Smoke detector and wiring terminal thereof

Abstract

The wiring terminal comprises a terminal piece, a screw and a nut, the terminal piece is provided with a substrate and a bent piece which are connected in a right-angle mode, the substrate is provided with two U-shaped grooves with outward openings, the head of the screw abuts against and is clamped in the U-shaped grooves, and threads of the screw are connected with threads of the nut in a matched mode; the adjacent sides of the two U-shaped grooves of the substrate are arranged in a separated mode through an isolation part, the connecting parts on the other far sides vertically extend in the reverse direction of the bent piece, and the ends of the connecting parts form inserting structures. According to the smoke detector and the wiring terminal thereof, each group of terminals can be connected and press two incoming and outgoing power line ends with the same or different diameters, and the problems that the line ends are not easy to fall off and the contact surface is reliable are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fire-fighting fire alarm product field, especially smoke detector. BACKGROUND

[0002] The utility model discloses a fire-fighting fire alarm product field, and fire-fighting fire provides positive and negative loop lines, and a plurality of smoke detectors can be connected in series on each loop line in the way of hand in hand, the smoke detector base has two groups of terminal blocks, each group of terminals is pressed one way into line and one way out of line two power line heads, and the diameter of the two heads of one way into line and one way out of line is different in some cases, resulting in that the thicker one is pressed tightly, and the thinner one is not pressed tightly, resulting in unreliable contact at the connection, and the head is easy to fall off. UTILITARY MODEL CONTENTS

[0003] The utility model provides a smoke detector and wiring terminal thereof, each group of terminals can be connected and pressed tightly to two power line heads with the same diameter or different diameters, and the head is not easy to fall off and the contact surface is reliable.

[0004] In order to solve the above technical problems, the utility model provides a wiring terminal of smoke detector, which is characterized by comprising a terminal sheet, a screw and a nut, the terminal sheet has a base sheet and a bent sheet connected at a right angle, two U-shaped grooves with external openings are formed in the base sheet, the head of the screw abuts and is clamped in the U-shaped groove, the screw thread and the nut thread are connected in thread cooperation, the two U-shaped grooves of the base sheet are arranged by the isolation part on one side, and the other side away from the connecting part is connected to the reverse perpendicular extension of the bent sheet and the end part forms a plug-in structure.

[0005] Further optimization scheme, the terminal sheet also has at least two anti-falling barbs, and the barbs are arranged at an angle with the base sheet in a non-plane manner.

[0006] Further optimization scheme, the diameter of the U-shaped groove abutting the screw is consistent with the diameter of the rod of the screw

[0007] Further optimization scheme, the outer part of the nut is square, and the contact surface of the wire pressing part is provided with multiple concave-convex marks for preventing the wire from falling off.

[0008] Further optimization scheme, the terminal sheet is a metal terminal sheet.

[0009] Further optimization scheme, the terminal sheet is integrally formed, and the cross section of the unfolded terminal sheet is a rectangle.

[0010] The utility model discloses another technical scheme is in: a smoke detector, the wiring terminal with the base of smoke detector is connected, and its characterized in that is equipped with two nut grooves on the base, the nut is limited in nut groove, when the screw rotates and drives the nut moves up and down in nut groove, and loop pressure line is pressed between the nut and terminal piece respectively.

[0011] Further optimization scheme, the two nut grooves of plastic part are vertically provided with the plastic plate for separating.

[0012] Further optimization scheme, the spring piece on the base is in contact with the terminal piece bending piece and electrically connected.

[0013] Further optimization scheme, the base is provided with the insertion slot connected with the barb.

[0014] The technical effect of the utility model is that the wiring terminal of the utility model smoke detector, the wiring terminal with the base of smoke detector is connected. The base is equipped with two nut grooves, and the nut is limited in the nut groove. When the screw rotates and drives the nut moves up and down in the nut groove, the loop pressure line is pressed between the nut and the terminal piece respectively. Each group of terminals can be connected and pressed tightly two power line heads of the same diameter or different diameter, and the line head is not easy to fall off and the contact surface is reliable. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is one of the structure schematic view of the wiring terminal of the utility model smoke detector;

[0016] Figure 2 It is the structure schematic view of the wiring terminal of the utility model smoke detector No. 2;

[0017] Figure 3 It is the exploded schematic view of the wiring terminal of the utility model smoke detector;

[0018] Figure 4 It is the expansion diagram of the wiring terminal of the utility model smoke detector;

[0019] Figure 5 It is the schematic diagram of the wiring terminal of the utility model and the base connection of smoke detector in and out line;

[0020] Figure 6 It is Figure 5 The sectional view of B-B position in it;

[0021] Figure 7 It is Figure 5 The sectional view of C-C position in it;

[0022] Figure 8 It isFigure 5 Cross-sectional view at position DD in the middle. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.

