Collapsible hand saw

A collapsible hand saw has a head portion which has a first receptacle to detachably connect with one end of a frame portion, and a handle portion to fixedly connect with the other end of the frame portion, so as to form a bow shape had saw framework to detachably connect a blade. The head portion has an integrally formed hammer member and a V-shaped notch to substantially drive and pull a nail. In addition, a plurality of spare blades can be mounted with the frame portion between the head portion and the handle portion.

BACKGROUND OF THE INVENTION 
The present invention is related to hand saw, particularly to the type 
having collapsible handle and frame portion with a hammer and notch to 
pull out a nail. 
While it is conventionally used a hand saw, which is considered pertinent 
to the present invention, has a integrally formed bow-shaped framework to 
threadedly engage with a blade. It has been also proposed a hammer having 
a claw portion to pull out nails. However, it is advantageous to combine 
there two functions together when the weight is of main concerns. 
It is also observed that the conventional type of hand saw can not carry 
spare blade by itself. This is vital since the duration of blade is 
unpredictable. And conventionally, when a blade is broken in half or 
pieces, it becomes useless. However, it is or great interest to utilizes 
the broken piece, so as to decrease expenses in some extent. 
SUMMARY OF THE INVENTION 
The present invention utilizes a collapsible frame structure, within which 
a plurality of spare blades are disposed. A head portion is formed to a 
hammer shape provided with a notch for pulling out nail, while the handle 
is formed suitably for holding in reverse direction to facilitate the 
driving and pulling nails. 
Therefore, it is an object of the present invention to resolve the problems 
found in conventional types. 
It is also an object of the present invention to provide a hand saw which 
is suitable for both driving and pulling nails. 
Other advantages and objectives will be appreciated as the invention 
becomes better understood by reference to the following description when 
considered in connection with the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
With reference to FIGS. 1 and 2, a collapsible hand saw generally has a 
head portion 1, a frame portion 2, a handle portion 3 and a blade 4. 
The head portion 3 has a first opening 11 in cooperated with a second 
opening 31 defined on the handle portion 3 to interpose the frame member 
3, while a recess 12 laterally formed on the head portion to receive spare 
blades 7. 
Covered on the recess is a block member 6, on which a screw 6 is mounted. 
Therefore, the spare blades and the frame member can be secured. 
A V-shaped notch 14, which is best shown in FIGS. 1 and 4, is defined on 
the front of the head portion to pull out the nail (not shown). The head 
portion also has a hammer member 13 from integrally thereon, so as to 
drive a nail. 
Further referring to FIGS. 3 and 4, the head portion 1 can be used 
separately. The spare blade 7 or a broken blade can be snapped in the 
first opening 11 and secured by the block 5 via screw 6. This is 
advantageous when the working space is confined or when cutting a groove 
or slot is desired. 
FIG. 5 shows the assembly of the had saw. It is readily apparent that the 
hammer portion 13 as positioned in reverse can be used to drive a nail, 
while the V-shaped can be used to pull out a nail. 
The preferred embodiments of the present invention have been described 
herein and shown in the accompanying drawings to illustrate the underlying 
principle of the invention, but is it to be understood that numerous 
modification may be made without departing from the spirit and scope of 
this invention.