CN201112528Y - Charging device for hand-held electric tool - Google Patents

Abstract

A charging device of hand-held electric tool includes a battery seat and a charging seat, several conductive elements are set on a charging circuit board in the charging seat, the charging seat has a movable safety cover, when the battery seat is not used, the safety cover can cover these conductive elements, when the battery seat is combined with the charging seat, the safety cover can be pushed open and does not cover the conductive elements; the battery seat is provided with a plurality of conductive receiving parts which are contacted with the conductive elements on a battery circuit board. Therefore, the charging seat can protect the internal conductive element when not in use, avoid the conductive element from being exposed to the environment excessively and oxidized quickly, prevent impurities from being attached to the conductive element, reduce the risks of reduced conductivity and short circuit caused by the impurities, and reduce the volume, and is convenient to use.

Description

Charging device for hand-held electric tools

technical field

The utility model relates to an electric tool accessory, in particular to a charging device for a hand-held electric tool.

Background technique

A known hand-held electric tool and its charging device are disclosed in Fig. 1 and Fig. 2 of the new model of China TW No. M297821. The bottom of the hand-held electric tool carries a rechargeable battery with a base, and the rechargeable battery provides The power required for the operation of the power tool. When the power of the battery is exhausted, the operator can take out the base and combine it with a charging stand for charging. The battery and the charging stand are oppositely provided with a groove and a protruding column, and the protruding column and the groove are equipped with metal conductive elements that can be in contact with each other and conduct electricity. When the two are combined, they are in an electrically connected state. Practical use experience shows that small debris in the environment tends to fall into the groove and is difficult to clean up, which hinders the conductive effect of the relative contact between the metal conductive elements of the groove and the protrusion, and has a negative impact on the charging effect. If the intruded sundries are conductive, the charging stand will be in danger of short circuit and burning.

Therefore, the utility model proposes a new type of charging device for the hand-held electric tool.

Contents of the invention

The purpose of this utility model is to provide a charging device for a hand-held electric tool, so as to overcome the defects of the above-mentioned traditional structure, prevent the conductive element from being excessively exposed to the environment and cause rapid oxidation, and also prevent small debris from adhering to the device. On conductive components, reduce the risk of reduced electrical performance and short circuits. The safety cover can be pushed away when the battery holder is combined with the charging stand, which is very convenient to use.

According to the above purpose, a charging device for a hand-held electric tool, the charging device includes a battery seat and a charging seat, the battery seat and the charging seat have electronic components for charging and power transmission functions inside; it is characterized in that:

A charging circuit board is arranged inside the charging stand and is electrically connected to the above-mentioned electronic components to which the charging stand belongs;

A plurality of conductive elements, the first end of which is fixed on the charging circuit board of the seat, and the conductive element has a second end that can be engaged with the conductive receiving part, and the second end extends upward and protrudes in a bouncing up and down manner on the surface of the charging stand;

A safety cover that can be positioned at a first position and a second position and can move between the two is provided inside the charging stand; the first position completely covers the second ends of the above-mentioned plurality of conductive elements, the The second position completely exposes the second ends of the plurality of conductive elements;

a battery circuit board, located inside the battery holder, electrically connected to the electronic components inside the battery holder;

The number of conductive receiving parts corresponding to the number of the above-mentioned conductive elements is arranged on the battery circuit board, and each conductive receiving part has an area relatively larger than the cross-sectional area of the second end of the conductive element; the battery seat corresponds to the conductive receiving part There are a corresponding number of openings for exposing the conductive receiving portion;

Wherein, the safety cover has a spring with elastic force to make it normally located at the first position.

Wherein, the two ends of the spring are fixed on the charging circuit board of the seat, and wound around a spring receiving part of the safety cover.

Wherein, the battery circuit board of the battery seat includes two electric output parts.

Wherein, each electric output part includes a first conductive sheet, a second conductive sheet and a third conductive sheet, and two ends of the first conductive sheet are respectively arranged opposite to the second conductive sheet and the third conductive sheet.

Wherein, the interior of the charging stand has a plurality of positioning bosses that penetrate into the positioning holes around the charging circuit board of the charging stand, and its tail end has a stopper that prevents the positioning bosses from detaching from the positioning holes.

Wherein, the upper surface of the charging base is provided with an inclined guide surface for guiding the battery base into a charging position.

Wherein, the two sides of the guide surface and the relative position of the battery seat are provided with protrusions and grooves that can be slidably engaged with each other. Beneficial effects of the utility model: Based on the above-mentioned central idea of the utility model, the assembly and connection of the internal electronic components of the charging stand and the battery stand can be simplified by using the charging circuit board of the seat and the battery circuit board.

