CN208608100U - A kind of single-pole double-throw switch (SPDT) - Google Patents

Abstract

The utility model discloses a kind of single-pole double-throw switch (SPDT)s, including switch base, electrode connecting piece, middle electrode, side electrode, switch knob and attachment base, the attachment base includes first clamping piece, second intermediate plate, pressing plate, connecting rod, supporting element and spring, the supporting element is from top to bottom inserted into the switch base, the upper end of the supporting element is connect with the first clamping piece, the first clamping piece is equipped with through-hole, the connecting rod passes through the through-hole, the lower end of the connecting rod is connect with the second intermediate plate, upper end is connect with the pressing plate, the spring is set to the lower section of the second clamping plate.Compared with prior art, the utility model is when needing to connect electric wire, by lower platen, second intermediate plate is moved downward, and second intermediate plate and first clamping piece are separated at this time, it will be in the gap of both electric wire insertions, pressing plate is unclamped, under the action of the spring, electric wire is clamped by first clamping piece and second intermediate plate, it is easy to operate to easily realize the connection of electric wire and switch.

Description

A kind of single-pole double-throw switch (SPDT)

Technical field

The utility model relates to field of switches, in particular to a kind of single-pole double-throw switch (SPDT).

Background technique

Single-pole double-throw switch (SPDT) is widely used in experimental teaching, such as potential difference meter and the experiment of wheatstone bridge measuring resistance.By this Kind switch is connected in circuit, by the unlatching and closure of switch knob, plays the role of disconnection and connection circuit.Single-pole double throw Switch needs the connector for connecting electric wire, and existing connector is all by screw rod in such a way that nut connects, by electric wire pressure Connection is tightly realized between screw rod and nut, it is inconvenient that this mode connects electric wire, during turn nut, It is easy to drive electric wire mobile, so that electric wire is moved to other than the region between screw rod and nut, under such circumstances, just must Nut must be unscrewed again, electric wire is replaced in the region between screw rod and nut, repeat screwing operations.In view of this, this Inventor obtains a kind of single-pole double-throw switch (SPDT) by further investigation.

Utility model content

The purpose of the utility model is to provide a kind of single-pole double-throw switch (SPDT)s, have the advantages that easy to operate.

The above-mentioned technical purpose of the utility model has the technical scheme that

A kind of single-pole double-throw switch (SPDT), including switch base, electrode connecting piece, middle electrode, side electrode, switch knob and connection Seat, the switch base are the upper surface insertion switch base of hollow structure, the middle electrode and side electrode by the switch base In and be fixed on the switch base, the switch knob is connected on the middle electrode, and the quantity of the side electrode is two And be located at the two sides of the middle electrode, the attachment base include first clamping piece, second intermediate plate, pressing plate, connecting rod, supporting element and Spring, the supporting element are from top to bottom inserted into the switch base and are fixed on the switch base, the upper end of the supporting element It is connect with the edge of the first clamping piece, the first clamping piece is equipped with the through-hole of length direction from top to bottom, and the connecting rod is worn The through-hole is crossed, the lower end of the connecting rod is connect with the second intermediate plate, and upper end is connect with the pressing plate, and the spring is set to institute The lower section of second intermediate plate is stated, the upper end of the spring is resisted against in the second intermediate plate, and lower end is resisted against on the switch base, institute The quantity for stating attachment base and electrode connecting piece is respectively three, and the electrode connecting piece is located inside the switch base, the side Electrode and middle electrode pass through the electrode connecting piece respectively and the supporting element of the attachment base connects one to one, and described One intermediate plate and supporting element use conductive material.

Further to improve: the supporting element includes support rod, and the lower end of the support rod is connect with electrode connecting piece, on End is connect with the first clamping piece.

Further to improve: the quantity of the support rod is four and equidistantly distributed.

It is further to improve: the upper surface of the switch base offer with the one-to-one groove in the connection seat position, The lower end of the spring is resisted against the bottom of the groove, and the support rod is inserted into the switch base by the bottom portion of groove.

Further to improve: the pressing plate, first clamping piece and second intermediate plate are circle.

