CN220627733U - Fuse protector - Google Patents

Abstract

The utility model discloses a fuse, which has the technical scheme that the fuse comprises a fuse tube, wherein contact blades are arranged at two ends of the fuse tube, a fuse piece is arranged between the two contact blades, and a fusing part with a notch is arranged on the fuse piece; a lamp holder is arranged on the outer side of the fusing tube, a mounting cavity and a control cavity are arranged in the lamp holder, a pair of contact pieces which are arranged at intervals are arranged in the mounting cavity, and a power supply and an indicator lamp are connected in series between the pair of contact pieces through wires; the contact piece extends into the control cavity to form a contact, a communication plate for communicating the two contacts and a pair of ejector rods corresponding to the fusing positions are slidably arranged in the control cavity, one end of each ejector rod is provided with a top plate propped against the communication plate, the other end of each ejector rod is matched with the fusing part in a clamping way, and a reset spring is arranged between each of the two top plates and the control cavity; through the arrangement of the indicator lamp, a worker can directly observe the state of the fuse piece in the fuse tube, so that whether the fuse piece is broken or not can be distinguished without disassembling the fuse tube; the maintenance can be more rapid.

Description

Fuse protector

Technical Field

The utility model relates to the technical field of power devices, in particular to a fuse.

Background

The fuse is an electric appliance which fuses the melt by the heat generated by the fuse when the current exceeds a specified value, and breaks the circuit by the heat generated by the fuse after the current exceeds the specified value for a period of time.

The existing fuse is generally composed of a fuse tube, a tube cap, a copper ring, a contact knife and a fuse piece, and because the fuse piece is positioned in the fuse tube which is integrally arranged, a worker cannot directly observe the state of the fuse piece when overhauling the fuse, and can determine whether the fuse piece in the fuse is melted and broken or not by disassembling the fuse or detecting the resistance of the fuse, so that the overhaul is troublesome; there is a need for a fuse that facilitates the observation of the melt state by personnel.

Disclosure of Invention

In order to solve the problems, the utility model provides the fuse, and the indicating lamp is used for facilitating direct observation of the state of the fuse by a worker, so that the workload of the worker during overhaul is reduced.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a fuse comprises a fuse tube, wherein contact blades are arranged at two ends of the fuse tube, a fuse piece is arranged between the two contact blades, and a fusing part with a notch is arranged on the fuse piece; a lamp holder is arranged on the outer side of the fusing tube, a mounting cavity and a control cavity are arranged in the lamp holder, a pair of contact pieces which are arranged at intervals are arranged in the mounting cavity, and a power supply and an indicator lamp are connected in series between the pair of contact pieces through wires; the contact extends to the control chamber to be formed with the contact, the control chamber slides and is provided with the intercommunication board of two contacts of intercommunication and a pair of ejector pin that corresponds with the fusing position, ejector pin one end is provided with the roof that offsets with the intercommunication board, and the other end cooperates with fusing portion joint, two all be provided with reset spring between roof and the control chamber.

The fuse piece comprises fixing parts respectively connected with the contact blades at two ends, a transition part is arranged between a pair of the fixing parts, and the fusing part is arranged between the transition part and the fixing parts.

The fuse tube is further characterized in that the inner wall of the fuse tube is provided with a pair of guide plates, a guide groove which is connected with the fuse piece in a sliding mode is formed between the pair of guide plates, and the ejector rod is positioned in the guide groove.

The utility model is further arranged that one end of the ejector rod facing the fuse piece is horizontally connected with a butt joint rod propping against the fusing part, and the fixing parts at the two ends are provided with conical guide heads.

The utility model is further arranged in such a way that the notch is arranged in a trapezoid.

The utility model is further provided that an abutting spring is arranged between the communication plate and the control cavity, and the elasticity of the abutting spring is smaller than that of the reset spring.

The utility model is further characterized in that the end part of the contact knife is provided with an elastic clamping groove, and the guide head is provided with a clamping strip which is in plug-in fit with the clamping groove.

