CN104007304A - Universal meter with battery box - Google Patents

Abstract

The invention relates to a multimeter with a battery box, which relates to the field of instruments, and the technical problem is to protect the battery from falling out of the multimeter. Technical solution: a multimeter with a battery box, including a watch case and a battery box, the battery box is provided with a battery compartment, the watch case is provided with a battery box groove, and the battery box is arranged in the battery box groove; There is an insurance mechanism, which includes a dial pin, a reset device, and a pair of pin holes that are respectively arranged on the watch case and the battery box to face the openings. Beneficial effect: because the battery box is locked in the watch case by adding a pin, compared with the multimeter without battery protection, the battery installation quality is better, and the battery will not fall out of the multimeter; because the pin can be locked and locked Compared with the multimeter with fixing screws on the battery box, it is more convenient to replace the battery when the battery box is not locked.

Description

Multimeter with battery case

technical field

The invention relates to the field of instruments, in particular to a multimeter with a battery box.

Background technique

A multimeter is a common measuring instrument used to measure voltage, current, and resistance. In order to ensure the normal operation of the multimeter, a battery is usually installed as a basic energy source. During the use of the multimeter, it is unavoidable to encounter accidental drops and falls, and the battery of the multimeter is often thrown out due to this. In order to solve this problem, most multimeters add fixing screws on their battery boxes, and the battery box and the watch case are fixed by fixing screws. some inconvenience.

In addition, the quality of cooperation between the battery and the multimeter is often not high. After the multimeter is dropped and hit, the mutual position between the battery and the multimeter may change, affecting the electrode contact. In order to solve this problem, the battery compartment of the multimeter is designed to fit the outer contour of the battery as much as possible, but at the same time it will increase the scrap rate.

Contents of the invention

The technical problem to be solved by the present invention is to provide a multimeter with a battery box to protect the battery from falling out of the multimeter.

The technical scheme adopted by the present invention to solve its technical problems is: a multimeter with a battery box, including a watch case and a battery box, the battery box is provided with a battery compartment, the watch case is provided with a battery box groove, and the battery box is arranged in the battery box groove Inside; there is a safety mechanism between the watch case and the battery box, and the safety mechanism includes a dial pin, a reset device, and a pair of pin holes that are respectively arranged on the watch case and the battery box to face the openings; A sliding hole connected to the hole, the dial pin includes a pin rod and a dial machine, the pin rod is arranged in the pair of pin holes and is slidably connected with the two pin holes, the direction of the sliding connection is the axial direction of the pin hole, and the dial machine is arranged on the pin rod And extend through the sliding hole to the outside of the pin hole; the reset device acts between the dial pin and any pin hole; when there is no external force to toggle the dial pin, under the action of the reset device, the two ends of the pin rod are respectively in the watch case and the battery box In the pin hole on the watch case, the battery box is in a locked state; when the toggle pin is turned so that both ends of the pin rod are in the pin holes of the watch case or the battery box at the same time, the locked state of the battery box is released.

Further: the reset device is a pin spring, the sliding hole is a long hole and is arranged on the side wall of the pin hole; the pin hole is a stepped hole, the pin rod is provided with a raised structure, and the pin spring is sleeved on the pin rod and one end is against the On the stepped surface of the stepped hole, the other end abuts against the protruding structure.

Further: the sliding hole is set on the case.

Further: a fixing mechanism is provided between the battery box groove and the battery box, and the fixing mechanism is composed of a set of bayonet pins and bayonet slots, and the watch case and the battery box are installed together through the fixing mechanism.

Further: the card slot is a concave structure arranged on the inner wall of the battery box slot; the bayonet pin is a long strip plate with a protruding structure corresponding to the card slot; the outer wall of the battery box is provided with a The end faces a recessed groove in the direction of the bottom surface of the battery box, and the bayonet pin is connected to the battery box, and only one end of the bayonet pin is connected to the bottom of the groove, and the end not connected to the battery box extends to the outer end surface of the battery box; the inner surface of the bayonet pin is connected to the bottom of the groove. There is a toggle gap between the battery boxes.

Further: the battery box is provided with a detachable battery base, and the battery base is provided with a card seat; the battery box is provided with a baffle parallel to any side thereof, and a base groove is provided between the baffle and the side, and the battery base is provided In the base groove, there is a gap on the baffle plate, through which the card seat contacts with the electrodes of the battery in the battery compartment; the card seat is connected with the circuit in the watch case by a wire.

Further: the end of the battery box provided with the base groove is set at the bottom of the battery box groove of the battery box groove, and the length of the wire is greater than the depth of the battery box groove.

