CN111292918A - Novel electromagnetic piston type electric bell - Google Patents

Abstract

The invention discloses a novel electromagnetic piston type electric bell, which comprises a bell body, a working circuit, a solenoid coil and a piston, wherein the solenoid coil is electrically connected with the working circuit, the piston comprises a ferromagnetic material, the piston reciprocates relative to the axial direction of the solenoid coil under the action of a magnetic field of an electrified solenoid coil and strikes the bell body, at least one pole in the solenoid coil is electrically connected with the working circuit through a binding post and a metal elastic sheet, the metal elastic sheet is detachably and electrically connected with the binding post, the solenoid coil is connected and then drives the piston to move through the magnetic field and impacts the metal elastic sheet to break the working circuit, the electromagnetic solenoid coil and the piston comprising the ferromagnetic material interact through force to continuously impact the bell body to generate sound, compared with the traditional electric bell, the novel electromagnetic piston type electric bell has simple structure and strong failure stability, and the required operating voltage current is also smaller.

Description

Novel electromagnetic piston type electric bell

Technical Field

The invention relates to the technical field of electric bell equipment, in particular to a novel electromagnetic piston type electric bell.

Background

The principle of the electric bell is a classic case in physical electromagnetic teaching, the traditional direct current electric bell mainly comprises an electromagnet, an armature, an elastic metal sheet, a contact, a bell body and the like, the principle is that when current passes through the electromagnet, the electromagnet generates magnetism to attract the armature, a metal elastic sheet drives a bell hammer below to knock the bell body to produce sound, meanwhile, after the armature is attracted by the electromagnet, a conducting sheet on the armature is driven to be separated from the contact to cause the electromagnet to be powered off, the electromagnet loses magnetism, the conducting sheet on the armature is contacted with the contact under the elastic action of the elastic metal sheet on the armature, the electromagnet is powered on again to generate magnetism, and then the actions are repeated; therefore, the bell body is continuously knocked by the bell hammer, and the direct current electric bell continuously rings. Traditional alternating current electric bell and direct current electric bell structure are similar, have only saved the sheetmetal of outage, lean on the alternating current to pass through behind the electro-magnet electromagnetism ferromagnetism and magnetic pole, magnetic force size along with the alternating current periodic variation, attract armature vibrations to strike the sound production of bell body, all have the shortcoming of commonality:

firstly, in order to smoothly make the electric bell work, the electromagnet needs to generate stronger magnetism, so that the electromagnet needs to have a plurality of turns and higher working voltage and current, for example, the effect is often not good when a single or two common dry batteries are used in the physical teaching process, and the direct current 6v or 12v voltage is generally needed for working.

Secondly, the requirement on the elasticity of an elastic metal sheet on the electric bell must be right, if the elastic sheet is too thick, the requirement on the number of turns and the voltage of the electromagnet is high, otherwise, the direct-current electric bell cannot work; if the elastic sheet is too thin and the elastic force is too small, the elastic sheet is easy to deform, and once the elastic sheet deforms, the direct current bell cannot work smoothly.

Thirdly, the distance between the conductor metal sheet on the metal elastic sheet of the traditional direct current electric bell and the contact is troublesome to adjust by the adjusting screw, the gap is not properly adjusted, the direct current electric bell sounds abnormally if the gap is light, and the direct current electric bell cannot work if the gap is serious.

Fourthly, the distance from the bell weight on the metal elastic sheet to the bell body is required to be proper, and even if the gap is adjusted at the beginning, the gap can be changed once the direct current bell is transported and shaken, and the direct current bell cannot work normally.

Disclosure of Invention

The present invention aims at providing a novel electromagnetic piston type electric bell to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a novel electromagnetism piston formula electric bell, includes the bell body and working circuit, its characterized in that: the bell-shaped spring comprises a bell body, and is characterized by further comprising a solenoid coil and a piston, wherein the solenoid coil is electrically connected with a working circuit, the piston comprises a ferromagnetic material, and the piston reciprocates relative to the axial direction of the solenoid coil under the action of the solenoid coil and strikes the bell body.

Preferably, the solenoid coil is wound on a cylindrical skeleton, the piston includes a ferromagnetic member, a guide rod, and a striking hammer, and the piston reciprocates along the axis of the cylindrical skeleton.

Preferably, at least one pole of the solenoid coil is electrically connected with the working circuit through a binding post and a metal elastic sheet, the metal elastic sheet is electrically connected with the binding post in a separable mode, the metal elastic sheet has an elastic trend of keeping the electrical connection with the binding post, and after the solenoid coil is connected, the piston is driven to move through a magnetic field and impacts the metal elastic sheet to enable the working circuit to be disconnected.

Preferably, the piston is further provided with a reset member for restoring the initial position thereof.