The safety cover of the utility model can protect the internal conductive elements when the charging stand is not in use, prevent the conductive elements from being excessively exposed to the environment and cause rapid oxidation, and can also prevent small debris from adhering to the conductive elements, reducing the This leads to reduced electrical performance and the risk of short circuits. The safety cover can be pushed away when the battery holder is combined with the charging stand, which is very convenient to use.

The conductive receiving part of the battery holder of the utility model has a predetermined size and the relative area is larger than the cross-sectional area of the conductive element of the charging stand, so as to provide a relatively large conductive contact area to ensure that when charging, each conductive element The second end does make contact with the conductive receiving portion.

When the battery holder of the utility model is combined with an electric tool for power supply, its two electric output parts form four effective electric transmission contact parts in total with respect to the pins of the electric energy receiving part of the electric tool, increasing the contact area of the two to ensure The battery can stably transmit power to the electric tool, especially to cope with the power required by the high-horsepower operation of the electric tool.

Based on the appearance of the charging stand and the battery stand disclosed in the present invention, the space can be effectively used to reduce the volume of the charging stand and the battery stand.

In order to illustrate the central idea of the utility model in the column of the above-mentioned content of the invention, it is expressed in specific embodiments. The various objects and their deformation or displacement in the embodiments are drawn according to the scale suitable for illustration, not according to the scale of actual components, and are described first.

Description of drawings

Fig. 1 is a three-dimensional exploded view of the battery holder and the charging stand of the present invention.

Fig. 2 is a combined appearance diagram of the battery holder and the charging stand of the present invention.

Fig. 3 is a three-dimensional appearance view of the safety cover of the charging stand of the present invention being pushed away by the battery stand.

Fig. 4 is a three-dimensional exploded view of the safety cover and the charging circuit board of the seat of the present invention.

Fig. 5 is a three-dimensional exploded view of the battery holder of the present invention.

Fig. 6 is an appearance diagram of the battery circuit board of the present invention.

Fig. 7 is a combined side and partial cross-sectional view of the battery holder and the charging stand of the present invention.

Detailed ways

Please refer to FIG. 1 and FIG. 2 , the charging device of the present invention includes a battery holder 60 and a charging stand 30 . The battery holder 60 is combined with a hand-held electric tool (not shown), and its rechargeable battery provides the power required for the operation of the electric tool; the battery holder can also be detached from the electric tool and combined with the electric tool. Charge on the charging stand 30.

The charging stand 30 shown in FIG. 1 and FIG. 2 has been equipped with related electronic components with power transmission function, which are known technologies and will not be repeated here.

Please refer to Figures 1 to 4, the features of the charging stand 30 of the present invention include:

An inclined guide surface 32 is provided on the upper surface of the base body 31 of the charging stand 30 , and the guide surface 32 is used to guide the battery stand 60 into a charging position for positioning. Both sides of the guide surface 32 and the relative position of the battery seat 60 are provided with protrusions 33 and grooves 61 that can be slidably engaged with each other to assist the battery seat 60 to accurately arrive at the charging position, or move in a reverse direction. direction away from the charging position.

A charging circuit board 40 is fixed inside the seat body 31 of the charging stand 30, and the printed circuit on it is electrically connected with the above-mentioned electronic components with power transmission function; a conductive unit 41 is arranged on the charging circuit board 40 of the seat, The conductive unit 41 is composed of several hook-shaped conductive elements 42. The first end 421 of each conductive element 42 is fixed on the charging circuit board 40, and the second end 422 is raised upward to form a spring that can bounce up and down. state and protrude from the upper surface of the seat body 31.

A safety cover 50 is arranged inside the seat body 31, and it can be positioned at a first position and a second position, and can move between the two. The first position completely covers the second ends 422 (as shown in FIG. 1 ) of the above-mentioned several conductive elements 42, and the second position completely exposes the second ends 422 (as shown in FIG. 3 ) of the above-mentioned several conductive elements 42. ). The safety cover 50 is normally located at the first position under the elastic force of a spring 51. When the above-mentioned battery holder 60 is combined with the charging stand 30, the safety cover 50 is pushed to the second position, so that the second position of the conductive element 42 The two ends 422 are engaged with the conductive receiving portion 71 of the battery holder 60 to generate a conductive function. Both ends of the spring 51 are fixed on the charging circuit board 40 and bypass the spring receiving portion 52 of the safety cover 50 .

1 , 2 , 5 , and 6 , the battery holder 60 already has a rechargeable battery 63 and electronic components with a power transmission function inside. This part is a known technology and will not be repeated here.

Please refer to Fig. 5 and Fig. 6, the features of the battery holder 60 of the present invention include:

A battery circuit board 70 is fixed inside the battery seat 60, and the printed circuit on it is electrically connected with the above-mentioned rechargeable battery 63 and its associated electronic components with power transmission function.

