Manual alarm detector

Abstract

The utility model discloses a manual alarm detector, which comprises a rear seat, a front shell and an operating handle, the lower end of the operation handle is provided with a hinge part and an elastic piece, the periphery of the hinge part is provided with an arc-shaped convex face and a receding notch, and the rear seat is provided with an elastic touch pressing piece. A cavity with a front opening is formed in the front surface of the front shell, a handle plate is arranged at the upper end of the operating handle and covers the lower portion of the opening in a normal state, and the operating handle is opened outwards. The front shell is also provided with a pressing cover plate, the pressing cover plate covers the upper part of the opening in a normal state, and the opening direction of the pressing cover plate is inward; an elastic blocking piece protrudes from the lower edge of the inner side of the pressing cover plate. According to the utility model, the structural design of the manual alarm detector is optimized, the opening of the concave cavity can be covered through the cooperation of the handle plate on the operating handle and the pressing cover plate, and the structural design not only gives consideration to functionality and aesthetic property, but also improves the practicability and reliability of the manual alarm detector.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fire-fighting equipment, and particularly relates to a manual fire alarm detector. BACKGROUND

[0002] The manual fire alarm detector (referred to as a manual detector) is a device widely used in a fire alarm system, and is mainly used for triggering a fire alarm through manual operation in an emergency. The existing manual detector is usually provided with an operating handle on a front shell, and a user triggers an alarm function by pulling the operating handle. In order to facilitate the user to quickly grasp the operating handle, a concave cavity corresponding to the operating handle is usually designed on the front shell, so that the hand can quickly extend into the concave cavity for operation. However, the opening of the concave cavity in the existing manual detector is directly open. Although this design improves the convenience of operation, it also brings the following problems: first, the exposure of the concave cavity affects the overall appearance of the product; second, the concave cavity is prone to accumulate dust, foreign matter and other pollutants, which increases the difficulty of equipment cleaning and maintenance, not only reduces the use experience, but also may affect the long-term reliability of the equipment. SUMMARY

[0003] To this end, the utility model aims at providing a kind of manual detector, the opening of concave cavity can be covered by the cooperation of handle plate and pressing cover plate on operating handle, the structure design not only gives consideration to functionality and appearance, also improves the practicality and reliability of manual detector.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] The utility model provides a kind of manual detector, including back seat, the front shell of fixed in the front part of back seat and the operating handle of lower end and front shell articulates;The lower end of operating handle is equipped with articulation and provides the elastic member of closed elastic force for operating handle, the outer periphery of articulation is equipped with arc convex surface and let place gap, the elastic touch pressure piece is equipped with in the corresponding position of back seat with articulation, the elastic touch pressure piece and arc convex surface resist when operating handle in closed state, let place gap and the elastic touch pressure piece cooperate when in open state;The front surface of front shell is set to the concave cavity of front opening, the upper end of operating handle is set to handle plate, the handle plate covers the lower part of opening in normal state, the opening direction of operating handle is outward;Front shell is further equipped with pressing cover plate, and the pressing cover plate covers the upper part of opening in normal state, and the opening direction of pressing cover plate is inward;The lower edge of the inboard of pressing cover plate is projected and is equipped with elastic baffle.

[0006] Preferably, a support is fixed in the concave cavity, the pressing cover plate is hinged on the support through a hinge shaft, and a torsional spring is sleeved on the hinge shaft to provide an outward elastic force for the pressing cover plate.

[0007] Preferably, the bracket has two oppositely arranged side plates, each side plate has a hinge shaft on one side and a mounting shaft on the other side, the hinge shaft and the mounting shaft are coaxial, and the torsion spring is mounted on the mounting shaft; the pressing cover plate has a protruding connecting plate at a position corresponding to each side plate, the connecting plate has a hinge hole that mates with the hinge shaft, and the inner side of the pressing cover plate and the bracket are respectively provided with a locking groove one and a locking groove two that engage with the two ends of the torsion spring.

[0008] Preferably, the bottom of the bracket is provided with a support surface, which is in contact with the bottom wall of the cavity. A positioning post and a fixing hole are provided on the support surface. The bottom surface of the cavity is provided with a positioning hole that is inserted and engaged with the positioning post and a screw through hole that is aligned with the fixing hole. The fixing screw passes through the screw through hole and is screwed into the fixing hole.

[0009] Preferably, the elastic pressing element includes a hollow tube base, a button that can move back and forth within the tube base, and a return spring within the tube base. The return spring provides a forward return force to the button. A retaining ring protrudes from the inner wall of the tube base, and a buckle is provided at the lower end of the button to engage with the retaining ring. The rear seat is provided with mounting holes for mounting the tube base.