Preferably, the reset piece is a spring, a groove for limiting the spring is formed in the end portion of the columnar framework, and the tail end of the guide rod is meshed with the connecting nut.

Preferably, the wiring knob is connected to the wiring terminal through threads, a contact is arranged on the side face of the wiring terminal, and the contact is electrically connected with the wiring knob.

Preferably, one end of the metal elastic sheet is connected with the upright post, the other end of the metal elastic sheet is movably contacted with the contact, the metal elastic sheet is connected into the working circuit, the upright post is provided with a metal rod, and the metal rod is connected with the metal elastic sheet.

Preferably, the operating circuit is a dc circuit.

Preferably, the ferromagnetic material is a permanent magnet, and the working circuit is an alternating current circuit.

Compared with the prior art, the invention has the beneficial effects that:

the electromagnetic solenoid coil and the piston containing the ferromagnetic material are in force interaction, after the solenoid coil is electrified, a strong magnetic field is generated inside the solenoid coil and at the front end and the rear end of the solenoid coil, the magnetic field can generate a magnetic force action on the piston inside the solenoid coil or at the front end and the rear end of the solenoid coil, the piston body moves, meanwhile, the piston moves to drive the working circuit to be powered off, so that no current flows through the solenoid coil, then the metal elastic sheet has the tendency of keeping the working circuit to be electrically connected, the circuit can be powered on again, in addition, the reset process can be more stable as a reset piece through a spring, the piston is driven to return to the original state, even if the working circuit is powered on, at the moment, the solenoid coil is powered on again, the piston does reciprocating motion. Compare traditional direct current electric bell structure this application will reset piece and strike hammer and working circuit separation, do not regard as a part wherein, make device stability stronger to the piston part can also adopt the stronger permanent magnet of magnetism, increases magnetic force interact, also can pass through low voltage alternating current in the working circuit in addition, under the current effect of change, thereby the magnetic field direction that the solenoid coil produced constantly changes and makes piston reciprocating motion hit the bell body and send the sound.

Drawings

FIG. 1 is a top view of example 1 of the present invention;

FIG. 2 is a perspective view of embodiment 1 of the present invention;

FIG. 3 is an exploded view of example 1 of the present invention;

FIG. 4 is a structural view of a groove portion in embodiment 1 of the present invention;

FIG. 5 is a schematic view of two terminals of example 1 of the present invention;

FIG. 6 is an exploded view of example 2 of the present invention;

FIG. 7 is a schematic structural view of example 3 of the present invention;

FIG. 8 is a schematic structural view of example 4 of the present invention;

fig. 9 is a schematic structural diagram of embodiment 5 of the present invention.

In the figure: 1. the dumbbell comprises a bell body, 2, a solenoid coil, 3, a piston, 301, a ferromagnetic piece, 302, a guide rod, 303, a nut, 304, a limiting ring, 305, a push rod, 4, a support, 5, a columnar framework, 501, a groove, 6, a knocking hammer, 7, a wiring terminal, 701, a wiring knob, 702, a contact, 8, a metal elastic sheet, 9, a spring, 10, a stand column, 101, a metal rod, 11 and a base plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The scheme of this application is a novel electromagnetic piston formula electric bell, including the bell body 1 and working circuit, working circuit is the wire electricity and connects the constitution to switch on power supply (if can adopt two sections 1.5V dry battery or other modes), the electric bell still includes solenoid coil 2 and piston 3 in addition, solenoid coil 2 is connected with working circuit electricity, thereby realize producing magnetic field after solenoid coil 2 circular telegram, thereby including ferromagnetic material (can contain the part of permanent magnet or soft iron core material) in piston 3, just piston 3 is reciprocating motion and hits the beating to the bell body 1 for solenoid coil 2's axis direction under solenoid coil 2's effect, thereby realizes the manufacturing of ringtone.