The number of conductive receiving parts 71 corresponding to the above-mentioned conductive elements 42 is provided on the battery circuit board 70, and each conductive receiving part 71 has a predetermined size and an area relatively larger than the cross-sectional area of the second end 422 of the conductive element 42; The battery holder 60 is provided with a corresponding number of openings 64 corresponding to the conductive receiving portion 71, so that the conductive receiving portion 71 is exposed, and when the battery holder 60 is combined with the charging stand 30, the second end 422 of the conductive element 42 can be connected to the conductive receiving portion 71. The receiving part 71 is connected to generate a conductive function.

Two electric output parts 80, located on the battery circuit board 70, each electric output part 80 includes a first conductive sheet 81, a second conductive sheet 82 and a third conductive sheet 83, the first conductive sheet 81 The two ends are respectively opposite to the second conductive sheet 82 and the third conductive sheet 83, and a pin (not shown) belonging to the electric receiving part of the electric tool can be inserted therebetween, and the two electric energy output parts 80 form a total of four a conductive contact.

As shown in Figure 7, the battery holder 60 of the present utility model is slidably embedded on the charging stand 30 at a charging position. When the battery holder 60 is slidably embedded in the charging stand 30, the safety cover 50 is pushed open , the second end 422 of the conductive element 42 of the charging stand 30 can contact the conductive receiving portion 71 of the battery stand 60 , and charging starts. The figure briefly shows that the interior of the charging stand 30 is penetrated into the positioning holes around the charging circuit board 40 by a number of positioning bosses 34 extending downward, and a rear end of the positioning boss 34 is formed or arranged. The blocking portion 341 prevents the positioning post 34 from disengaging from the positioning hole 43 , and accordingly, the charging circuit board 40 of the charging base is fixed in the charging base 30 .

Although the utility model is illustrated with a preferred embodiment, those skilled in the art can make various changes without departing from the spirit and scope of the utility model. The above-mentioned embodiments are only used to illustrate the utility model, and are not intended to limit the scope of the utility model. All modifications or changes that do not violate the spirit of the utility model belong to the patent scope of the utility model.

Claims (8)

1. A charging device for a hand-held electric tool, the charging device includes a battery holder (60) and a charging holder (30), and the battery holder (60) and the charging holder (30) have functions for charging and power transmission inside An electronic assembly; characterized in that: A charging circuit board (40), located inside the charging stand (30), is electrically connected to the above-mentioned electronic components to which the charging stand (30) belongs; A plurality of conductive elements (42), the first end (421) of which is fixed on the charging circuit board (40) of the seat, and the conductive element (42) has a second end ( 422), the second end (422) extends upwards and can bounce up and down to protrude from the surface of the charging base (30); A safety cover (50), which can be positioned at a first position and a second position and can move between the two, is arranged inside the charging stand (30); the first position completely covers the above-mentioned several conductive elements The second end (422) of (42), the second position completely exposes the second ends (422) of the above-mentioned plurality of conductive elements (42); a battery circuit board (70), arranged inside the battery holder (60), and electrically connected to the electronic components inside the battery holder (60); The number of conductive receiving parts (71) corresponding to the number of the above-mentioned conductive elements (42) is arranged on the battery circuit board (70), and each conductive receiving part (71) has a size relatively larger than that of the conductive element (42). The area of the cross-section of the two ends (422); the battery seat (60) is provided with a corresponding number of openings (64) corresponding to the conductive receiving part (71) to expose the conductive receiving part (71). 2 . The charging device for a hand-held electric tool according to claim 1 , wherein the safety cover ( 50 ) has a spring ( 51 ) with elastic force that enables it to be normally located at the first position. 3 . 3. The charging device of the hand-held electric tool according to claim 2, characterized in that, the two ends of the spring (51) are fixed on the charging circuit board (40) of the seat and wound around the safety cover (50) A spring receiving part (52). 4. The charging device for a hand-held electric tool according to claim 1, characterized in that, the battery circuit board (70) of the battery holder (60) includes two electric output parts (80). 5. The charging device of the hand-held electric tool according to claim 4, characterized in that, each electric output part (80) comprises a first conductive sheet (81), a second conductive sheet (82) and a third A conductive sheet (83), the two ends of the first conductive sheet (81) are respectively arranged opposite to the second conductive sheet (82) and the third conductive sheet (83). 6. The charging device of the hand-held electric tool according to claim 1, characterized in that, the inside of the charging base (30) is extended with several positioning bosses (34) penetrating into the positioning around the charging circuit board (40) of the base. In the hole (43), there is a stop portion (341) at the tail end to prevent the positioning boss (34) from detaching from the positioning hole (43). 7. The charging device of the hand-held electric tool according to claim 1, characterized in that, the upper surface of the charging stand (30) is provided with an inclined guide surface ( 32). 8. The charging device of the hand-held electric tool according to claim 7, characterized in that, the relative positions on both sides of the guide surface (32) and the battery seat (60) are provided with projections ( 33) and groove (61).

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