[0010] Preferably, the rear seat is provided with screw holes, the outer wall of the tube seat is provided with a fixing plate, the fixing plate is provided with screw through holes two, and the fastening screw passes through screw through holes two and is fixedly connected to the screw holes.

[0011] Preferably, the elastic baffle is a rubber sheet, which is glued and fixed to the pressing cover plate.

[0012] The positive effects of this utility model are as follows: By optimizing the structure of the manual alarm detector, specifically by setting a press cover and an operating handle on the front shell, this effectively solves the problem of direct exposure of the cavity in the prior art, significantly improving the overall aesthetics of the product. Under normal conditions, the press cover covers the upper part of the cavity, and the handle plate of the operating handle covers the lower part of the cavity, giving the front side of the front shell a flat and simple appearance, avoiding obvious recesses in the cavity. In addition, this design reduces the possibility of dust and foreign objects entering the cavity, reduces the difficulty of cleaning and maintenance, and improves the user experience and long-term reliability. Furthermore, the opening directions of the operating handle and the press cover are designed to be outward and inward, respectively (i.e., the press cover is directly pushed inward by hand to reach into the cavity, thereby quickly grasping the handle plate and turning the operating handle outward, to adapt to emergency operation during fire alarms), which not only ensures operational convenience and rapid response capability, but also optimizes the structural layout and improves the practicality and aesthetics of the product. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art are briefly introduced below. Similar elements or parts in the drawings are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale.

[0014] Figure 1 This is a perspective view of the manual alarm detector in this utility model;

[0015] Figure 2 This is a front view of the manual telegraph detector in this utility model;

[0016] Figure 3 For along Figure 2 A sectional view cut along line AA.

[0017] Figure 4 for Figure 3 A magnified view of a portion of point B in the middle;

[0018] Figure 5 This is a structural diagram of the bracket, pressing cover plate, and fixing screws in the combined state of this utility model;

[0019] Figure 6 This is a structural diagram of the bracket, pressing cover plate, and fixing screws in the disassembled state of this utility model;

[0020] Figure 7 This is a schematic diagram of the structure of the tube seat of this utility model.

[0021] The attached figures are labeled as follows: 1. Rear seat; 11. Mounting hole; 2. Front shell; 21. Cavity; 3. Operating handle; 31. Hinge; 32. Arc-shaped convex surface; 33. Relief notch; 4. Elastic contact element; 41. Tube seat; 42. Button; 43. Return spring; 44. Snap ring; 45. Buckle; 46. Fixing plate; 47. Screw hole two; 5. Press cover plate; 51. Connecting plate; 52. Hinge hole; 53. Slot one; 6. Bracket; 61. Hinge shaft; 62. Torsion spring; 63. Side plate; 64. Mounting shaft; 65. Slot two; 66. Support surface; 67. Positioning post; 68. Fixing hole; 7. Circuit board; 71. Electric switch; 8. Elastic baffle. Detailed Implementation

[0022] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0023] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0024] The structure of the manual newsletter detector in this embodiment of the utility model is as follows: Figures 1 to 7 As shown, it includes a rear seat 1, a front shell 2 fixed to the front of the rear seat 1, and an operating handle 3 hinged to the front shell 2 at its lower end. The lower end of the operating handle 3 is provided with a hinge portion 31 and an elastic element (preferably a torsion spring, not shown in the figure) that provides closing elastic force to the operating handle 3. The outer periphery of the hinge portion 31 is provided with an arc-shaped convex surface 32 and a clearance notch 33. An elastic pressing element 4 is provided on the rear seat 1 at a position corresponding to the hinge portion 31. When the operating handle 3 is in the closed state, the elastic pressing element 4 abuts against the arc-shaped convex surface 32. When the operating handle 3 is in the open state, the elastic pressing element 4 provides closing elastic force to the front shell 2. The notch 33 engages with the elastic pressing member 4; a circuit board 7 is provided on the rear side of the rear seat 1, and an electric switch 71 is mounted on the circuit board 7. The electric switch 71 is preferably a release switch. When the operating handle 3 is in the closed state, the elastic pressing member 4 presses the electric switch 71. When the operating handle 3 is in the open state, the elastic pressing member 4 releases the pressure on the electric switch 71, thereby controlling the fire alarm system to issue an alarm signal; when the operating handle 3 is returned to the closed state, the front shell 2 and the rear seat 1 need to be opened to release the engagement between the notch 33 and the elastic pressing member 4.