Referring to fig. 1-5, in embodiment 1, a bell body 1 is mounted on a base plate 11, the solenoid coil 2 is wound on a cylindrical skeleton 5, the piston 3 includes a ferromagnetic member 301, a guide rod 302 and a striking hammer 6, the piston 3 penetrates through a central cavity of the cylindrical skeleton 5 and can reciprocate therein, a terminal 7 is further disposed on the base plate 11, a connection knob 701 is connected to the terminal 7 by a screw thread, and a contact 702 is disposed on a side surface, when the connection knob 701 is connected to a lead and screwed into the terminal 7, the contact 702 and the connection knob 701 can be electrically connected, a metal elastic sheet 8 is disposed on the base plate 11 through a column 10, one end of the metal elastic sheet 8 is connected to the column 10, and the other end of the metal elastic sheet 8 is movably contacted with the contact 702 on the terminal 7, and the metal elastic sheet 8 is connected to a working circuit, i.e. the metal rod 101 is disposed on the column 10, the metal rod 101 is connected with the metal elastic sheet 8, one end of the solenoid coil 2 is directly electrically connected with one electrode of the two dry batteries which are connected in series through a lead, the other end of the solenoid coil is electrically connected with the wiring knob 701, the metal elastic sheet 8 is electrically connected with the other electrode of the two dry batteries which are connected in series through the metal rod 101, when the dry batteries are installed in series, the metal elastic sheet 8 is in contact and electrical connection with the contact 702, so that the whole working circuit is looped, the solenoid coil 2 is electrified to generate a magnetic field, the solenoid coil 2 is electrified to generate force on the piston 3 due to the fact that the piston 3 contains the ferromagnetic material, the number of the wiring terminals 7 can be two, and the connection mode is shown in figure 5.

Specifically, the piston 3 includes a ferromagnetic member 301, a guide rod 302, and a striking hammer 6, the piston 3 penetrates through a central cavity of the cylindrical frame 5 and reciprocates therein, and if the ferromagnetic member 301 is a soft iron core, the solenoid coil 2 is energized to generate an attractive force on the piston 3, so that the guide rod 302 penetrates through the center (hollow in the middle) of the cylindrical frame 5 and moves toward the metal elastic piece 8, and after the contact, the metal elastic piece 8 is separated from the contact 702, so that the operating circuit is disconnected, and the magnetic field generated by the solenoid coil 2 disappears.

Specifically, the piston 3 can be reset by bringing the metal dome 8 into contact with the contact 702, that is, by making the operating circuit complete again, at least two of the following methods, alone or in combination.

The first method comprises the following steps: metal shrapnel 8 adopts elastic metal (like the phosphorus copper sheet), and metal shrapnel 8 has the elasticity trend that keeps being connected (being the left end and the contact of contact 702) with terminal 7 electricity, and metal shrapnel 8 resets under its self elastic action this moment, can promote guide bar 302 antedisplacement once more to let strike hammer 6 and hit the bell body 1 and realize the jingle bell, metal shrapnel 8 and contact 702 once more realize the work circuit switch-on simultaneously, so reciprocal realization constantly jingle bell.

Secondly, the piston 3 is further provided with a restoring member for restoring the initial position thereof, that is, specifically, a spring 9 is provided between the striking hammer 6 and the end of the columnar frame 5 and outside the guide rod 302, and the piston 3 is restored by the elastic force of the spring 9 to reconnect the operating circuit.

Of course, if the force recovery effect is not good only by the metal dome 8, and a malfunction of inaccurate adjustment may occur, the above structure may coexist.

Specifically, for the convenience of installation, the end of the cylindrical skeleton 5 is provided with a groove 501 for limiting the spring 9, the tail end of the guide rod 302 is engaged with the connecting nut 303, the end of the guide rod 302 is spherical as shown in fig. 3, which is beneficial for pushing the metal elastic sheet 8 to move, and the installation of the ferromagnetic piece 301 is facilitated by the engagement form of the nut 303 and the matching of the limiting ring 304 on the guide rod 302, although the ferromagnetic piece 301 can also be connected with the guide rod 302 by other means, such as gluing.

Referring to fig. 6, in embodiment 2, since the magnetic field generated by the solenoid coil 2 after being energized is not only inside but also has magnetic fields at both ends, the motion track of the plunger 3 does not necessarily need to pass through the cylindrical skeleton 5, and the motion can be realized at both ends thereof, so that the working circuit is repeatedly switched on and off (the working circuit connection method is the same as that of embodiment 1), for example, as shown in fig. 6, the terminal 7, the metal elastic sheet 8, the plunger 3, and the bell body 1 are all located at one side of the solenoid coil 2, the plunger 3 is slidably supported by two supports 4, when the working circuit is switched on, the solenoid coil 2 generates a magnetic field to exert a force on the ferromagnetic member 301, so as to push the metal elastic sheet 8, thereby switching off the working circuit, and the plunger 3 is reset under the action of the reset member, in this case, one end of the spring 9 is connected with the, thereby achieving elastic recovery.

The same embodiment 3 refers to fig. 7, in this case, the piston 3 moves half inside the solenoid coil 2 and half outside, and in this case, a push rod 305 is connected to the piston 3 for contacting the metal elastic sheet 8 during the movement of the piston 3 to break the working circuit, and then resetting again to switch on under the action of the spring 9, thus repeatedly realizing ringing.

