| 摘要 |
A biasing structure (40) for maintaining a pawl (24) in engagement with a toothed gear (20) of a ratchet wrench is provided. The structure includes an elongated plunger (44) having an axis, a pawl engagement end (52), a spring insertion portion (54) having a free end (56), a central portion (58) connecting the engagement end (52) to the spring insertion portion (54), and an annular first shoulder (62) having a shoulder diameter (d4) formed between the spring insertion portion (54) and the central portion (58). The spring insertion portion (54) is tapered from a maximum diameter at the first shoulder (d2) to a minimum diameter (d5) at the free end. The structure also includes a compression spring (42) coupled to the plunger assembly and having a plurality of coils (46) (48) (50), wherein at least one of the coils (46) has a diameter less than the shoulder diameter and is disposed about the central portion. A reversible ratchet wrench (10) having a pawl (24) and using the biasing structure (40) is also provided.
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