Further: the bottom of the battery box groove is provided with a battery box spring acting on the battery box.

Further: the bottom of the battery compartment of the battery box is provided with a through hole.

The beneficial effects of the present invention are: because the battery case can be locked in the watch case by adding the dial pin, compared with the multimeter without battery protection, the battery installation quality is better, and the multimeter will not fall out; because the dial pin can Compared with the multimeter with fixing screws on the battery box, it is more convenient to replace the battery by switching between the locked and unlocked battery boxes.

Description of drawings

Fig. 1 is an explosion diagram of the present invention;

Figure 2 is a schematic diagram of the battery box;

Fig. 3 is the schematic diagram of watch case;

Fig. 4 is the schematic diagram of dial pin and pin hole;

Fig. 5, Fig. 6 are the schematic diagrams of two kinds of dial pins;

Reference signs: 1-watch case, 2-battery box, 21-outer surface of battery box, 22-toggle gap, 3-dial pin, 31-pin rod, 32-dial machine, 33-protruding structure, 4- Pin spring, 5-battery box spring, 6-battery base, 7-bay pin, 71-protruding structure, 8-card slot, 9-pin hole, 91-sliding hole, 92-step surface, 10-wire, 11-through hole, 12-battery box bottom surface, 13-battery, 14-card seat, 15-battery box slot, 16-baffle plate, 17-battery box slot bottom, 101-pin hole back.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Fig. 1 and Fig. 2, the multimeter with battery box of the present invention also includes battery box 2, and this battery box 2 is provided with battery compartment, and watch case 1 is provided with battery box slot 15, and battery box 2 is arranged on the battery box. In the box groove 15; between the watch case 1 and the battery box 2, a safety mechanism is provided, and the safety mechanism includes a dial pin 3, a reset device, and a pair of pin holes that are respectively arranged on the watch case 1 and the battery box 2. 9; the pin hole 9 is provided with a sliding hole 91 communicating with the pin hole 9, the dial pin 3 includes a pin rod 31 and a dial machine 32, the pin rod 31 is arranged in the pair of pin holes 9 and is slidably connected with the two pin holes 9, The direction of the sliding connection is the axial direction of the pin hole 9, and the dial 32 is arranged on the pin rod 31 and extends to the outside of the pin hole 9 through the sliding hole 91; the reset device acts between the dial pin 3 and any pin hole 9; When there is no external force to toggle the dial pin 3, under the action of the reset device, the two ends of the pin rod 31 are respectively in the pin holes 9 on the watch case 1 and the battery box 2, and the battery box 2 is in a locked state; When both ends of the pin rod 31 are in the pin hole 9 of the watch case 1 or the battery box 2 at the same time, the locked state of the battery box 2 is released.

The function of the battery box 2 is to install the battery 13 . The effect of the battery case groove 15 is to install the battery case 2 . The function of the safety mechanism is to prevent the battery box 2 from falling out of the battery box groove 15, and there are two states: 1. Generally, the two ends of the pin rod 31 of the dial pin 3 are respectively located in the pin holes 9 of the battery box 2 and the watch case 1. 2. When it is necessary to take out the battery box 2, turn the toggle pin 3 so that the pin rod 31 is completely in the pin hole 9 of the battery box 2 or watch case 1. At this time, the battery box 2 is in a non-locked state. The effect of dialing machine 32 is in order to move pin bar 31 conveniently. Toggle dial 32 is provided with sliding hole 91 on pin hole 9 for convenience, and dial 32 is arranged on outside pin hole 9 after passing slide hole 91, can not be affected by pin hole 9 when stirring dial 32. The function of the reset device is: 1. When there is no external force, the locked state of the battery box 2 is maintained; 2. After the dial pin 3 is toggled, the dial pin 3 can be automatically reset. The reset device can be a spring, elastic rubber, shrapnel, etc. Pull back mechanism. The depth of at least one of the two pin holes 9 is greater than the length of the pin rod 31 to ensure that the pin rod 31 can be completely received in one of the pin holes 9, that is, to ensure that the pin rod 3 can be separated from the other pin hole 9, and the watch case 1 It is necessary to provide an installation position for the reset device, as shown in Figure 5 and Figure 6, the position can be inside or outside the pin hole 9. When the resetting device is arranged in the pin hole 9, it is also necessary to adjust the length of the pin rod 31 in consideration of the arrangement of the striker spring 4.