[0025] Furthermore, the front surface of the front housing 2 is provided with a recessed cavity 21 with a front opening, and the upper end of the operating handle 3 is provided with a handle plate 34. In normal operation, the handle plate 34 covers the lower part of the opening, and the opening direction of the operating handle 3 is outward. The front housing 2 is also provided with a pressing cover plate 5. In normal operation, the pressing cover plate 5 covers the upper part of the opening, and the opening direction of the pressing cover plate 5 is inward. Furthermore, an elastic baffle 8 is provided protruding from the lower inner edge of the pressing cover plate 5. In normal operation, the elastic baffle 8 can cover the gap between the pressing cover plate 5 and the handle plate 34. The elastic baffle 8 is preferably made of rubber, which is fixed to the pressing cover plate 5 by adhesive bonding. This manual alarm detector effectively solves the problem of direct exposure of the recessed cavity 21 in the prior art by providing a pressing cover plate 5 and an operating handle 3 on the front housing 2, and significantly improves the overall aesthetics of the product. Under normal conditions, the pressing cover 5 covers the upper part of the recess 21, and the handle plate 34 of the operating handle 3 covers the lower part of the recess 21, giving the front side of the front shell 2 a flat and simple appearance, avoiding obvious recesses in the recess 21. At the same time, this design reduces the possibility of dust and foreign objects entering the recess 21, lowers the difficulty of equipment cleaning and maintenance, and improves user experience and long-term reliability. Furthermore, the opening directions of the operating handle 3 and the pressing cover 5 are designed to be outward and inward, respectively (i.e., the pressing cover 5 is directly pushed inward by hand to reach into the recess 21, thereby quickly grasping the handle plate 34 and turning the operating handle 3 outward, adapting to emergency operation during fire alarms). This ensures both operational convenience and rapid response capability, while also optimizing the structural layout and enhancing the product's practicality and aesthetics.

[0026] Combination Figure 3 and Figure 5 and Figure 6 As shown, to accommodate the installation of the operating handle 3, a bracket 6 is fixed inside the cavity 21. The pressing cover 5 is hinged to the bracket 6 via a hinge shaft 61, and a torsion spring 62 is fitted on the hinge shaft 61. The torsion spring 62 provides outward elastic force to the pressing cover 5, so that the pressing cover 5 can automatically reset and remain closed when no external force is applied. This structure realizes the automatic closing function of the pressing cover 5, ensuring that the pressing cover 5 can stably cover the opening of the cavity 21 under normal conditions (even when the pressing cover 5 is in the closed state), preventing dust and foreign objects from entering the cavity 21, and reducing the difficulty of equipment cleaning and maintenance. When the pressing cover 5 is pressed by an external force, it flips inward and compresses the torsion spring 62, making the operation simple and the response rapid.

[0027] See Figure 5 and Figure 6The bracket 6 has two opposing side plates 63. Each side plate 63 has a hinge shaft 61 on one side and a mounting shaft 64 on the other side. The hinge shaft 61 and the mounting shaft 64 are coaxial. The torsion spring 62 is mounted on the mounting shaft 64. The pressing cover plate 5 has a protruding connecting plate 51 at a position corresponding to each side plate 63. The connecting plate 51 has a hinge hole 52 that mates with the hinge shaft 61. The inner side of the pressing cover plate 5 and the bracket 6 are respectively provided with a first slot 53 and a second slot 65 that engage with the two ends of the torsion spring 62. By adopting the coaxial design of the side plates 63, hinge shaft 61 and mounting shaft 64, the pressing cover plate 5 and the bracket 6 are efficiently connected, resulting in a compact, stable and reliable structure. A torsion spring 62 is mounted on the mounting shaft 64 and engages with the inner side of the pressing cover 5 and the bracket 6 via slot 1 53 and slot 2 65 respectively. This ensures the precise installation of the torsion spring 62 and the effective transmission of elastic force, allowing the pressing cover 5 to smoothly rotate and automatically reset under external force. Figure 3 As shown, the support surface 66 is provided at the bottom of the bracket 6, which is in contact with the inner bottom wall of the cavity 21. The support surface 66 is provided with a positioning post 67 and a fixing hole 68. The inner bottom surface of the cavity 21 is provided with a positioning hole that is inserted into the positioning post 67 and a screw through hole that is aligned with the fixing hole 68. The fixing screw passes through the screw through hole and is screwed into the fixing hole 68. By providing a support surface 66 at the bottom of the bracket 6, the bracket 6 can fit tightly against the inner bottom wall of the cavity 21. The precise positioning of the bracket 6 is achieved by the insertion and engagement of the positioning post 67 with the positioning hole. At the same time, the fixing hole 68 is aligned with the screw through hole on the inner bottom surface of the cavity 21, and the screwing of the fixing screw ensures a stable connection between the bracket 6 and the cavity 21.