In summary, the utility model has the following beneficial effects:

compared with the prior art, the fuse protector can be in a light-off state when the fuse protector is in normal work through the arrangement of the indicator light; when the fuse piece in the fuse melts and breaks, any one ejector rod is in limiting clamping connection with the lost fuse part, so that the ejector rod can reset to drive the top plate to move the communication plate towards the direction of the contact pieces, the communication plate is connected with the contacts of the two contact pieces, the communication of an indicator lamp circuit is realized, and the indicator lamp is lightened; furthermore, when a worker overhauls, the state of the fuse piece in the fuse can be directly observed and judged, so that when a plurality of fuses are overhauled, the broken fuse of the fuse piece can be rapidly found out; and two roof and intercommunication board separation to let no matter what limit's fusing portion fracture, the roof can both drive the intercommunication board and reset and remove, realize the closure to the circuit.

Drawings

Fig. 1 is a perspective view of the present embodiment.

Fig. 2 is a front sectional view of the present embodiment.

Fig. 3 is a partial enlarged view of fig. 2 of the present embodiment.

Fig. 4 is a side sectional view of the present embodiment.

Fig. 5 is a schematic diagram showing the connection of the ejector pin top plate in the present embodiment.

FIG. 6 is a top view of the contact blade and fuse of the present embodiment

Reference numerals: 1-fusing a tube; 2-touching a knife; 3-fuse; 31-fusing part; 32-a fixing part; 33-transition; 4-lamp holder; 41-a mounting cavity; 42-a control chamber; 43-contact; 44-power supply; 45-indicator lights; 46-contacts; 47-communicating plates; 48-ejector rods; 49-top plate; 40-a return spring; 5-guiding plates; 6-a guide groove; 7-abutting the rod; 8-a guide head; 9-notch; 10-abutting a spring; 11-a clamping groove; 12-clamping strips.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-5, the embodiment discloses a fuse, which comprises a fuse tube 1, wherein contact blades 2 are arranged at two ends of the fuse tube 1, and a fuse piece 3 is arranged between the two contact blades 2;

as shown in fig. 2, the fuse 3 includes fixing portions 32 respectively connected to the contact blades 2 at both ends, a transition portion 33 is disposed between a pair of the fixing portions 32, the fusing portion 31 is disposed between the transition portion 33 and the fixing portion 32, and a notch of the fusing portion 31 is trapezoidal;

as shown in fig. 3, a lamp holder 4 is arranged outside the fuse tube 1, and a mounting cavity 41 and a control cavity 42 are arranged in the lamp holder 4; a pair of spaced contact pieces 43 are arranged in the mounting cavity 41, and a power supply 44 and an indicator lamp 45 are connected in series between the pair of contact pieces 43 through wires; the two contacts 43 are not conducted in the initial state, so that the circuit is in an open state, and at this time, the indicator lamp 45 is turned off;

the contact piece 43 extends into the control cavity 42 to form a contact 46, a communication plate 47 for communicating the two contacts 46 is elastically and slidably arranged in the control cavity 42 through a butt spring 10, a pair of ejector rods 48 which are in sliding fit with the control cavity 42 and one end of each ejector rod 48 is positioned in the fuse tube 1 are arranged below the communication plate 47, a top plate 49 is arranged between each ejector rod 48 and the communication plate 47, as shown in fig. 5, the two top plates 49 are arranged in an L shape, and a return spring 40 is arranged between the top plate 49 and the control cavity 42;

in the initial state, since one end of the ejector rod 48 located in the fuse tube 1 is limited by the fuse portion 31 of the fuse, the return spring 40 is compressed, and the ejector rod is away from the contact 46; at this time, since the communication plate 47 loses the pressing force of the top plate 49, the abutting spring 10 pushes the communication plate 47 to disengage from the two contacts 46 and abut against the top plate 49, so that the circuit of the indicator lamp is in an off state; and after one of them fusing part fracture on the fuse 3, arbitrary ejector pin can lose the spacing of fuse to let the roof remove to the contact direction under reset spring's effect, because reset spring's elasticity is greater than the elasticity of butt spring far away, consequently butt spring 10 can be compressed to the inslot, thereby make the intercommunication board 47 can laminate mutually with two contacts 46, realize the intercommunication between two contacts 46, thereby after the fuse fracture, the circuit formation return circuit of pilot lamp 45, the battery supplies power to the pilot lamp, make the pilot lamp light, thereby can remind the fuse fracture in this fuse of staff.

