Electric locks and sashes
The electric lock system for sashes addresses the lack of electric control in sliding door technologies by using a solenoid and microswitch to automate locking and unlocking, ensuring secure and convenient operation without manual intervention.
Patent Information
- Application Number
- JP2025003862U
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-11-07
AI Technical Summary
Existing technologies lack an efficient and aesthetically pleasing means to electrically control the locking and unlocking of sliding sash doors, necessitating manual operation and risking oversight.
An electric lock system for sashes that includes a solenoid, deadbolt, and microswitch, allowing for electrically controlled locking and unlocking of shoji screens, with indicators for the locked/unlocked state, and optionally remote control.
Enables electrically controlled locking and unlocking of sliding sashes, eliminating the need for manual operation and ensuring secure closure without aesthetic compromise.
Smart Images
Figure 0003254278000001_ABST
Abstract
Description
[Technical Field]
[0001] This invention relates to an electric lock and a sash, and more particularly to a technique for electrically controlling the locking / unlocking of a sash. [Background technology]
[0002] There are many products that electrically control the locking / unlocking of front doors (see, for example, Non-Patent Document 1 below), but when it comes to locking / unlocking sliding sash doors, crescent locks and other locks that require manual opening and closing are still the norm. For this reason, when going out, one had to go up to the window and check individually to make sure it was locked, and if it was open, one had to lock it every time. Not only was this cumbersome, but there was also the risk that one would accidentally overlook it and go out without locking it.
[0003] Incidentally, Patent Document 1 below discloses an electric lock for sashes that has a built-in electric motor, but this is based on the existence of a conventional crescent lock and is intended to complement it (to improve security performance), and the electric lock alone does not lock / unlock the sash. This naturally resulted in a more complex mechanism, and the deterioration of design due to the appearance that seemed like an afterthought was also an issue that could not be overlooked.
[0004] [Non-Patent Document 1] MIWA ASR Miwa Lock Electric Lock, Electric Strike, Locks When Energized / Internet URL: https: / / shop.1169.co.jp / view / item / 000000000023?category_page_id=ct5 / Search date: October 16, 2025 [Patent Document 1] Patent Publication No. 2008-075380 Summary of the Invention [Problem to be solved by the invention]
[0005] This invention was devised in view of the current situation, and aims to provide an electric lock that can electrically control the locking / unlocking of a sash. [Means for solving the problem]
[0006] In order to achieve the above object, the electric lock described in claim 1 is an electric lock that locks and unlocks a shoji screen that is slidably incorporated into the sash, and is equipped with a main body that is attached to the top surface of the upper frame of the sash, an opening formed on the underside of the main body, and a solenoid and deadbolt placed within the main body, the plunger of the solenoid is connected to the upper rear end of the deadbolt, and the lower rear end of the deadbolt is rotatably supported on the inner surface of the main body via a rotating shaft, and when the power supply to the solenoid is cut off, the tip of the deadbolt protrudes downward from the opening and engages with the upper part of the shoji screen in the closed state, thereby locking the shoji screen, and when the power is supplied to the solenoid, the plunger is attracted and the tip of the deadbolt is retracted into the main body through the opening, thereby unlocking the shoji screen.
[0007] The electric lock described in claim 2 is the electric lock of claim 1, characterized in that it is equipped with a switch that switches between supplying and cutting off power to the solenoid, a sensor that detects whether the deadbolt is in a locked state protruding from the main body or in an unlocked state retracted within the main body, and an indicator that shows the locked / unlocked state to the outside.
[0008] The electric lock described in claim 3 is the electric lock of claim 2, characterized in that the sensor is a microswitch arranged in the main body, and this microswitch detects the operating position of the plunger (protruding position / sucking position).
[0009] The electric lock described in claim 4 is the electric lock of claims 1 to 3, characterized in that the underside of the deadbolt protruding from the opening forms an inclined surface, and when the power supply to the solenoid is cut off with the shoji screen open, the top of the shoji screen, which is slid in the closing direction, pushes the deadbolt up into the main body along the inclined surface, thereby ensuring the movement of the shoji screen, and when the shoji screen is fully closed, the deadbolt protrudes downward and engages with the top of the shoji screen.