Whether the battery box 2 is locked or not can be changed by turning the dial pin 3. In the locked state, the battery box 2 will not easily fall out of the watch case 1; and in the non-locked state, the battery box 2 can be easily taken out . The beneficial effects of the present invention are: compared with the multimeter without battery protection, the installation quality of the battery is better, and the multimeter will not easily fall out; convenient.

Fig. 5 and Fig. 6 respectively show two kinds of settings of the dial pin 3: 1. As shown in Fig. 5, the sliding hole 91 is a through hole arranged at the bottom of the pin hole 9, and the dial 32 extends from the end of the pin rod 31 and passes through the sliding The hole 91 is arranged on the back side 101 of the pin hole 9, and the state of whether the battery box 2 is locked or not is changed by pulling the dial 32 axially on the pin rod 31; 2. As shown in Figure 6, the sliding hole 91 is a long hole and is arranged in the pin hole 9, the length direction of the sliding hole 91 is located in the axial direction of the pin hole 9.

Fig. 4 represents a kind of preferred embodiment of dial pin 3 of the present invention, and concrete scheme is: reset device is dial spring 4, and sliding hole 91 is elongated hole and is arranged on the sidewall of pin hole 9; Pin hole 9 is a step hole, the pin rod 31 is provided with a protruding structure 33, and the pin spring 4 is sleeved on the pin rod 31, and one end is against the stepped surface 92 of the stepped hole, and the other end is against the protruding structure 33.

In general, under the elastic force of the pin spring 4, the two ends of the pin bar 31 are respectively in different pin holes 9, and the battery case 2 is in a locked state; when the battery 13 needs to be replaced, the pin 3 is moved to make the pin bar 31 both ends are in the pin hole 9 that is provided with sliding hole 91, now the pin bar 31 is separated from the other pin hole 9, the locked state of the battery box 2 is released, the battery box 2 is taken out at this time, and the battery 13 is installed Insert the battery box 2, release the pin 3 to lock the battery box 2 again.

The beneficial effects of this scheme are: the sliding range of the sliding connection between the pin rod 31 and the pin hole 9 is better controlled; the structure is relatively compact;

Generally, the pin rods 31 are all in the pin hole 9 provided with the sliding hole 91 , and the pin hole 9 can be set on the battery box 2 or on the watch case 1 . Preferably, in this embodiment: the sliding hole 91 is arranged on the watch case 1 .

The beneficial effect of the optimal solution is: after the battery case 2 is taken out, the dial pin 3 will stretch out the pin hole 9 provided with the sliding hole 91 under the action of the dial spring 4, if the dial pin 3 is arranged on the battery case 2, dial The protruding part of the pin 3 is easily damaged by collision; if the pin 3 is arranged on the watch case 1, the protruding part of the pin 3 is just in the battery box groove 15 vacated after taking out the battery box 2, which is safer.

The installation quality of the battery case 2 and the battery case groove 15 is directly related to the contact between the battery 13 and the multimeter. If the installation quality is not high, after shaking and beating the multimeter, even if the battery 13 does not fall off, the vibration and shaking of the beating multimeter may make the electrodes of the battery 13 move out of the best position in contact with the deck 14, causing poor contact. To improve the installation quality of the battery 13, the manufacturing accuracy of the battery case 2 and the battery case groove 15 can be improved, but this will increase the production difficulty and scrap rate. In this embodiment: a fixing mechanism is provided between the battery box groove 15 and the battery box 2, and the fixing mechanism is composed of a set of bayonet pin 7 and a bayonet slot 8, and the watch case 1 and the battery box 2 are installed together through the fixing mechanism.

The function of the fixing mechanism is to improve the matching quality between the battery box 2 and the battery box groove 15. The fixing mechanism is composed of a pair of locking pins 7 and locking grooves 8, which are respectively arranged on the battery box groove 15 and the battery box 2. The battery box 15 When being installed in the battery case groove 15, the bayonet pin 7 and the bayonet groove 8 make the cooperation of the two better.

The structure of the bayonet 7 and the bayonet 8 can be the following situations: 1. The bayonet 8 provides a structure similar to the sliding track for the bayonet 7, limiting the bayonet 7 to move in only one direction; 2. The bayonet 8 has a concave or convex structure, and the corresponding bayonet 7 is provided with a convex or concave structure, and the cooperation between the two further limits the degree of freedom between the two. The two structures of bayonet pin 7 and bayonet slot 8 can cooperate with the safety mechanism to completely limit the relative movement between battery box 2 and battery box slot 15, but the second structure has a better restriction effect. In this embodiment after optimization: the bayonet slot 8 is a concave structure arranged on the inner wall of the battery box groove 15; the bayonet pin 7 is a long strip plate, and the protruding structure 71 corresponding to the card slot 8 is provided on the plate; the outer wall of the battery box 2 is provided with a battery box The outer end surface 21 is recessed toward the bottom surface 12 of the battery box. The bayonet pin 7 is connected to the battery box 2, and only one end of the bayonet pin 7 is connected to the bottom of the groove, and the end not connected to the battery box 2 extends to the outside of the battery box. End surface 21 ; a toggle gap 22 is provided between the inner surface of bayonet pin 7 and battery case 2 .