[0027] like Figures 1-4 As shown, this utility model discloses a wiring terminal 1a for a smoke detector, which includes a terminal piece 1, a screw 2, and a nut 3. The terminal piece 1 has a base plate 11 and a bent piece 12 connected at right angles to each other in an L-shape. The base plate 11 has two U-shaped grooves 18 with outward openings. The head 21 of the screw 2 abuts and is engaged in the U-shaped groove 18. The thread of the screw 2 and the nut 3 are threadedly connected. The two adjacent sides of the two U-shaped grooves 18 of the base plate 11 are separated by an isolation part 14. The connecting parts 15 on the other side, which are far away from each other, extend vertically in the opposite direction of the bent piece 12 and form a plug-in structure 13 at the end. In this embodiment, the plug-in structure 13 is a hook for fixing to the base 4.

[0028] The terminal sheet 1 also has at least two anti-falling barbs 16 and 17 arranged at an angle to the base sheet 11, the barb 16 being arranged at an acute angle to the base sheet 11 and the barb 17 being arranged at a right angle to the base sheet 11. The insertion structure 13, the barbs 16 and 17 are used to fix the terminal sheet 1. The base is provided with an insertion slot for connecting and fixing the barb 17.

[0029] The diameter of the U-shaped slot 18 at the position abutting the screw 2 is consistent with the diameter of the shank of the screw 2. In this embodiment, the screw 2 is a head cross screw, which is convenient for adjusting the up and down movement of the rotating screw 2. The exterior of the nut 3 is square, and the contact surface of the crimping line is provided with multiple concave-convex marks 31 for preventing the crimping line from falling off.

[0030] As shown in Figure 4 , the terminal sheet 1 is integrally formed, and the unfolded cross section of the terminal sheet 1 is a rectangle, which is close to a standard rectangle, thereby avoiding material waste. The terminal sheet 1 is a metal terminal sheet 1, and the spring sheet on the base is also a metal spring sheet, which is in contact with and electrically connected to the bent sheet of the terminal sheet 1, and is used for conducting electricity.

[0031] As shown in Figures 5-8 , the base 4 of the smoke detector of the utility model is provided with a terminal 1a, which is connected to the base 4 of the smoke detector in cooperation. The loop crimping lines of the one-way incoming line and the one-way outgoing line are respectively crimped between the nut 3 and the terminal sheet 1. The base 4 is provided with a nut slot 5 of a plastic part. The loop crimping lines of the one-way incoming line and the one-way outgoing line are a group of terminal positions. Two nut slots 5 are arranged in the group of terminal positions. The nut 3 is limited in the nut slot 5. When the screw 2 rotates, the nut 3 rotates with the screw 2 and moves up and down in the nut slot 5 in a square shape, and will not fall off from the nut slot 5. The two nut slots 5 of the plastic part are provided with a plastic plate 51 for separation in the vertical direction. The height of the plastic plate 51 is just enough to support the isolation part 14 of the terminal sheet 1.

[0032] The above-described embodiments are only preferred embodiments for fully illustrating the utility model, and the protection scope of the utility model is not limited thereto. Equivalent substitutions or transformations made by technicians in the technical field on the basis of the utility model are within the protection scope of the utility model. The protection scope of the utility model is subject to the claims.

Claims

1. A terminal for a smoke detector, characterised in that, It includes terminal sheet, screw and nut, the terminal sheet has the base sheet and the bent sheet which are connected at right angle, the base sheet is provided with two U-shaped slots which are opened outward, the head of the screw is abutted and clamped in the U-shaped slot, the screw thread and the nut thread are connected in thread cooperation; the two U-shaped slots of the base sheet are separated by the isolation part on the adjacent side, and the other side away from the connecting part is perpendicularly extended to the opposite direction of the bent sheet and the end part forms the plug-in structure.

2. A wiring terminal for a smoke detector according to claim 1, characterised in that The terminal sheet is also provided with at least two anti-falling barbs which are arranged at angle with the base sheet in non-plane.

3. A wiring terminal for a smoke detector according to claim 1, wherein The diameter of the U-shaped slot abutting the screw is consistent with the diameter of the stem of the screw.

4. A wiring terminal for a smoke detector according to claim 1, wherein The outer part of the nut is square, and the contact surface of the line pressing part is provided with multiple concave-convex marks for preventing the line from falling off.

5. A wiring terminal for a smoke detector according to claim 1, wherein The terminal sheet is metal terminal sheet.

6. A wiring terminal for a smoke detector according to claim 5, characterised in that The terminal sheet is integrally formed, and the cross section of the unfolded terminal sheet is rectangle.

7. A smoke detector comprising the terminal according to any one of claims 1 to 5, said terminal being connected to a base of said smoke detector, characterized in that, Two nut grooves are arranged on the base, the nut is limited in the nut groove, the nut moves up and down in the nut groove when the screw rotates, and the loop line is pressed between the nut and the terminal sheet.

8. Smoke detector according to claim 7, characterized in that The vertical plastic plate is arranged between the two nut grooves of the plastic part.

9. A smoke detector according to claim 7, characterised in that The elastic sheet on the base is in contact with and electrically connected to the bent sheet of the terminal sheet.

10. A smoke detector according to claim 7, characterised in that The plug-in groove connected with the barb is arranged on the base.

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