[0010] The sash described in claim 5 is a sash in which an outer shoji screen and an inner shoji screen are slidably incorporated within a window frame, and is characterized in that a pair of electric locks described in any of claims 1 to 3 are placed on the top surface of the rail groove on the inner shoji screen side within the upper frame of the sash, and the outer shoji screen is locked by the deadbolt of one electric lock engaging with the top of the interior door handle of the outer shoji screen when it is closed, and the inner shoji screen is locked by the deadbolt of the other electric lock engaging with the top of the rear end face of the inner shoji screen when it is closed. The above-mentioned "window frame" broadly includes not only "four-sided frames" and "single-sliding three-sided frames," but also "window frames consisting only of upper and lower frames with a central draw" that omit the vertical frames on the left and right. [Effects of the Invention]
[0011] By using the electric lock of this invention, it is possible to electrically control the locking and unlocking of the sash that slides open and closed like a shoji screen. This eliminates the need to approach the window each time to lock it and manually operate the key, as was the case in the past. [Brief explanation of the drawings]
[0012] [Figure 1] FIG. 2 is a perspective view showing the appearance of the underside of the electric lock. [Figure 2] FIG. 2 is a schematic diagram showing the internal structure of an electric lock. [Figure 3] FIG. 2 is a schematic diagram showing a state in which a first electric lock and a second electric lock are attached within an upper frame of a sash. [Figure 4]1 is a schematic diagram of a first electric lock and a second electric lock attached to the upper frame of a sash, viewed from below. FIG. [Figure 5] This is a schematic diagram of the first electric lock and outer screen viewed from the front. [Figure 6] This is a schematic diagram showing how the movement of the outer sash is restricted by the interior door handle of the outer sash engaging with the deadbolt protruding from the first electric lock, and how the restriction on the movement of the outer sash is released by storing the deadbolt inside. [Figure 7] This is a schematic diagram showing the outer screen in an open state. [Figure 8] This is a schematic diagram showing the operation when closing the outer screen after the first electric lock is locked. [Figure 9] This is a schematic diagram showing how the movement of the inner sash is restricted by the rear end face of the inner sash abutting against the deadbolt protruding from the second electric lock, and how the restriction on the movement of the inner sash is released by storing the deadbolt inside. [Figure 10] This is a schematic diagram showing the inner shoji screen in an open state. [Figure 11] This is a schematic diagram showing the operation when closing the inner shoji screen after the second electric lock is locked. BEST MODE FOR CARRYING OUT THE INVENTION
[0013] The electric lock according to the present invention will be described below with reference to the accompanying drawings, but the present invention is not limited to the embodiments. Figure 1 is an oblique view of an electric lock 10 viewed from below, and includes a rectangular main body 12, a rectangular opening 14 provided on the underside 12a of the main body 12, and a deadbolt 16 protruding obliquely from the opening 14. A rubber buffer plate 18 is adhered to the tip surface 16a of the deadbolt 16.
[0014] Figure 2 is a schematic diagram showing the internal structure of the electric lock 10. A solenoid 20 is arranged within the main body 12, and the tip of its plunger (movable iron core) 22 is engaged with a connecting member 26 via a pin 24. The connecting member 26 is pivotally engaged with the upper rear end of the deadbolt 16 via a pin 28 . The lower rear end of the deadbolt 16 is rotatably engaged with the inner wall of the main body 12 via a rotating shaft 30 . A microswitch 32 is disposed on the rear end side of the solenoid 20.
[0015] Since the solenoid 20 is a pull type, when power is cut off, it is pulled to the left by the weight of the deadbolt 16, and the plunger 22 protrudes from the main body of the solenoid 20, as shown in FIG. 2(a). As a result, the lower surface 16 b of the deadbolt 16 and the buffer plate 18 protrude outward from the opening 14 of the main body 12 . At this time, the tip piece 34a of the extension arm 34 connected to the connecting member 26 presses the movable lever 32a of the microswitch 32 to the left, turning the switch ON.