The bottom surface 12 of the battery box refers to the surface parallel to the bottom 17 of the battery box in the battery compartment, and is close to one end of the bottom 17 of the battery box. The bottom 17 of the battery box corresponds to the notch of the battery box. The toggle gap 22 is provided for the bayonet pin 7, and its structure is: it is arranged on the outer end surface 21 of the battery case, and the groove recessed inward by the side wall where the bayonet pin 7 is arranged is used to enable the bayonet pin 7 to be toggled. The cooperation relationship between the bayonet pin 7 and the bayonet slot 8 is loosened, so that the battery box 2 can be easily taken out.

Under normal circumstances, the protruding structure 71 of the bayonet 7 catches the recessed structure of the bayonet 8, and further locks the battery box 2; The protruding structure 71 of 7 is separated from the concave structure of the card slot 8, and then the toggle pin 3 is moved to release the locked state of the battery box 2; after the detent 7 is released, the detent 7 will return due to elasticity, and when the battery 13 When the battery box 2 is loaded into the battery box 2 and the battery box 2 is to be repacked into the battery box slot 15, the protruding structure 71 will automatically cooperate with the slot 8 when the battery box 2 is put back because the bayonet pin 7 itself is elastic.

The beneficial effect of this solution is: the installation quality of the battery box 2 is better.

The electrodes of the battery 13 need to be connected to the circuit of the multimeter. During specific implementation: the holder 14 corresponding to the electrode can be arranged on the battery box 2; Reserve the position where the electrodes of the battery 13 are in contact with the deck 14; through improvement in this embodiment: the battery box 2 is provided with a detachable battery base 6, and the battery base 6 is provided with a deck 14; A baffle plate 16 parallel to any side thereof, a base groove is provided between the baffle plate 16 and the side surface, the battery base 6 is arranged in the base groove, a gap is provided on the baffle plate 16, and the card holder 14 passes through the gap to connect with the battery compartment. The electrodes of the battery 13 are in contact;

The card holder 14 is a mechanism corresponding to the electrodes of the battery 13 and connecting the electrodes with the circuit in the watch case 1 . The side walls of the battery box 2 refer to the walls around the battery box 2 . In order to facilitate the disassembly of the battery case 2 , when the wire 10 has a certain length, the wire 10 will not be damaged by pulling the wire 10 when the battery case 2 is taken out of the battery case slot 15 . The beneficial effect of this technical solution is that the detachable battery base 6 is easier to maintain and easier to replace when damaged.

The base groove can be arranged at a position close to the notch of the battery box groove 15, or at a position close to the bottom 17 of the battery box groove. In this preferred embodiment: the battery box 2 is provided with one end of the base groove at the bottom of the battery box groove 17. The length of the wire 10 is greater than the depth of the groove 15 of the battery box.

The battery case 2 is arranged on the bottom 17 of the battery case groove by one end of the base groove to make the mechanism more reasonable. The length of the lead 10 is greater than the depth of the battery case groove 15 to ensure that the lead 10 will not be pulled and damaged when the battery case 2 is taken out.

During the process of taking out the battery case 2, the battery base 6 will move with the battery case 2, because the holder 14 on the battery base 6 is connected to the circuit in the watch case 1 by the wire 10, when the wire 10 is not long enough, it will be pulled. Damage the wire 10 or even the circuit in the watch case 1. When the length of the wire 10 is greater than the depth of the battery case groove 15, the wire 10 will not be damaged by pulling when the battery case 2 leaves the battery case groove 15; after the battery case 2 leaves the battery case groove 15, the battery base 6 can be taken out relatively easily, because The situation of pulling and damaging the wire 10 is relatively easy to control.

In this embodiment: the bottom 17 of the battery box groove is provided with a battery box spring 5 acting on the battery box 2 . The effect of battery box spring 5 is: provide elastic force and battery box 2 is pushed out battery box groove 15 mouths, conveniently takes out battery box 2. When the toggle pin 3 and the bayonet pin 7 are moved, the locked state of the battery box 2 is released, and under the elastic force of the battery box spring 5 , the battery box 2 will pop out of the battery box groove 15 . Here the elastic force of the battery case spring 5 should not be too large, so that a fraction of the battery case 2 can be conveniently taken out of the battery case 2.