Wherein, the ejector rod and the top plate are made of non-conductor materials.

As shown in fig. 4, the inner wall of the fuse tube 1 is provided with a pair of guide plates 5, a guide groove 6 slidably connected with the fuse piece 3 is formed between the pair of guide plates 5, and the ejector rod 48 is positioned in the guide groove 6; one end of the ejector rod 48 facing the fuse piece 3 is horizontally connected with a butt rod 7 propping against the fusing part 31, and two ends of the fixing part 32 are provided with conical guide heads 8. The conical guide head 8 passes through the space between the guide head 8 and the inner wall of the fuse tube 1 and is propped against the propping rod 7 in the inserting process, so that in the inserting process, the propping rod controls the ejector rod to move downwards to enable the top plate to move away from the contact, and after the fuse piece is in place, the two propping rods 7 are just positioned in the notch of the fuse part to limit the top plate; and the notch 9 is arranged in a trapezoid shape, so that the fuse piece can slide conveniently.

In this embodiment, as shown in fig. 6, an elastic clamping groove 11 is provided at the end of the contact blade 2, and a clamping strip 12 that is in plug-in fit with the clamping groove 11 is provided at the fixing portion.

The elastic clamping groove 11 can be in plug-in fit with the clamping strip 12 arranged on the fixing part, so that the connection of the fuse piece is realized; wherein, the opening of the clamping groove 11 is concavely formed with a groove for clamping and matching the residual clamping strips towards two sides, and after the clamping strips are clamped with the clamping groove 11, the guide head 8 is positioned in the clamping groove.

The above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the present utility model, and any modifications, equivalent substitutions, improvements, etc. within the design concept of the present utility model should be included in the scope of the present utility model.

Claims (7)

1. The fuse comprises a fuse tube (1), wherein contact blades (2) are arranged at two ends of the fuse tube (1), and a fuse piece (3) is arranged between the two contact blades (2), and the fuse is characterized in that a fusing part (31) with a notch (9) is arranged on the fuse piece (3); a lamp holder (4) is arranged on the outer side of the fuse tube (1), an installation cavity (41) and a control cavity (42) are arranged in the lamp holder (4), a pair of contact pieces (43) which are arranged at intervals are arranged in the installation cavity (41), and a power supply (44) and an indicator lamp (45) are connected in series between the pair of contact pieces (43) through wires; the contact piece (43) extends to the control cavity (42) to form a contact (46), a communication plate (47) for communicating the two contacts (46) and a pair of ejector rods (48) corresponding to the position of the fusing part (31) are arranged in the control cavity (42), one end of each ejector rod (48) is provided with a top plate (49) propped against the corresponding communication plate (47), the other end of each ejector rod is matched with the fusing part (31) in a clamping mode, and return springs (40) are arranged between the two top plates (49) and the control cavity (42).

2. A fuse according to claim 1, wherein the fuse element (3) comprises fixing portions (32) connected to the contact blades (2) at both ends, a transition portion (33) is provided between a pair of the fixing portions (32), and the fusing portion (31) is provided between the transition portion (33) and the fixing portion (32).

3. A fuse as in claim 2, wherein the inner wall of the fuse tube (1) is provided with a pair of guide plates (5), a guide groove (6) slidably connected with the fuse piece (3) is formed between a pair of guide plates (5), and the ejector rod (48) is located in the guide groove (6).

4. A fuse as in claim 3, wherein one end of the ejector rod (48) facing the fuse element (3) is horizontally connected with a contact rod (7) which contacts the fuse element (31), and the fixing parts (32) at both ends are provided with tapered guide heads (8).

5. A fuse as per claim 4, characterized in that said notch (9) is arranged in a trapezoid.

6. A fuse as per claim 2, characterized in that an abutment spring (10) is provided between the communication plate (47) and the control chamber (42), the abutment spring (10) having a smaller spring force than the return spring (40).

7. A fuse as claimed in claim 4, characterized in that the contact blade (2) is provided with a resilient clamping groove (11) at the end, the guide head (8) being provided with a clamping strip (12) which is in a plug-in fit with the clamping groove (11).