[0016] On the other hand, when the solenoid 20 is energized, the plunger 22 is drawn into the main body by the electromagnetic force generated by the coil of the solenoid 20, as shown in FIG. 2(b). As a result, the upper rear end of the deadbolt 16 is pulled toward the solenoid 20 via the connecting member 26, and the entire deadbolt 16 is housed within the main body 12. At this point, the tip 34a of the extension arm 34 separates from the movable lever 32a of the microswitch 32, so that the switch is turned off.
[0017] FIG. 3 shows a state in which a first electric lock 10A and a second electric lock 10B are installed within an upper frame 42 of a frame 41 on all four sides of a sash 40 fitted into an opening in a building (such as an entrance to a balcony). An outer shoji screen 46 and an inner shoji screen 48 are attached to the sash 40. The outer shoji screen 46 and the inner shoji screen 48 are provided with rectangular glass plates (double glass) 46a, 48a, respectively. The first electric lock 10A and the second electric lock 10B are both attached to the inside of the upper frame 42 and cannot be seen from inside the room, so they do not impair the appearance. In the figure, symbol 46b indicates the interior door end handle of the outer shoji screen 46, and symbol 48b indicates the interior door end handle of the inner shoji screen 48. Also, the symbol 48c indicates the joining portion of the inner shoji screen 48.
[0018] The outer shoji screen 46 and the inner shoji screen 48 each constitute a so-called large-opening sash with a height of 3 m or more and a width of 2 m or more, and their lower ends are supported by multiple door rollers embedded in the lower frame of the four-sided frame 41, and their upper ends are inserted into rail grooves in the upper frame 42. As a result, the outer shoji screen 46 and the inner shoji screen 48 can slide left and right. However, the electric lock 10 according to this invention can of course also be applied to sashes of general size.
[0019] The first electric lock 10A and the second electric lock 10B are connected to a control panel 52 via an electric wire 50. In addition, a first operation switch 54A and a second operation switch 54B are connected to the control panel 52 via an electric wire 50. The first operating switch 54A and the second operating switch 54B serve to switch between supplying and cutting off power to the solenoids 20 built into the first electric lock 10A and the second electric lock 10B, respectively.
[0020] The first operation switch 54A and the second operation switch 54B are made of a transparent or semi-transparent material, and the word "closed" is engraved on the surface thereof. Furthermore, light-emitting elements such as LEDs are arranged inside the first operating switch 54A and the second operating switch 54B, and when the electric locks 10A, 10B are locked, the light-emitting elements are turned on in response to an output (ON) from the microswitch 32, making the word "closed" stand out. This allows you to see at a glance whether the first electric lock 10A or the second electric lock 10B is locked. In contrast, when the first electric lock 10A or the second electric lock 10B is unlocked, the light-emitting element is turned off in response to the output (OFF) from the microswitch 32, making the word "closed" less noticeable and indicating that the electric locks 10A and 10B are not locked.
[0021] The output (ON / OFF) of the microswitch 32 is input to a control panel 52 from the first electric lock 10A and the second electric lock 10B via an electric wire 50. When the output of the microswitch 32 is "ON" (locked), power is supplied to the light emitting elements of the first operation switch 54A and the second operation switch 54B, causing them to light up. On the other hand, when the output of the microswitch 32 is "OFF" (unlocked), the power supply to the light emitting elements of the first operation switch 54A and the second operation switch 54B is stopped, turning them off.
[0022] FIG. 4 is a schematic diagram of the inside of the top frame 42 of the sash 40 as viewed from below. As shown in the figure, the first electric lock 10A and the second electric lock 10B are each fixed via bolts or the like to the top surface 56 of the upper frame located above the slide rail groove on the inner shoji screen 48 side. Here, "slide rail groove on the inner shoji screen 48 side" means the rail groove used when opening the inner shoji screen 48.