Compared with prior art, the utility model provides a kind of single-pole double-throw switch (SPDT), in normal state when, due to bullet Spring gives second intermediate plate one upward power, and second intermediate plate is bonded to each other with first clamping piece, when needing to connect electric wire, by pushing Plate, pressure pass to spring via connecting rod and second intermediate plate, and spring is compressed, so that second intermediate plate moves downward, at this time second Intermediate plate and first clamping piece are separated, and have gap between the two, and electric wire is inserted into gap, pressing plate is then unclamped, in spring Under effect, electric wire is clamped by first clamping piece and second intermediate plate, so that the connection of electric wire and switch is easily realized, operation ten It is convenient to divide.

Detailed description of the invention

Fig. 1 is that the utility model relates to a kind of axonometric drawings of single-pole double-throw switch (SPDT).

Fig. 2 is that the utility model relates to a kind of positive structure schematics of single-pole double-throw switch (SPDT).

In figure

Switch base -1；Groove -11；Middle electrode -2；

Side electrode -3；Switch knob -4；First clamping piece -51；

Second intermediate plate -52；Pressing plate -53；Connecting rod -54；

Spring -55；Support rod -56.

Specific embodiment

The utility model is described in further detail below in conjunction with attached drawing.

This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but As long as all by the protection of Patent Law in the scope of the claims of the utility model.

As shown in Figure 1 and Figure 2, a kind of single-pole double-throw switch (SPDT), including switch base 1, electrode connecting piece, middle electrode 2, side electrode 3, switch knob 4 and attachment base, the switch base 1 are hollow structure, and the middle electrode 2 and side electrode 3 are by the switch base 1 Upper surface is inserted into the switch base 1 and is fixed on the switch base 1, and the switch knob 4 is connected to the middle electrode 2 On, the quantity of the side electrode 3 is two and is located at the two sides of the middle electrode 2, and the attachment base includes first clamping piece 51, second intermediate plate 52, pressing plate 53, connecting rod 54, supporting element and spring 55, the supporting element are from top to bottom inserted into the switch base 1 In and be fixed on the switch base 1, the upper end of the supporting element is connect with the edge of the first clamping piece 51, it is described first folder Piece 51 is equipped with the through-hole of length direction from top to bottom, and the connecting rod 54 passes through the through-hole, the lower end of the connecting rod 54 and institute The connection of second intermediate plate 52 is stated, upper end is connect with the pressing plate 53, and the spring 55 is set to the lower section of the second intermediate plate 52, institute The upper end for stating spring 55 is resisted against in the second intermediate plate 52, and lower end is resisted against on the switch base 1, the attachment base and electrode The quantity of connection sheet is respectively three, and the electrode connecting piece is located inside the switch base 1, the side electrode 3 and middle electrode 2 It is connected one to one respectively by an electrode connecting piece and the supporting element of the attachment base, the first clamping piece 51 and branch Support member uses conductive material, and conductive material herein can select copper or iron.

It should be noted that the side electrode 3, middle electrode 2, switch base 1, electrode connecting piece and switch knob 4 are set It sets and is no different with general single-pole double-throw switch (SPDT), sufficiently open in the prior art, how above-mentioned each component is fixed on switch It is also sufficiently open in the prior art on seat 1, it repeats no more.

A kind of single-pole double-throw switch (SPDT) of the present embodiment under normal conditions, due to supporting for the spring 55, the first clamping piece 51 and second intermediate plate 52 be bonded to each other, when needing to connect electric wire, press the pressing plate 53, pressure is via pressing plate 53, connecting rod 54 It is transferred to spring 55 with second intermediate plate 52, so that spring 55 is compressed, the pressing plate 53, connecting rod 54 and second intermediate plate 52 are whole It moves down, first clamping piece 51 and second intermediate plate 52 are separated, at this point, electric wire is inserted into first clamping piece 51 and second intermediate plate 52 Between space in, then unclamp pressing plate 53, the pressing plate 53, connecting rod 54 and second intermediate plate 52 under the action of spring 55 upwards Movement completes the installation connection of electric wire so that electric wire is sandwiched between the first clamping piece 51 and second intermediate plate 52, entire to grasp It is very convenient to make process.