In this embodiment: the bottom of the battery compartment of the battery box 2 is provided with a through hole 11 . . The bottom of the battery compartment is opposite to the mouth of the battery compartment. The effect of the through hole 11 is to facilitate the removal of the battery 13. After taking out the battery case 2, the battery 13 can be poked through the through hole 11 with fingers to separate the battery case 2 from the battery 13.

Claims (9)

1. A multimeter with a battery box, comprising a watch case (1), characterized in that it also includes a battery box (2), the battery box (2) is provided with a battery compartment, and the watch case (1) is provided with a battery box slot ( 15), the battery box (2) is set in the battery box groove (15); A safety mechanism is provided between the watch case (1) and the battery box (2), and the safety mechanism includes a dial pin (3), a reset device, and an opening facing the watch case (1) and the battery box (2). A pair of pin holes (9); The pin hole (9) is provided with a sliding hole (91) communicated with the pin hole (9), and the dial pin (3) includes a pin bar (31) and a dial (32), and the pin bar (31) is arranged on the pair of pins. In the hole (9) and slidingly connected with two pin holes (9), the direction of sliding connection is the axial direction of the pin hole (9), and the dialer (32) is located on the pin rod (31) and passes through the sliding hole (91 ) extends beyond the pin hole (9); The reset device acts between the dial pin (3) and any pin hole (9); When there is no external force to stir the dial pin (3), the two ends of the pin bar (31) are respectively in the pin hole (9) on the watch case (1) and the battery box (2) under the action of the reset device, and the battery box (2) ) is in a locked state; When the toggle pin (3) is moved so that the two ends of the pin rod (31) are in the pin holes (9) of the watch case (1) or the battery box (2) simultaneously, the locked state of the battery box (2) is released. 2. The multimeter with battery box as claimed in claim 1, characterized in that: the reset device is a pin spring (4), and the sliding hole (91) is a long hole and is arranged on the side wall of the pin hole (9); The pin hole (9) is a stepped hole, the pin bar (31) is provided with a raised structure (33), and the pin spring (4) is sleeved on the pin bar (31) and one end is against the stepped surface (92) of the stepped hole , the other end against the raised structure (33). 3. The multimeter with battery box according to claim 2, characterized in that: the sliding hole (91) is arranged on the watch case (1). 4. The multimeter with battery box as claimed in claim 1, characterized in that: a fixing mechanism is provided between the battery box groove (15) and the battery box (2), and the fixing mechanism consists of a complete set of bayonet pins (7) and snap Groove (8), watch case (1) and battery box (2) are installed together by this fixing mechanism. 5. The multimeter with battery box as claimed in claim 4, characterized in that: the slot (8) is a recessed structure arranged on the inner side wall of the battery box slot (15); the bayonet pin (7) is a strip plate , the plate is provided with a protruding structure (71) corresponding to the card slot (8); The outer wall of the battery box (2) is provided with a groove that is sunken from the outer end surface (21) of the battery box to the bottom surface (12) of the battery box. The bayonet pin (7) is connected with the battery box (2), and only the bayonet pin ( 7) One end is connected to the bottom of the groove, and the end not connected to the battery case (2) extends to the outer end surface (21) of the battery case; there is a toggle gap between the inner surface of the detent (7) and the battery case (2) ( twenty two). 6. The multimeter with battery box as claimed in claim 1, characterized in that: the battery box (2) is provided with a detachable battery base (6), and the battery base (6) is provided with a card holder (14); The battery box (2) is provided with a baffle plate (16) parallel to any side thereof, and a base groove is provided between the baffle plate (16) and the side surface, and the battery base (6) is arranged in the base groove, and the baffle plate (16) A gap is arranged on the top, and the card holder (14) contacts with the electrodes of the battery (13) in the battery compartment through the gap; the card holder (14) is connected with the circuit in the watch case (1) by a wire (10). 7. The multimeter with battery box as claimed in claim 6, characterized in that: the battery box (2) is provided with one end of the base groove at the bottom (17) of the battery box groove (15), and the wire (10 ) length is greater than the battery box groove (15) depth. 8. The multimeter with battery box according to claim 7, characterized in that: the battery box bottom (17) is provided with a battery box spring (5) acting on the battery box (2). 9. The multimeter with a battery box according to any one of claims 1 to 8, characterized in that: the battery box bottom of the battery box (2) is provided with a through hole (11).