[0023] As shown in the figure, the deadbolt 16 protruding from the first electric lock 10A is positioned so that it abuts the interior door handle 46b of the outer shoji screen 46 when closed, and the deadbolt 16 protruding from the second electric lock 10B is positioned so that it abuts the rear end face 48d of the inner shoji screen 48 when closed. The symbol 46c in the figure indicates the joint part of the outer shoji screen 46.
[0024] Figure 5 is a schematic diagram of the first electric lock 10A and the outer shoji screen 46 viewed from the front, showing the deadbolt 16 protruding downward from the main body 12 engaging with the interior door handle 46b of the outer shoji screen.
[0025] Normally, power supply from the control panel 52 to the first electric lock 10A is stopped, so that the deadbolt 16 of the first electric lock 10A protrudes downward from the main body 12, as shown in FIG. 6(a). This causes the inside door handle 46b of the outer shoji screen 46 to engage with the deadbolt 16, restricting the opening of the outer shoji screen 46. In response to this, when the first operating switch 54A is pressed to turn it ON and power supply from the control panel 52 to the first electric lock 10A begins, the deadbolt 16 of the first electric lock 10A is stored within the main body 12, as shown in Figure 6(b), and the engagement with the interior door handle 46b of the outer shoji screen 46 is released.
[0026] As a result, as shown in Figure 7, the outer screen 46 can be slid to the right, forming an opening 58 on the left side. At this time, the light-emitting element of the first operating switch 54A goes out, indicating that the outer screen 46 is unlocked.
[0027] To relock the outer screen 46, the user manually closes the outer screen 46 and then presses the first operating switch 54A to turn it OFF, thereby stopping the power supply to the first electric lock 10A. As a result, the deadbolt 16 of the first electric lock 10A protrudes downward from the main body 12 and engages with the interior door handle 46b of the exterior sliding screen 46 (see FIG. 6(a)).
[0028] Furthermore, even if the first operating switch 54A is turned OFF before the outer screen 46 is completely closed, and the deadbolt 16 of the first electric lock 10A is protruded while leaving the open section 58 as shown in Fig. 8(a), as shown in Fig. 8(b), the inside door handle 46b of the outer screen 46 abuts against the lower surface 16b of the inclined deadbolt 16, causing the deadbolt 16 to be stored a required amount within the main body 12. This ensures that the outer screen 46 can move in the closing direction. When the outer shoji screen 46 is completely closed, as shown in Figure 8(c), the deadbolt 16 protruding downward from the main body 12 of the first electric lock 10A engages with the interior door handle 46b, thereby locking the outer shoji screen 46.
[0029] Similarly, on the inner shoji screen 48 side, power supply from the control panel 52 to the second electric lock 10B is normally stopped, so the deadbolt 16 protrudes downward from the main body 12, as shown in Figure 9(a). This causes the deadbolt 16 to abut against the rear end surface 48d of the inner shroud 48, restricting the opening of the inner shroud 48. In contrast, when the second operating switch 54B is pressed to turn it ON and power supply from the control panel 52 to the second electric lock 10B begins, the deadbolt 16 is stored within the main body 12, as shown in Figure 9(b), and the engagement with the rear end face 48d of the inner shoji screen 48 is released.
[0030] As a result, as shown in FIG. 10, the inner screen 48 can be slid to the left, forming an opening 58 on the right side. At this time, the light emitting element of the second operating switch 54B goes out, indicating that the inner sliding door 48 is unlocked.
[0031] To lock the inner screen 48 again, the inner screen 48 is manually closed and then the second operating switch 54B is pressed to turn it OFF, thereby stopping the power supply to the second electric lock 10B. As a result, the deadbolt 16 of the second electric lock 10B protrudes downward from the main body 12 and engages with the rear end surface 48d of the inner screen 48 (see FIG. 9(a)).