Compared with the traditional direct current electric bell, the embodiment 1, the embodiment 2 and the embodiment 3 have the advantages that the knocking part (the knocking hammer 6) is separated from the power-on and power-off part (the metal elastic sheet 8), the use stability is higher, the piston 3 contains a ferromagnetic material, the required voltage can be effectively reduced, the traditional direct current electric bell generally needs 6V or 9V dry batteries, and the structure of the direct current electric bell can be well driven only by two dry batteries (3V).

In addition, for the above three embodiments, the ferromagnetic member 301 may also be a permanent magnet such as an ndfeb magnet, and the ndfeb magnet may have a stronger acting force with the magnetic field of the energized solenoid coil 2, so as to effectively reduce the number of turns required for the solenoid coil 2 or reduce the required voltage of the dry battery to a certain extent. It should be noted that the current flow direction of the working circuit is to ensure that when the working circuit is connected, the permanent magnet will drive the piston 3 to move towards the metal elastic sheet 8 under the action of the magnetic field generated by the solenoid coil 2, so that the metal elastic sheet 8 is separated from the contact 702, and the working circuit is disconnected.

Referring to fig. 8, in embodiment 4, two ends of a working circuit are directly electrically connected to two ends of a solenoid coil 2, current in the working circuit adopts alternating current, a ferromagnetic member 301 in a piston 3 adopts a permanent magnet, as shown in fig. 8, the piston 3 is slidably supported by two supports 4, and when the working circuit works by applying alternating current, a magnetic field of the solenoid coil 2 is continuously changed, so that the ferromagnetic member 301 drives the piston 3 to reciprocate, thereby driving a knocking hammer 6 to knock a bell body 1.

As shown in embodiment 5 of fig. 9, in the case of using an ac circuit, the positions of the piston 3 and the solenoid coil 2 may be arranged in various ways, and a part of the piston 3 is located in the solenoid coil 2, so that when the working circuit is energized with ac power for working, the magnetic field of the solenoid coil 2 is continuously changed, and the ferromagnetic member 301 drives the piston 3 to reciprocate, thereby driving the knocking hammer 6 to knock the bell body 1.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a novel electromagnetism piston formula electric bell, includes the bell body (1) and working circuit, its characterized in that: the bell body beating machine is characterized by further comprising a solenoid coil (2) and a piston (3), wherein the solenoid coil (2) is electrically connected with a working circuit, the piston (3) comprises a ferromagnetic material, and the piston (3) reciprocates and beats the bell body (1) relative to the axis direction of the solenoid coil (2) under the action of a magnetic field generated after the solenoid coil (2) is electrified.

2. The new electromagnetic piston type electric bell according to claim 1, characterized in that: the solenoid coil (2) is wound on the columnar framework (5), the piston (3) comprises a ferromagnetic piece (301), a guide rod (302) and a knocking hammer (6), and the piston (3) reciprocates along the axial direction of the columnar framework (5).

3. The new electromagnetic piston type electric bell according to claim 2, characterized in that: at least one pole of the solenoid coil (2) is electrically connected with the working circuit through the wiring terminal (7) and the metal elastic sheet (8), the metal elastic sheet (8) is electrically connected with the wiring terminal (7) in a separable mode, and the solenoid coil (2) is connected and then drives the piston (3) to move through the magnetic field and impacts the metal elastic sheet (8) to enable the working circuit to be broken.

4. The new electromagnetic piston type electric bell according to claim 2, characterized in that: the piston (3) is also provided with a resetting piece for restoring the initial position of the piston.

5. The new electromagnetic piston type electric bell according to claim 4, characterized in that: the reset piece is a spring (9), a groove (501) used for limiting the spring (9) is formed in the end portion of the columnar framework (5), and the tail end of the guide rod (302) is meshed with the connecting nut (303).

6. A novel electromagnetic piston type electric bell according to claim 3, characterized in that: and the metal elastic sheet (8) has the elastic tendency of keeping the electric connection with the binding post (7).

7. A novel electromagnetic piston type electric bell according to claim 3, characterized in that: the wiring knob (701) is connected to the wiring post (7) through threads, a contact (702) is arranged on the side face of the wiring post (7), and the contact (702) is electrically connected with the wiring knob (701).

8. The new electromagnetic piston type electric bell according to claim 7, characterized in that: one end of the metal elastic sheet (8) is connected with the upright post (10), the other end of the metal elastic sheet (8) is movably contacted with the contact (702), the metal elastic sheet (8) is connected into a working circuit, a metal rod (101) is arranged on the upright post (10), and the metal rod (101) is connected with the metal elastic sheet (8).

9. A novel electromagnetic piston type electric bell according to any one of claims 1-8, characterized in that: the working circuit is a direct current circuit.

10. A novel electromagnetic piston type electric bell according to claim 1 or 2, characterized in that: the ferromagnetic material is a permanent magnet, and the working circuit is an alternating current circuit.

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