[0028] Combination Figure 3 and Figure 7 As shown, the elastic pressing component 4 includes a hollow tube base 41, a button 42 movable back and forth within the tube base 41, and a return spring 43 within the tube base 41. The return spring 43 provides a forward return force to the button 42. A retaining ring 44 protrudes from the inner wall of the tube base 41, and a buckle 45 at the lower end of the button 42 engages with the retaining ring 44. The rear seat 1 has mounting holes 11 for mounting the tube base 41. The presence of the return spring 43 ensures that the button 42 can quickly return to its initial position, thereby improving the sensitivity of operation. The retaining ring 44 on the inner wall of the tube base 41 engages with the buckle 45 at the lower end of the button 42, effectively preventing the button 42 from detaching from the tube base 41 and enhancing the stability of the structure. The mounting holes 11 on the rear seat 1 simplify the installation process of the elastic pressing component 4 while ensuring that it is firmly fixed and accurately positioned.

[0029] See Figure 7The rear seat 1 is provided with screw holes, and the outer wall of the tube seat 41 is provided with a fixing plate 46. The fixing plate 46 is provided with a screw through hole 47. The fastening screw passes through the screw through hole 47 and is fixedly connected to the screw hole; thereby ensuring the reliable fixing of the elastic contact member 4.

[0030] For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, these obvious variations or modifications derived from the essential spirit of this invention still fall within the scope of protection of this invention.

Claims

1. A manual call detector, comprising a rear seat (1), a front shell (2) fixed to the front of the rear seat (1), and an operating handle (3) hinged to the front shell (2) at its lower end; the operating handle (3) has a hinge portion (31) and an elastic element that provides closing elastic force to the operating handle (3) at its lower end, the hinge portion (31) has an arc-shaped convex surface (32) and a clearance notch (33) on its outer periphery, the rear seat (1) has an elastic pressing element (4) at a position corresponding to the hinge portion (31), the elastic pressing element (4) abuts against the arc-shaped convex surface (32) when the operating handle (3) is closed, and the clearance notch (33) cooperates with the elastic pressing element (4) when the operating handle (3) is open; characterized in that: The front shell (2) has a recessed cavity (21) with a front opening on its front surface. The upper end of the operating handle (3) is provided with a handle plate (34). In normal operation, the handle plate (34) covers the lower part of the opening. The opening direction of the operating handle (3) is outward. The front shell (2) is also provided with a pressing cover plate (5). In normal operation, the pressing cover plate (5) covers the upper part of the opening. The opening direction of the pressing cover plate (5) is inward. An elastic baffle (8) is provided on the lower inner edge of the pressing cover plate (5).

2. The manual call detector according to claim 1, characterized in that: A bracket (6) is fixed inside the cavity (21). The pressing cover (5) is hinged to the bracket (6) via a hinge shaft (61). A torsion spring (62) is fitted on the hinge shaft (61). The torsion spring (62) provides outward elastic force to the pressing cover (5).

3. The manual call detector according to claim 2, characterized in that: The bracket (6) is provided with two oppositely arranged side plates (63). Each side plate (63) has a hinge shaft (61) on one side and an installation shaft (64) on the other side. The hinge shaft (61) and the installation shaft (64) are coaxial. The torsion spring (62) is mounted on the installation shaft (64). The pressing cover plate (5) is provided with a protruding connecting plate (51) at the corresponding position of each side plate (63). The connecting plate (51) is provided with a hinge hole (52) that cooperates with the hinge shaft (61). The inner side of the pressing cover plate (5) and the bracket (6) are respectively provided with a slot 1 (53) and a slot 2 (65) that engage with the two ends of the torsion spring (62).

4. The manual call detector according to claim 3, characterized in that: The bracket (6) has a support surface (66) at the bottom. The support surface (66) is in contact with the inner bottom wall of the cavity (21). A positioning post (67) and a fixing hole (68) are provided on the support surface (66). The inner bottom surface of the cavity (21) is provided with a positioning hole that is inserted and matched with the positioning post (67) and a screw through hole that is aligned with the fixing hole (68). The fixing screw passes through the screw through hole and is screwed into the fixing hole (68).

5. The manual call detector according to claim 1, characterized in that: The elastic pressing element (4) includes a hollow tube base (41), a button (42) that can move back and forth inside the tube base (41), and a return spring (43) inside the tube base (41). The return spring (43) provides a forward return force for the button (42). A retaining ring (44) is provided protruding on the inner wall of the tube base (41). A buckle (45) is provided at the lower end of the button (42) to engage with the retaining ring (44). The rear seat (1) is provided with a mounting hole (11) for mounting the tube base (41).

6. The manual call detector according to claim 5, characterized in that: The rear seat (1) is provided with screw holes, and the outer wall of the tube seat (41) is provided with a fixing plate (46). The fixing plate (46) is provided with a screw through hole (47), and the fastening screw passes through the screw through hole (47) and is fixedly connected to the screw hole.

7. The manual call detector according to claim 1, characterized in that: The elastic baffle (8) is a rubber sheet, which is glued and fixed to the pressing cover plate (5).

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