[0032] As shown in Figure 11(a), even if the second operating switch 54B is turned OFF before the inner shoji screen 48 is completely closed and the inner shoji screen 48 is closed with the deadbolt 16 protruding, there is no problem because the upper end surface 48e of the inner shoji screen 48 remains in contact with the lower surface 16b of the inclined deadbolt 16, allowing the inner shoji screen 48 to slide, as shown in Figure 11(b). When the inner door 48 is completely closed, the deadbolt 16 abuts against the rear end surface 48d of the inner door 48, as shown in FIG. 11(c), and the inner door 48 is locked.
[0033] Although not shown in the figure, it is of course also possible to open both the outer sash 46 and the inner sash 48 simultaneously by turning both the first operating switch 54A and the second operating switch 54B OFF (unlocked).
[0034] As described above, since the first electric lock 10A and the second electric lock 10B are both fixed above the rail groove on the inner shoji screen 48 side, the respective deadbolts 16 are prevented from being operated from the outside.
[0035] In the above, an example was shown in which the first operation switch 54A and the second operation switch 54B are also used as indicators for indicating the locked / unlocked state, but the operation switches and indicators may also be prepared separately. It is also possible to use a display (such as a liquid crystal display) that actively displays "unlocked" and "locked" respectively.
[0036] In addition, although the above example shows locking / unlocking being switched using a wired operation switch, it is also possible to remotely switch locking / unlocking and display the status wirelessly using a remote control switch.
[0037] Furthermore, although the above example shows the locking / unlocking state of the electric lock 10 being detected using the microswitch 32, it is of course also possible to use other sensors. [Explanation of symbols]
[0038] 10 Electric Lock 10A First Electric Lock 10B Second Electric Lock 12 Main body 14 Openings 16 Deadbolt 18 Buffer plate 20 Solenoid 22 Plunger 24-pin 26 Connecting member 28-pin 30 Rotation axis 32 Microswitch 34 Extension Arm 40 Sash 41 Four-sided frame 42 Upper frame 46 Outer Shoji Screen 46b Indoor door handle 48 Inner Shoji Screen 48d Rear end of inner shoji screen 50 Electric wire 52 Control Panel 54A First operating switch 54B Second operating switch 56 Top surface of upper frame 58 Open area
Claims
1. An electric lock that locks and unlocks a sliding door that is slidably mounted on a sash. a main body attached to the top surface of the upper frame of the sash; an opening formed on the underside of the main body; a solenoid and a deadbolt disposed within the body; The solenoid plunger is connected to the upper rear end of the deadbolt. The lower rear end of the deadbolt is rotatably supported on the inner surface of the main body via a rotating shaft, When the power supply to the solenoid is cut off, the tip of the deadbolt protrudes downward from the opening and engages with the top of the closed shoji screen, locking the screen. This electric lock is characterized in that when power is supplied to the solenoid, the plunger is attracted, causing the tip of the deadbolt to retract into the main body through the opening, unlocking the shoji screen.
2. a switch for switching between supplying and cutting off power to the solenoid; a sensor that detects whether the deadbolt is in a locked state where it protrudes from the main body or in an unlocked state where it is retracted within the main body; 2. The electric lock according to claim 1, further comprising an indicator that indicates the locked / unlocked state to the outside.
3. the sensor is a microswitch disposed within the main body; 3. The electric lock according to claim 2, wherein the microswitch detects the operating position of the plunger.
4. The underside of the deadbolt protruding from the opening forms a sloped surface, When the power supply to the solenoid is cut off while the door is open, the top of the door slides closed, pushing the deadbolt up into the main body along the inclined surface, ensuring the door can move.
4. An electric lock according to claim 1, wherein the deadbolt projects downward and engages with the upper part of the shoji screen when the shoji screen is fully closed.
5. A sash in which an outer shoji screen and an inner shoji screen are slidably incorporated into a window frame, A pair of electric locks according to any one of claims 1 to 3 are disposed on the top surface of the rail groove on the inner shoji side within the upper frame of the sash, This sash is characterized in that the deadbolt of one electric lock engages with the upper part of the interior door handle of the outer sash when it is closed, thereby locking the outer sash, and the deadbolt of the other electric lock engages with the upper part of the rear end face of the inner sash when it is closed, thereby locking the inner sash.