Specifically, the supporting element includes support rod 56, the lower end of the support rod 56 is connect with electrode connecting piece, upper end It is connect with the first clamping piece 51, at work, one kind of electric current flows through mode are as follows: the first clamping piece 51 of an attachment base to branch Strut 56, electrode connecting piece, side electrode 3, switch knob 4, middle electrode 2, electrode connecting piece, another attachment base support rod 56 With first clamping piece 51, this is a kind of type of flow of electric current, in the handoff procedure of switch knob 4, the type of flow of electric current Can accordingly it change.

Specifically, the quantity of the support rod 56 is four and equidistantly distributed, equidistantly distributed here is actually It is distributed by center of circle even circumferential of the center of the first clamping piece 51.

Specifically, the upper surface of the switch base 1 offer with the one-to-one groove 11 in the connection seat position, it is described The lower end of spring 55 is resisted against the bottom of the groove 11, and the support rod 56 is inserted into the switch base by 11 bottom of groove In 1.

Specifically, the pressing plate 53, first clamping piece 51 and second intermediate plate 52 are circle.

Upper and lower equal statement for indicating orientation described in the present embodiment is the convenience of statement and apparent, only this reality Positional relationship when putting in a kind of single-pole double-throw switch (SPDT) such as Fig. 2 of example is applied, does not represent the orientation limitation stringent to each component.

The above-mentioned description to embodiment is to understand convenient for those skilled in the art and using originally practical new Type, person skilled in the art obviously easily can make various modifications to embodiment, and described herein general Principle is applied in other embodiments without having to go through creative labor.Therefore, the utility model is not limited to the above embodiments, Those skilled in the art's announcement according to the present utility model, does not depart from improvement that the utility model scope is made and modification is all answered This is within the protection scope of the utility model.

Claims (5)

1. a kind of single-pole double-throw switch (SPDT), it is characterised in that: including switch base, electrode connecting piece, middle electrode, side electrode, switch hand Handle and attachment base, the switch base are the upper surface insertion institute of hollow structure, the middle electrode and side electrode by the switch base It states in switch base and is fixed on the switch base, the switch knob is connected on the middle electrode, the number of the side electrode Amount is two and is located at the two sides of the middle electrode, the attachment base include first clamping piece, second intermediate plate, pressing plate, connecting rod, Supporting element and spring, the supporting element are from top to bottom inserted into the switch base and are fixed on the switch base, the support The upper end of part is connect with the edge of the first clamping piece, and the first clamping piece is equipped with the through-hole of length direction from top to bottom, institute Connecting rod is stated across the through-hole, the lower end of the connecting rod is connect with the second intermediate plate, and upper end is connect with the pressing plate, the bullet Spring is set to the lower section of the second intermediate plate, and the upper end of the spring is resisted against in the second intermediate plate, and lower end is resisted against described open It closes on seat, the quantity of the attachment base and electrode connecting piece is respectively three, and the electrode connecting piece is located in the switch base Portion, the side electrode and middle electrode pass through the electrode connecting piece respectively and the supporting element of the attachment base corresponds company It connects, the first clamping piece and supporting element use conductive material.

2. a kind of single-pole double-throw switch (SPDT) according to claim 1, it is characterised in that: the supporting element includes support rod, described The lower end of support rod is connect with electrode connecting piece, and upper end is connect with the first clamping piece.

3. a kind of single-pole double-throw switch (SPDT) according to claim 2, it is characterised in that: the quantity of the support rod is four and waits Spacing distribution.

4. a kind of single-pole double-throw switch (SPDT) according to claim 2, it is characterised in that: the upper surface of the switch base offer with The one-to-one groove in connection seat position, the lower end of the spring are resisted against the bottom of the groove, the support rod by The bottom portion of groove is inserted into the switch base.

5. a kind of single-pole double-throw switch (SPDT) according to claim 1, it is characterised in that: the pressing plate, first clamping piece and the second folder Piece is circle.