP2023208205
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-12-11
- Publication Date
- 2025-06-23
AI Technical Summary
Existing bicycle locks are difficult to operate in narrow or dark spaces, often requiring arm insertion and making it hard to find the keyhole, and they can cause handlebars to get stuck in crowded bicycle parking lots.
A bicycle lock design where the handle clamp and handle post are separated with female and male fittings, respectively, and equipped with grooves for bolts and a key-operated mechanism that allows the handle clamp to separate from the handle post for locking, reducing the space required for parking.
Facilitates easy locking and unlocking in tight spaces, prevents key loss, and reduces the width required for parking by allowing the handlebar to rotate independently, thus enhancing usability and space efficiency.
Smart Images

Figure 2025092838000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a bicycle lock, which facilitates locking and unlocking even in a narrow or dark place, prevents forgetting the key, and makes it easy to lock the bicycle even in a narrow place.
Background Art
[0002] Conventionally, a general bicycle is configured such that a handlebar is fixed to a handle clamp portion attached to a handle post, and the bicycle can be steered around a handle tube as an axis.
[0003] Also, in most cases, the installation position of many locks is around under the saddle.
Prior Art Documents
Patent Documents
[0004]
Patent Document 1
Patent Document 1
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0005] Therefore, when locking the bicycle in a narrow place, the lock is located around under the saddle, and one has to insert an arm to open and close it. Also, in a dark place, one cannot find the position of the keyhole and has to search blindly.
[0006] Also, in bicycle locking, the handlebar takes up the most width. When trying to lock the bicycle in a two-tiered bicycle parking lot such as a station, the handlebars get stuck together, causing difficulties.
Means for Solving the Problems
[0007] In order to solve the above problems, the clamp part that fixes the handlebar attached to the conventional handle post is separated, and the handle clamp side is made female and the handle post side is made male so that they can be fitted together. Grooves into which bolts can be inserted are provided on both inner sides, and bolts are inserted into them. A key is inserted through the keyhole at the top of the handle clamp, and the bolts are moved up and down by inserting and removing the key to connect and separate the handle post part and the handle clamp part.
Advantages of the Invention
[0008] Since the insertion and removal of the key is at the top of the handle clamp part, it can be easily done even in a narrow or dark place, thus eliminating the possibility of forgetting to lock.
[0009] The bolt-type handle lock is such that when the key is inserted (unlocked), the handle post and the handle clamp are joined, and when the key is removed (locked), they are separated, so that steering becomes impossible and only the handlebar can rotate, greatly reducing the space when parking the vehicle.
[0010] The structure is simple, and since there is a key and a key cover, it is safe as it will not fall out during driving.
Brief Explanation of the Drawings
[0011]
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Embodiments for Carrying Out the Invention
[0012] Next, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 and 2 are perspective views during use, FIG. 3 is a component deployment view, FIGS. 4, 5, and 6 are cross-sectional views. The handle clamp (1) in FIG. 3 is drawn as two components for the sake of explanation, but in reality, it is one piece.
[0013] The method of fixing the handle post to the head tube and the method of fixing the handlebar to the handle clamp are the same as those in the prior art.
[0014] Separate the handle clamp part attached to the conventional handle post, and make the shape such that the handle clamp side can be fitted with the female handle clamp (1) and the handle post side can be fitted with the male handle post (2). Provide grooves for the latch to enter, an upper latch groove (13) and a lower latch groove (22) on their inner sides. After inserting the latch (3) into them, fit the handle clamp (1) onto the handle post (2), cover it with the connecting cover (6), and fix it with the bolt with a cap (24). Then, attach the key cover (14) to the handle clamp (1) with a rod (15). Finally, insert the handlebar (5) and fix it with a bolt (15).
[0015] When locking, open the key cover (14) upwards, pull up the key (4), pull out the latch from the lower latch groove (22) and stop at a certain position, then pull it back and rotate it slightly to the right and pull it upwards. At this time, the latch (3) rides on the latch shelf (12), and at the same time, the pressing rod (31) falls by its own weight, and the movement of the latch (3) in the front and back directions is fixed, and the handle clamp (1) is separated from the handle post (2) and cannot be steered. Furthermore, when the handlebar (5) is rotated 90 degrees to the left, the pressing rod (31) slides on the lifting stud (21) with an inclination, and when it passes over the lifting stud (21), it falls by its own weight and completely fixes the handlebar (5).
[0016] When unlocking, open the key cover (14) upwards, insert the key (4) into the keyhole (11), rotate it slightly to the left until it stops and then insert it further. The pressing bar (31) will be pushed in by the key (4) and rise. When the pressing bar (31) rises, the handle clamp (1) can be rotated. When rotated to the right until it stops, the upper latch groove (13) and the lower latch groove (22) will overlap. When the key (4) is inserted further, the latch (3) will fit into the lower latch groove (22) of the handle post (2), and the handle post (2) and the handle clamp (1) will be connected, enabling steering. Also, the insertion of the key (4) is restricted by closing the key cover (14), making it easy to operate and preventing the key (4) from falling out.
[0017] Rotate the handlebar (5) 90 degrees to the left. When the handlebar (5) is fixed, the claw (32) of the latch (3) will enter under the cap of the bolt with a cap (24) to prevent the bolt from being pulled out.
Explanation of Symbols
[0018] 1 Handle clamp 11 Keyhole 12 Latch shelf 13 Upper latch groove 14 Key cover 15 Rod 16 Bolt 2 Handle post 21 Stopper 22 Lower latch groove 23 Pull-up bar hole 24 Bolt with a cap 3 Latch 31 Pressing bar 32 Claw 4 Key 5 Handlebar 6 Connecting cover
Claims
1. A device that separates the clamp part for fixing the handlebar attached to the conventional handle post, makes the handle clamp side female and the handle post side male so that they can be fitted together, has grooves for a latch to enter on both inner sides, inserts the latch into them, inserts a key through the keyhole at the top of the handle clamp, and connects and separates the handle post part and the handle clamp part by moving the latch up and down by inserting and removing the key.
2. A device that has a pressing bar inside the latch, when the key is removed, the pressing bar falls by its own weight to fix the forward and backward movement of the latch, and when the handle clamp part (handlebar) is rotated 90 degrees to the left, the pressing bar slides on a stopper with an inclination to lift up, and when it passes the stopper, it falls by its own weight to fix the left and right rotation of the handle lamp part and prevent steering.
3. A device in which when the handlebar is rotated 90 degrees during locking, the claw of the latch enters under the cap of the bolt with an umbrella and the bolt cannot come out.
Citation Information
Patent Citations
Production of wiring board
JP1997061838A
Start page guidance device and start page guidance method
JP2004362207A
Bicycle handlebar
JP2009173221A